Senior Developer Senior Software Engineer C#, .Net, Typescript, JavaScript Hybrid, 1-2 days near Liverpool Street Salary, 85,000 to 95,000 + benefits If you enjoy solving complex engineering problems, learning from highly capable peers, and working on a product where your contribution genuinely matters, please read on. We're hiring for a growing, well-funded SaaS business building a sophisticated, data-driven platform that helps organisations understand and manage complex information at scale. The company is in an early investment phase with strong growth ambitions, offering real scope for progression and the chance to help shape both the product and engineering direction. You'll be part of a bright, collaborative team of talented software engineers and academically strong problem-solvers who value clean design and thoughtful architecture. The Role As a Full Stack Engineer, you'll design and deliver features across a modern stack, working on scalable backend services and intuitive front-end applications that present complex data clearly. Key Responsibilities: Building full-stack features using C#, .NET and TypeScript/React Developing scalable backend services for complex data workflows Creating responsive, user-friendly interfaces Exploring new technologies and contributing to technical improvements Working collaboratively in an agile engineering environment Essential Skills & Experience Strong commercial experience as a Software Developer or Full Stack Engineer 5+ years experience with C# / .NET and modern JavaScript or Typescript (React preferred) Strong problem-solving ability and a collaborative mindset A Bachelor's degree in Computer Science or Software Engineering. 2.1 or above Why Join? Technically challenging, data-driven SaaS product Strong investment for growth Work alongside a highly capable and intellectually strong team Excellent learning opportunities and clear progression as the company grows If you're looking for a role where you can learn quickly, tackle interesting technical challenges, and grow with an ambitious product business, hit apply ! Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
Mar 30, 2026
Full time
Senior Developer Senior Software Engineer C#, .Net, Typescript, JavaScript Hybrid, 1-2 days near Liverpool Street Salary, 85,000 to 95,000 + benefits If you enjoy solving complex engineering problems, learning from highly capable peers, and working on a product where your contribution genuinely matters, please read on. We're hiring for a growing, well-funded SaaS business building a sophisticated, data-driven platform that helps organisations understand and manage complex information at scale. The company is in an early investment phase with strong growth ambitions, offering real scope for progression and the chance to help shape both the product and engineering direction. You'll be part of a bright, collaborative team of talented software engineers and academically strong problem-solvers who value clean design and thoughtful architecture. The Role As a Full Stack Engineer, you'll design and deliver features across a modern stack, working on scalable backend services and intuitive front-end applications that present complex data clearly. Key Responsibilities: Building full-stack features using C#, .NET and TypeScript/React Developing scalable backend services for complex data workflows Creating responsive, user-friendly interfaces Exploring new technologies and contributing to technical improvements Working collaboratively in an agile engineering environment Essential Skills & Experience Strong commercial experience as a Software Developer or Full Stack Engineer 5+ years experience with C# / .NET and modern JavaScript or Typescript (React preferred) Strong problem-solving ability and a collaborative mindset A Bachelor's degree in Computer Science or Software Engineering. 2.1 or above Why Join? Technically challenging, data-driven SaaS product Strong investment for growth Work alongside a highly capable and intellectually strong team Excellent learning opportunities and clear progression as the company grows If you're looking for a role where you can learn quickly, tackle interesting technical challenges, and grow with an ambitious product business, hit apply ! Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
White Collar Factory (95009), United Kingdom, London, London Lead Software Development Engineer - Services About this role Capital One's mission is to change banking for good by bringing humanity, ingenuity and simplicity to banking. Sitting at the core of such values is our Software Engineering department whose primary role is to be an enabler of our ambitions. Capital One is looking for a Senior Software Development Engineer to join a backend team, based in our London office on a hybrid basis. Our Engineers are people who lead by example, build strong and valuable relationships and have the confidence to influence at all levels. We are proud of who we are and what we do and want you to join us at this particularly exciting time at Capital One. What you'll do You will lead a team or cross-functional squad in the delivery of complex and ambiguous projects that support a broader business outcome You will take end-to-end responsibility for technical design, implementation, and operational considerations Collaborate with engineers, architects, product owners, and stakeholders to ensure successful project outcomes You will play a crucial role in supporting the elevation of engineering enablement, excellence, and experience across the broader engineering community You will collaborate and contribute to the development and dissemination of standardised and sustainable best practices, tools, patterns, and frameworks that enhance the productivity and quality of engineering efforts business-wide Your focus is on a major portion of existing or new team software (e.g., significant component, set of features, mid-size application or service) You'll work to achieve the goals and vision shared by Product Management and your Tribe Leadership Innovate within your team, initiative area and contribute within your technical domain What we're looking for Proven experience in technical leadership, including leading a team or cross-functional squad Proven experience working in both backend services and mobile technologies Exceptional programming skills and knowledge of building APIs using modern OO languages preferably Java, SOLID principles, SOA, HTTP and REST Experience with AWS and strong understanding of cloud-based development Extensive, demonstrable knowledge of designing architectures that are secure and perform at scale You're able to effectively communicate and work collaboratively across engineering to maximise inner-sourcing opportunities and reduce waste Proven experience ability to deliver high quality applications at scale An advocate for quality and the ability to support the team, leveraging approaches such as Pair Programming, TDD and BDD Where and how you'll work This is a permanent position and will be based in our London office. We have a hybrid working model which gives you flexibility to work from our offices and from home. We're big on collaboration and connection, so you'll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays. What's in it for you Bring us all this - and you'll be handsomely rewarded with a role contributing to the product roadmap for an organisation committed to transformation We're continuing our journey into the public cloud and have problems of scale, security, availability and performance for you to help solve We love continuous learning and that's why we give you 10% of your time to work on cutting edge innovative projects that shape the way we will work in the future We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers) Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave Open-plan workspaces and facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café What you should know about how we recruit We are committed to creating a level playing field and seek to create teams that are representative of our customers and the communities we serve. We'd love to hear from you if you identify with a typically under-represented group in our industry and are particularly keen to hear from women and ethnic minority candidates. We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it's about what you do, not just what you say. That's why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages. We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few: REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies OutFront - to provide LGBTQ+ support for all associates Mind Your Mind - signposting support and promoting positive mental wellbeing for all Women in Tech - promoting an inclusive environment in tech EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry Capital One is committed to diversity in the workplace. If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment. For technical support or questions about Capital One's recruiting process, please send an email to Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site. Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC). Who We Are At Capital One, we're building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a mission to help our customers succeed by bringing ingenuity, simplicity, and humanity to banking. We measure our efforts by the success our customers enjoy and the advocacy they exhibit. We are succeeding because they are succeeding. Guided by our shared values, we thrive in an environment where collaboration and openness are valued. We believe that innovation is powered by perspective and that teamwork and respect for each other lead to superior results. We elevate each other and obsess about doing the right thing. Our associates serve with humility and a deep respect for their responsibility in helping our customers achieve their goals and realize their dreams. Together, we are on a quest to change banking for good.
Mar 29, 2026
Full time
White Collar Factory (95009), United Kingdom, London, London Lead Software Development Engineer - Services About this role Capital One's mission is to change banking for good by bringing humanity, ingenuity and simplicity to banking. Sitting at the core of such values is our Software Engineering department whose primary role is to be an enabler of our ambitions. Capital One is looking for a Senior Software Development Engineer to join a backend team, based in our London office on a hybrid basis. Our Engineers are people who lead by example, build strong and valuable relationships and have the confidence to influence at all levels. We are proud of who we are and what we do and want you to join us at this particularly exciting time at Capital One. What you'll do You will lead a team or cross-functional squad in the delivery of complex and ambiguous projects that support a broader business outcome You will take end-to-end responsibility for technical design, implementation, and operational considerations Collaborate with engineers, architects, product owners, and stakeholders to ensure successful project outcomes You will play a crucial role in supporting the elevation of engineering enablement, excellence, and experience across the broader engineering community You will collaborate and contribute to the development and dissemination of standardised and sustainable best practices, tools, patterns, and frameworks that enhance the productivity and quality of engineering efforts business-wide Your focus is on a major portion of existing or new team software (e.g., significant component, set of features, mid-size application or service) You'll work to achieve the goals and vision shared by Product Management and your Tribe Leadership Innovate within your team, initiative area and contribute within your technical domain What we're looking for Proven experience in technical leadership, including leading a team or cross-functional squad Proven experience working in both backend services and mobile technologies Exceptional programming skills and knowledge of building APIs using modern OO languages preferably Java, SOLID principles, SOA, HTTP and REST Experience with AWS and strong understanding of cloud-based development Extensive, demonstrable knowledge of designing architectures that are secure and perform at scale You're able to effectively communicate and work collaboratively across engineering to maximise inner-sourcing opportunities and reduce waste Proven experience ability to deliver high quality applications at scale An advocate for quality and the ability to support the team, leveraging approaches such as Pair Programming, TDD and BDD Where and how you'll work This is a permanent position and will be based in our London office. We have a hybrid working model which gives you flexibility to work from our offices and from home. We're big on collaboration and connection, so you'll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays. What's in it for you Bring us all this - and you'll be handsomely rewarded with a role contributing to the product roadmap for an organisation committed to transformation We're continuing our journey into the public cloud and have problems of scale, security, availability and performance for you to help solve We love continuous learning and that's why we give you 10% of your time to work on cutting edge innovative projects that shape the way we will work in the future We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers) Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave Open-plan workspaces and facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café What you should know about how we recruit We are committed to creating a level playing field and seek to create teams that are representative of our customers and the communities we serve. We'd love to hear from you if you identify with a typically under-represented group in our industry and are particularly keen to hear from women and ethnic minority candidates. We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it's about what you do, not just what you say. That's why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages. We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few: REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies OutFront - to provide LGBTQ+ support for all associates Mind Your Mind - signposting support and promoting positive mental wellbeing for all Women in Tech - promoting an inclusive environment in tech EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry Capital One is committed to diversity in the workplace. If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment. For technical support or questions about Capital One's recruiting process, please send an email to Capital One does not provide, endorse nor guarantee and is not liable for third-party products, services, educational tools or other information available through this site. Capital One Financial is made up of several different entities. Please note that any position posted in Canada is for Capital One Canada, any position posted in the United Kingdom is for Capital One Europe and any position posted in the Philippines is for Capital One Philippines Service Corp. (COPSSC). Who We Are At Capital One, we're building a leading information-based technology company. Still founder-led by Chairman and Chief Executive Officer Richard Fairbank, Capital One is on a mission to help our customers succeed by bringing ingenuity, simplicity, and humanity to banking. We measure our efforts by the success our customers enjoy and the advocacy they exhibit. We are succeeding because they are succeeding. Guided by our shared values, we thrive in an environment where collaboration and openness are valued. We believe that innovation is powered by perspective and that teamwork and respect for each other lead to superior results. We elevate each other and obsess about doing the right thing. Our associates serve with humility and a deep respect for their responsibility in helping our customers achieve their goals and realize their dreams. Together, we are on a quest to change banking for good.
Forward Deployed Engineer (FDE Python AWS SaaS) Manchester / WFH to £80k Do you have strong backend Python and AWS skills combined with client facing experience? You could be progressing your career in a senior, hands-on Forward Deployed Engineer role at a profitable technology scale-up that is producing a software suite for legal firms that massively reduces para-legal workloads, they have seen hug click apply for full job details
Mar 28, 2026
Full time
Forward Deployed Engineer (FDE Python AWS SaaS) Manchester / WFH to £80k Do you have strong backend Python and AWS skills combined with client facing experience? You could be progressing your career in a senior, hands-on Forward Deployed Engineer role at a profitable technology scale-up that is producing a software suite for legal firms that massively reduces para-legal workloads, they have seen hug click apply for full job details
About Zego At Zego, we understand that traditional motor insurance holds good drivers back. It's too complicated, too expensive, and it doesn't reflect how well you actually drive. Since 2016, we have been on a mission to change that by offering the lowest priced insurance for good drivers. From van drivers and gig workers to everyday car drivers, our customers are the driving force behind everything we do. We've sold tens of millions of policies and raised over "$200 million in funding. And we're only just getting started. Overview of the Product team Product Managers at Zego are change makers. We build and scale data driven, impactful solutions that enable Zego to offer competitive and personalised insurance. Working in a fast paced Agile environment, our team thrives on innovation, cross functional collaboration, and driving measurable outcomes. From enhancing pricing models to streamlining digital experiences, our Product team is instrumental in shaping the future of insurance. About the role Our Pricing teams are a critical part of our mission to offer the lowest priced insurance for good drivers. They are made up of actuaries, data scientists, underwriters, software engineers, and ML engineers who work relentlessly to understand risk and price every quote accurately. You'll be working as a Senior Platform Product Manager of the Pricing Platform team, one of the Pricing teams. Pricing Platform sits at the heart of our pricing domain by providing the infrastructure that empowers every team member to move at speed with their own roles, be it enabling actuaries to deploy pricing changes, allowing data scientists to build and deploy ML models, or empowering underwriters to control quote manipulation. You'll need to be based either in the UK or in Portugal, see additional details at the bottom of this job description. Over the next 12 months, you'll spearhead a significant transformation of the Pricing Platform to support Zego's growth and customer ambitions. What you'll be doing Lead the definition of the quarterly strategy for the Pricing Platform team and contribute to long term thinking Lead the discovery and prioritisation of initiatives that contribute to Zego's goals, including defining the next stage of growth for the Pricing Platform Translate complex business requirements into clear, deliverable solutions, balancing long term vision with short term delivery Dive deep into technical detail to understand system dependencies, uncover risks, and make informed trade offs Partner with stakeholders across multiple business domains to align on priorities, manage competing demands, and deliver business impact Lead the delivery of prioritised initiatives, collaborating cross functionally with engineering, data, legal, compliance, and pricing teams as needed Measure success rigorously, setting KPIs to track reliability, scalability, and business outcomes, and using data to drive continuous improvement What you'll need to be successful A track record of delivering impact in fast paced, high growth environments A self starter mindset with ownership, accountability, and a bias for action Significant experience as a Product Manager in a platform oriented role, ideally with exposure to backend services or complex systems within insurance, financial services or pricing domains Strong technical literacy, with the ability to engage confidently with engineers on system architecture, APIs, ML, and service design. Ideally, you'll come from a technical background such as engineering or data science Strong data driven and analytical mindset, comfortable querying and analysing data from various sources such as databases, Amplitude, Looker, etc., to inform decision making Proven ability to work across multiple business domains, balancing diverse requirements and delivering solutions that serve the bigger picture Excellent problem solving skills, with the ability to untangle complexity, manage dependencies, and create clarity where there is ambiguity Outstanding communication and stakeholder management skills, with the ability to influence at all levels of the business You will be someone who's actively curious about how AI can enhance your work - keen to experiment, learn quickly, and apply tools that improve productivity, streamline tasks, or unlock new ways of thinking. Whether you're already hands on or fast building confidence, you take ownership of staying ahead and working smarter What's it like to work at Zego? Joining Zego is a career defining move. People go further here, reaching their full potential to achieve extraordinary things. We're spread throughout the UK and Europe, and united by our drive to get things done. We're proud of our company and our culture - a friendly and inclusive space where we can lift each other up and celebrate our wins every day. Together, we're setting the bar higher, delivering exceptional work that makes a difference. Our people are the most important part of our story, and everyone here plays a role. There's loads of room to learn and grow, and you'll get the freedom to steer your career wherever you want. You'll work alongside a talented group who embrace each other's differences and aren't afraid of a challenge. We recognise our achievements, learn from our mistakes, and help each other to be the best we can be. Together, we're making insurance matter. How we work We believe that teams work better when they have time to collaborate and space to get things done. We call it Zego Hybrid. While some of our team choose to come into our central London office once a week, we're flexible - some people prefer being in once a month or even quarterly. It's all about finding the right balance between collaborative face time and focused home working, so we can achieve great results while maintaining a healthy work life balance. Our approach to AI We believe in the power of AI to meaningfully improve how we work - helping us move faster, think differently, and focus on what matters most. At Zego, we encourage people to stay curious and intentional about how AI is leveraged in their work and teams to drive practical impact every day. This is your chance to do the most meaningful work of your career - and we'll provide you with the tools, support, and freedom to do it well. Benefits We reward our people well. Join us and you'll get a market competitive salary, private medical insurance, company share options, generous holiday allowance, and a whole lot of wellbeing benefits. We also offer an annual flexible hybrid working contribution, which you can use to support with your travel to the office or towards your own personal development. And that's just for starters! There's more to Zego than just a job - Check out our blog for insights, stories, and more. Equal opportunity employer We're an equal opportunity employer and we value diversity at our company. We do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, marital status, or disability status.
Mar 28, 2026
Full time
About Zego At Zego, we understand that traditional motor insurance holds good drivers back. It's too complicated, too expensive, and it doesn't reflect how well you actually drive. Since 2016, we have been on a mission to change that by offering the lowest priced insurance for good drivers. From van drivers and gig workers to everyday car drivers, our customers are the driving force behind everything we do. We've sold tens of millions of policies and raised over "$200 million in funding. And we're only just getting started. Overview of the Product team Product Managers at Zego are change makers. We build and scale data driven, impactful solutions that enable Zego to offer competitive and personalised insurance. Working in a fast paced Agile environment, our team thrives on innovation, cross functional collaboration, and driving measurable outcomes. From enhancing pricing models to streamlining digital experiences, our Product team is instrumental in shaping the future of insurance. About the role Our Pricing teams are a critical part of our mission to offer the lowest priced insurance for good drivers. They are made up of actuaries, data scientists, underwriters, software engineers, and ML engineers who work relentlessly to understand risk and price every quote accurately. You'll be working as a Senior Platform Product Manager of the Pricing Platform team, one of the Pricing teams. Pricing Platform sits at the heart of our pricing domain by providing the infrastructure that empowers every team member to move at speed with their own roles, be it enabling actuaries to deploy pricing changes, allowing data scientists to build and deploy ML models, or empowering underwriters to control quote manipulation. You'll need to be based either in the UK or in Portugal, see additional details at the bottom of this job description. Over the next 12 months, you'll spearhead a significant transformation of the Pricing Platform to support Zego's growth and customer ambitions. What you'll be doing Lead the definition of the quarterly strategy for the Pricing Platform team and contribute to long term thinking Lead the discovery and prioritisation of initiatives that contribute to Zego's goals, including defining the next stage of growth for the Pricing Platform Translate complex business requirements into clear, deliverable solutions, balancing long term vision with short term delivery Dive deep into technical detail to understand system dependencies, uncover risks, and make informed trade offs Partner with stakeholders across multiple business domains to align on priorities, manage competing demands, and deliver business impact Lead the delivery of prioritised initiatives, collaborating cross functionally with engineering, data, legal, compliance, and pricing teams as needed Measure success rigorously, setting KPIs to track reliability, scalability, and business outcomes, and using data to drive continuous improvement What you'll need to be successful A track record of delivering impact in fast paced, high growth environments A self starter mindset with ownership, accountability, and a bias for action Significant experience as a Product Manager in a platform oriented role, ideally with exposure to backend services or complex systems within insurance, financial services or pricing domains Strong technical literacy, with the ability to engage confidently with engineers on system architecture, APIs, ML, and service design. Ideally, you'll come from a technical background such as engineering or data science Strong data driven and analytical mindset, comfortable querying and analysing data from various sources such as databases, Amplitude, Looker, etc., to inform decision making Proven ability to work across multiple business domains, balancing diverse requirements and delivering solutions that serve the bigger picture Excellent problem solving skills, with the ability to untangle complexity, manage dependencies, and create clarity where there is ambiguity Outstanding communication and stakeholder management skills, with the ability to influence at all levels of the business You will be someone who's actively curious about how AI can enhance your work - keen to experiment, learn quickly, and apply tools that improve productivity, streamline tasks, or unlock new ways of thinking. Whether you're already hands on or fast building confidence, you take ownership of staying ahead and working smarter What's it like to work at Zego? Joining Zego is a career defining move. People go further here, reaching their full potential to achieve extraordinary things. We're spread throughout the UK and Europe, and united by our drive to get things done. We're proud of our company and our culture - a friendly and inclusive space where we can lift each other up and celebrate our wins every day. Together, we're setting the bar higher, delivering exceptional work that makes a difference. Our people are the most important part of our story, and everyone here plays a role. There's loads of room to learn and grow, and you'll get the freedom to steer your career wherever you want. You'll work alongside a talented group who embrace each other's differences and aren't afraid of a challenge. We recognise our achievements, learn from our mistakes, and help each other to be the best we can be. Together, we're making insurance matter. How we work We believe that teams work better when they have time to collaborate and space to get things done. We call it Zego Hybrid. While some of our team choose to come into our central London office once a week, we're flexible - some people prefer being in once a month or even quarterly. It's all about finding the right balance between collaborative face time and focused home working, so we can achieve great results while maintaining a healthy work life balance. Our approach to AI We believe in the power of AI to meaningfully improve how we work - helping us move faster, think differently, and focus on what matters most. At Zego, we encourage people to stay curious and intentional about how AI is leveraged in their work and teams to drive practical impact every day. This is your chance to do the most meaningful work of your career - and we'll provide you with the tools, support, and freedom to do it well. Benefits We reward our people well. Join us and you'll get a market competitive salary, private medical insurance, company share options, generous holiday allowance, and a whole lot of wellbeing benefits. We also offer an annual flexible hybrid working contribution, which you can use to support with your travel to the office or towards your own personal development. And that's just for starters! There's more to Zego than just a job - Check out our blog for insights, stories, and more. Equal opportunity employer We're an equal opportunity employer and we value diversity at our company. We do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, marital status, or disability status.
£65,000 - £80,000 (flexible depending on experience) We are looking for an experienced Senior Software Engineer to join a growing technology business. This opportunity has been created due to continued growth and increasing demand for scalable, cloud-based solutions across the organisation's product portfolio. The company is focused on building modern, high-performance platforms that enable clients to solve complex operational challenges through data-driven technology. Their systems are designed to support high-volume environments while maintaining reliability, scalability, and long-term maintainability. This role will suit someone who enjoys working in a collaborative engineering environment and wants to contribute both technically and strategically to the evolution of a modern software platform. Key Responsibilities Designing, developing, and enhancing scalable backend systems and cloud-native services Contributing to architectural decisions to ensure systems remain secure, resilient, and maintainable Developing and integrating APIs to support internal and external platform functionality Working closely with product, engineering, and operational teams to deliver robust technical solutions Driving improvements in code quality, engineering standards, and delivery processes Supporting production environments, troubleshooting complex issues, and improving system observability Mentoring and supporting other engineers within the team Key Skills Strong industry experience designing and delivering scalable cloud-based software systems High proficiency in C# and solid experience across the .NET ecosystem Experience building distributed or high-throughput systems in production environments Strong understanding of modern software engineering practices including CI/CD, automated testing, and DevOps principles Experience contributing to system architecture and technical leadership within teams Excellent problem-solving and debugging capabilities Desirable Skills Experience working within product-led or scaling technology organisations Exposure to containerisation, cloud optimisation, or infrastructure-as-code Experience improving legacy platforms or leading modernisation initiatives Understanding of performance engineering or reliability-focused system design What you get in return Salary £65,000 - £80,000 depending on experience Flexible hybrid working (3 days onsite / 2 remote) Generous annual leave allowance Professional development support and learning opportunities Enhanced family-friendly policies Health and wellbeing support Pension scheme and additional lifestyle benefits Regular team and social activities Cycle to Work scheme This company is an equal opportunity employer and values diversity. They do not discriminate on the basis of race, religion, gender, sexual orientation, age, disability, or background. Interested? Please submit your CV to Chrissie Rehman via the application link provided. Alternatively, you can contact directly to discuss the role in more detail. DCS Recruitment and all associated companies are committed to creating a working environment where diversity is celebrated and everyone is treated fairly, regardless of gender, gender identity, disability, ethnic origin, religion or belief, sexual orientation, marital or transgender status, age, or nationality
Mar 27, 2026
Full time
£65,000 - £80,000 (flexible depending on experience) We are looking for an experienced Senior Software Engineer to join a growing technology business. This opportunity has been created due to continued growth and increasing demand for scalable, cloud-based solutions across the organisation's product portfolio. The company is focused on building modern, high-performance platforms that enable clients to solve complex operational challenges through data-driven technology. Their systems are designed to support high-volume environments while maintaining reliability, scalability, and long-term maintainability. This role will suit someone who enjoys working in a collaborative engineering environment and wants to contribute both technically and strategically to the evolution of a modern software platform. Key Responsibilities Designing, developing, and enhancing scalable backend systems and cloud-native services Contributing to architectural decisions to ensure systems remain secure, resilient, and maintainable Developing and integrating APIs to support internal and external platform functionality Working closely with product, engineering, and operational teams to deliver robust technical solutions Driving improvements in code quality, engineering standards, and delivery processes Supporting production environments, troubleshooting complex issues, and improving system observability Mentoring and supporting other engineers within the team Key Skills Strong industry experience designing and delivering scalable cloud-based software systems High proficiency in C# and solid experience across the .NET ecosystem Experience building distributed or high-throughput systems in production environments Strong understanding of modern software engineering practices including CI/CD, automated testing, and DevOps principles Experience contributing to system architecture and technical leadership within teams Excellent problem-solving and debugging capabilities Desirable Skills Experience working within product-led or scaling technology organisations Exposure to containerisation, cloud optimisation, or infrastructure-as-code Experience improving legacy platforms or leading modernisation initiatives Understanding of performance engineering or reliability-focused system design What you get in return Salary £65,000 - £80,000 depending on experience Flexible hybrid working (3 days onsite / 2 remote) Generous annual leave allowance Professional development support and learning opportunities Enhanced family-friendly policies Health and wellbeing support Pension scheme and additional lifestyle benefits Regular team and social activities Cycle to Work scheme This company is an equal opportunity employer and values diversity. They do not discriminate on the basis of race, religion, gender, sexual orientation, age, disability, or background. Interested? Please submit your CV to Chrissie Rehman via the application link provided. Alternatively, you can contact directly to discuss the role in more detail. DCS Recruitment and all associated companies are committed to creating a working environment where diversity is celebrated and everyone is treated fairly, regardless of gender, gender identity, disability, ethnic origin, religion or belief, sexual orientation, marital or transgender status, age, or nationality
Senior Software Engineer South East Hybrid Up to £90k Overview Fuel Recruitment is working with a well-established technology organisation seeking a Senior Software Engineer to join their expanding team. This role offers the chance to work across modern cloud platforms, front-end frameworks, and backend languages while contributing to high-quality software solutions click apply for full job details
Mar 27, 2026
Full time
Senior Software Engineer South East Hybrid Up to £90k Overview Fuel Recruitment is working with a well-established technology organisation seeking a Senior Software Engineer to join their expanding team. This role offers the chance to work across modern cloud platforms, front-end frameworks, and backend languages while contributing to high-quality software solutions click apply for full job details
What Youll Do: Design, develop, test, and maintain high-quality mobile applications using Flutter and Dart Contribute to application architecture and technical design under senior guidance Build and maintain data-driven apps that integrate with RESTful backend services Develop responsive, performant, and accessible UI components Work with cross-functional teams to define requirements and technical click apply for full job details
Mar 27, 2026
Full time
What Youll Do: Design, develop, test, and maintain high-quality mobile applications using Flutter and Dart Contribute to application architecture and technical design under senior guidance Build and maintain data-driven apps that integrate with RESTful backend services Develop responsive, performant, and accessible UI components Work with cross-functional teams to define requirements and technical click apply for full job details
We're building AI that predicts the future. Literally. The Company Numinous is building the world's most advanced super-forecasting AI agents. We're creating autonomous systems that ingest real-world data, reason through complex scenarios, and produce predictions for the highest-stakes decisions on the planet. Think hedge funds, traders, governments, and Fortune 500 companies. Right now, we're selling predictive intelligence to hedge funds and operating in prediction markets. But that's the starting point, not the ceiling. We're a small team, early-stage, well-backed, and moving fast. Our mission: To build forecasting AI that fundamentally changes how critical decisions get made. Our Culture We operate like founders, not employees. Everyone here has skin in the game and the autonomy to make real decisions. We move fast, communicate directly, and don't hide behind process. If something needs doing, you do it. If something's broken, you say it. We value missionaries over mercenaries. We want people who care about the mission, not just the paycheque. The kind of people who'll stay up late because the problem is interesting, not because someone told them to. The Role You'll architect and build the core infrastructure of the Numinous platform. This is the backbone that allows autonomous AI agents to ingest data, reason, compete, and forecast. This isn't gluing APIs together. You'll be designing the systems that score, rank, and incentivise AI forecasting agents in live, competitive environments. Day to day, you're deep in backend architecture, building production-grade agent orchestration, designing data pipelines, and solving problems at the intersection of software engineering and quantitative forecasting. You'll work directly with the founders. There are no layers between you and the decisions that shape the product. What You'll Be Doing Unifying the different parts of the stack. The network, signal layers, and forecasting architectures need to work together as one coherent system. Designing and building the agent orchestration pipeline that allows AI forecasters to ingest data, reason, and produce predictions. Building and optimising the signal pipeline that feeds real-world data into forecasting models. Experimenting with different forecasting architectures to find optimal approaches for linking targets to signals. Writing production-grade Python that handles complexity at scale, not scripts that work in a notebook. Contributing to technical strategy alongside the founders. You'll have a voice in what gets built and why. Evaluating and vetting technical candidates as the engineering team grows. Bad News We're early. The engineering function is still being built. Documentation is thin and processes are light Priorities will shift and things will break If you need a mature engineering culture with established practices, this isn't the role yet. You'll be helping build that culture, not inheriting it. Good News More ownership, influence, and impact in 6 months than you'd get in 5 years at a bigger company Technical co-founders who are direct, move fast, and actually understand what you're building No politics, no layers, no waiting for approval The problem is genuinely unsolved and the market is enormous If we get this right, you'll have built the infrastructure behind the world's most advanced forecasting AI. Your Mission Make the Numinous platform into a self-improving world model with the most accurate forecasts in the world. You exist to turn our vision of self-improving superhuman AI forecasting into a reality, building the systems that allow agents to get smarter, faster, and more accurate over time. Why Join Now This is founding-engineer territory. The team is small, the problem is unsolved, and the market is massive. You're not joining a machine that's already running. You're building it. The architecture decisions you make in the next 6 months will define the platform for years. You'll have direct influence over the product, the technical direction, and the culture of the engineering team as it grows. In 12 months this role won't look like this. The team will be bigger, the foundations will be set, and the opportunity to shape everything from scratch will be gone. Right now, it's all open. What Good Looks Like At 3 months: There's a production-grade forecaster in one category. Targets are linked to signals, connected to the network, with experimentation underway on forecasting architectures. You're making architectural decisions independently and contributing to technical strategy, not just executing tickets. At 6 months: The signal pipeline has an inductive process, a world model sits on top, and there's a sellable product for clients. You've unified the different parts of the stack (the network, signal layers, and forecasting architectures) into something coherent and powerful. At 12 months: The platform handles complex targets across multiple verticals including commodities, politics, and beyond. There's a provable edge that unlocks serious commercial conversations. You're a technical leader in the company, not just an engineer. Skills & Expertise 5+ years building production-grade Python backends. You know the internals, not just the syntax. Hands-on experience with LLM orchestration frameworks such as LangChain or LangGraph (agent memory, tool calling, state management) Dagster in production (assets, sensors, partitions) or equivalent pipeline orchestration Strong backend fundamentals including API design, async programming, and database modelling You've built systems that had to work reliably at scale, not just pass a demo Experience 5+ years in a backend or full-stack engineering role Worked at an early-stage startup or high-growth environment. You understand the pace. Built and shipped production systems, not just prototypes Comfortable being the most senior engineer in the room, or the only one What Sets You Apart You think holistically about systems. You see how your work connects to every other part of the product without being told. Research-driven approach to problem solving. You test hypotheses, not just ship features. Experience in financial markets, algo-trading, or prediction market platforms (Polymarket, Manifold, etc.) Quantitative background in maths, statistics, or probability theory ML experience including random forests, regression models, scikit-learn, and PyTorch AWS infrastructure experience deploying containerised applications and managing cloud environments (EC2, Lambda, RDS) Open-source contributions to AI or crypto projects Compensation Salary: £80,000 to £120,000 depending on experience Equity: Competitive for the right candidate Hours & Location Full-time Remote-friendly with a presence in London Async by default, in-person when it matters We care about output, not hours logged. This is a startup, and the pace reflects that. How to Apply Apply. Submit your application through Ashby. Tell us why this role excites you and what you'd bring to it. Shortlist. We review every application and shortlist candidates for interview. Interview with TGC. A conversation with our team to walk through your experience and how you think about the problem. Interview with the founders. You'll meet the Numinous founding team directly. Task. A short, practical exercise to see how you approach real work. Offer. If it's a fit on both sides, we move fast.
Mar 27, 2026
Full time
We're building AI that predicts the future. Literally. The Company Numinous is building the world's most advanced super-forecasting AI agents. We're creating autonomous systems that ingest real-world data, reason through complex scenarios, and produce predictions for the highest-stakes decisions on the planet. Think hedge funds, traders, governments, and Fortune 500 companies. Right now, we're selling predictive intelligence to hedge funds and operating in prediction markets. But that's the starting point, not the ceiling. We're a small team, early-stage, well-backed, and moving fast. Our mission: To build forecasting AI that fundamentally changes how critical decisions get made. Our Culture We operate like founders, not employees. Everyone here has skin in the game and the autonomy to make real decisions. We move fast, communicate directly, and don't hide behind process. If something needs doing, you do it. If something's broken, you say it. We value missionaries over mercenaries. We want people who care about the mission, not just the paycheque. The kind of people who'll stay up late because the problem is interesting, not because someone told them to. The Role You'll architect and build the core infrastructure of the Numinous platform. This is the backbone that allows autonomous AI agents to ingest data, reason, compete, and forecast. This isn't gluing APIs together. You'll be designing the systems that score, rank, and incentivise AI forecasting agents in live, competitive environments. Day to day, you're deep in backend architecture, building production-grade agent orchestration, designing data pipelines, and solving problems at the intersection of software engineering and quantitative forecasting. You'll work directly with the founders. There are no layers between you and the decisions that shape the product. What You'll Be Doing Unifying the different parts of the stack. The network, signal layers, and forecasting architectures need to work together as one coherent system. Designing and building the agent orchestration pipeline that allows AI forecasters to ingest data, reason, and produce predictions. Building and optimising the signal pipeline that feeds real-world data into forecasting models. Experimenting with different forecasting architectures to find optimal approaches for linking targets to signals. Writing production-grade Python that handles complexity at scale, not scripts that work in a notebook. Contributing to technical strategy alongside the founders. You'll have a voice in what gets built and why. Evaluating and vetting technical candidates as the engineering team grows. Bad News We're early. The engineering function is still being built. Documentation is thin and processes are light Priorities will shift and things will break If you need a mature engineering culture with established practices, this isn't the role yet. You'll be helping build that culture, not inheriting it. Good News More ownership, influence, and impact in 6 months than you'd get in 5 years at a bigger company Technical co-founders who are direct, move fast, and actually understand what you're building No politics, no layers, no waiting for approval The problem is genuinely unsolved and the market is enormous If we get this right, you'll have built the infrastructure behind the world's most advanced forecasting AI. Your Mission Make the Numinous platform into a self-improving world model with the most accurate forecasts in the world. You exist to turn our vision of self-improving superhuman AI forecasting into a reality, building the systems that allow agents to get smarter, faster, and more accurate over time. Why Join Now This is founding-engineer territory. The team is small, the problem is unsolved, and the market is massive. You're not joining a machine that's already running. You're building it. The architecture decisions you make in the next 6 months will define the platform for years. You'll have direct influence over the product, the technical direction, and the culture of the engineering team as it grows. In 12 months this role won't look like this. The team will be bigger, the foundations will be set, and the opportunity to shape everything from scratch will be gone. Right now, it's all open. What Good Looks Like At 3 months: There's a production-grade forecaster in one category. Targets are linked to signals, connected to the network, with experimentation underway on forecasting architectures. You're making architectural decisions independently and contributing to technical strategy, not just executing tickets. At 6 months: The signal pipeline has an inductive process, a world model sits on top, and there's a sellable product for clients. You've unified the different parts of the stack (the network, signal layers, and forecasting architectures) into something coherent and powerful. At 12 months: The platform handles complex targets across multiple verticals including commodities, politics, and beyond. There's a provable edge that unlocks serious commercial conversations. You're a technical leader in the company, not just an engineer. Skills & Expertise 5+ years building production-grade Python backends. You know the internals, not just the syntax. Hands-on experience with LLM orchestration frameworks such as LangChain or LangGraph (agent memory, tool calling, state management) Dagster in production (assets, sensors, partitions) or equivalent pipeline orchestration Strong backend fundamentals including API design, async programming, and database modelling You've built systems that had to work reliably at scale, not just pass a demo Experience 5+ years in a backend or full-stack engineering role Worked at an early-stage startup or high-growth environment. You understand the pace. Built and shipped production systems, not just prototypes Comfortable being the most senior engineer in the room, or the only one What Sets You Apart You think holistically about systems. You see how your work connects to every other part of the product without being told. Research-driven approach to problem solving. You test hypotheses, not just ship features. Experience in financial markets, algo-trading, or prediction market platforms (Polymarket, Manifold, etc.) Quantitative background in maths, statistics, or probability theory ML experience including random forests, regression models, scikit-learn, and PyTorch AWS infrastructure experience deploying containerised applications and managing cloud environments (EC2, Lambda, RDS) Open-source contributions to AI or crypto projects Compensation Salary: £80,000 to £120,000 depending on experience Equity: Competitive for the right candidate Hours & Location Full-time Remote-friendly with a presence in London Async by default, in-person when it matters We care about output, not hours logged. This is a startup, and the pace reflects that. How to Apply Apply. Submit your application through Ashby. Tell us why this role excites you and what you'd bring to it. Shortlist. We review every application and shortlist candidates for interview. Interview with TGC. A conversation with our team to walk through your experience and how you think about the problem. Interview with the founders. You'll meet the Numinous founding team directly. Task. A short, practical exercise to see how you approach real work. Offer. If it's a fit on both sides, we move fast.
Backend Software Engineer / Developer (Python FastAPI SQL IaC) London to £95k Are you a data centric Backend Software Engineer with strong Python, SQL and FastAPI skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses on developing a complex SaaS calculation platform for rapidly growing Cyber Security click apply for full job details
Mar 27, 2026
Full time
Backend Software Engineer / Developer (Python FastAPI SQL IaC) London to £95k Are you a data centric Backend Software Engineer with strong Python, SQL and FastAPI skills? You could be progressing your career in a senior, hands-on role at a fast growing, global Insurance Underwriting technology provider that focusses on developing a complex SaaS calculation platform for rapidly growing Cyber Security click apply for full job details
Picture your next role as a Senior Backend Developer You walk into a team where most developers stayed for years. People know the platform, trust each other, and care about the work. No chaos. No constant churn. A steady engineering team that builds solid software. You focus on backend engineering. C#, .NET, Azure. You work on cloud systems that run across the business. The team improves platforms, builds new services, and keeps raising the standard. Senior developers here solve problems, share knowledge, and take ownership of the platform. Your role: Build backend services using C# and .NET Develop APIs and system integrations Deploy and run services in Azure Improve performance and reliability across the platform Contribute to CI/CD and automation Work with engineers, product managers, and UX Why Developers stay there: Chance to work with experienced developers who care about quality Contribute to real improvements across production systems Stable environment with long serving engineers 34 hour working week Quick Interview process, 2 stage interview. If you want a stable engineering team, strong technical work, and space to grow as a backend developer, apply now . Senior .NET Backend Developer, C#, .NET, Azure, Winsford, 1 day in office, Salary up to 75,000
Mar 26, 2026
Full time
Picture your next role as a Senior Backend Developer You walk into a team where most developers stayed for years. People know the platform, trust each other, and care about the work. No chaos. No constant churn. A steady engineering team that builds solid software. You focus on backend engineering. C#, .NET, Azure. You work on cloud systems that run across the business. The team improves platforms, builds new services, and keeps raising the standard. Senior developers here solve problems, share knowledge, and take ownership of the platform. Your role: Build backend services using C# and .NET Develop APIs and system integrations Deploy and run services in Azure Improve performance and reliability across the platform Contribute to CI/CD and automation Work with engineers, product managers, and UX Why Developers stay there: Chance to work with experienced developers who care about quality Contribute to real improvements across production systems Stable environment with long serving engineers 34 hour working week Quick Interview process, 2 stage interview. If you want a stable engineering team, strong technical work, and space to grow as a backend developer, apply now . Senior .NET Backend Developer, C#, .NET, Azure, Winsford, 1 day in office, Salary up to 75,000
Location : Hybrid - UK Contract Type: Permanent Hours : Full time Salary : Competitive COMPANY OVERVIEW MOBKOI is a fast-growing mobile company headquartered in London, with offices across central Europe, US and Asia. We use the latest in mobile ad technology to help premium brands effectively reach and engage with their clients' audiences.Bringing to market the most selective site list of premium global and local publishers enabling brands to be selective of where their ads are going to run and thus ensuring brand safety. MOBKOI prides itself on offering full transparency, bespoke creative builds and local market coordination. We are part of The Brandtech Group, formerly known as You & Mr Jones, working with partners developing the best technology across the globe. ROLE OVERVIEW As a Backend Software Engineer (Junior-Mid Level) - Programmatic, you will contribute to the development and evolution of MOBKOI's programmatic advertising platform. You will work closely with experienced engineers on backend systems that power real-time bidding (RTB), campaign delivery, and large-scale integrations with SSPs and DSPs.This role is well suited to engineers early in their career who want to deepen their expertise in distributed systems, low-latency services, and cloud-based infrastructure, while gaining exposure to the programmatic advertising ecosystem. You will be supported through mentorship, code reviews, and progressive ownership of backend components. RESPONSIBILITIES • Contribute to the development and improvement of MOBKOI's programmatic backend systems, including components of the real-time bidding (RTB) pipeline.• Support the design and implementation of scalable, reliable, and high-performance services handling large volumes of traffic.• Work alongside senior engineers to help evolve system architecture while balancing performance, cost efficiency, and reliability.• Assist in monitoring system performance and contribute to initiatives that optimise infrastructure usage and operational cost.• Participate in diagnosing and resolving issues related to distributed systems, including latency, availability, and scaling challenges.• Implement backend components following best practices in fault tolerance, load balancing, and resilient design.• Develop an understanding of the programmatic advertising ecosystem, including SSPs, DSPs, bidding flows, and ad exchanges.• Contribute to discussions around technology selection, tooling, and build-vs-buy decisions.• Collaborate with product, data, and business teams to ensure technical solutions align with business needs.• Actively participate in code reviews, technical discussions, and continuous improvement initiatives. KEY SKILLS & COMPETENCIES • Experience in backend software development, gained through a first professional role, internship, or apprenticeship.• Solid engineering fundamentals with Go (or another backend language with a strong willingness to learn Go).• Interest in or exposure to distributed systems and high-traffic environments.• Understanding of core concepts around scalability, reliability, and high availability.• Familiarity with cloud platforms such as AWS or GCP.• Awareness of cost-efficient engineering practices and infrastructure optimisation.• Curiosity about the programmatic advertising landscape and how technical systems support business outcomes.• Strong collaboration skills and the ability to communicate clearly within a cross-functional team. BEHAVIOURS This role operates in a fast-moving, high-standards environment and requires someone who is motivated to learn, take ownership, and deliver quality work. The role holder is expected to manage their time effectively, adapt to change, and contribute positively to team and business outcomes.The role offers autonomy and is suited to someone who is comfortable balancing independent work with cross-functional collaboration. What we're looking for: • Motivation to contribute to the growth and success of the business• A proactive, adaptable mindset with the ability to learn quickly• Strong ownership and accountability for outcomes• Clear and professional communication with a range of stakeholdersYou may also have experience in the following: Backend Software Engineer, Junior Backend Engineer, Mid-Level Backend Developer, Go Developer (Golang Engineer), Software Engineer - Backend, Programmatic Engineer, AdTech Engineer, RTB Engineer (Real-Time Bidding Engineer), Distributed Systems Engineer, Cloud Backend Engineer (AWS / GCP), Platform Engineer - AdTech, API Developer (Backend), High-Performance Systems Engineer, Programmatic Advertising Developer, Software Engineer - AdTechREF-
Mar 25, 2026
Full time
Location : Hybrid - UK Contract Type: Permanent Hours : Full time Salary : Competitive COMPANY OVERVIEW MOBKOI is a fast-growing mobile company headquartered in London, with offices across central Europe, US and Asia. We use the latest in mobile ad technology to help premium brands effectively reach and engage with their clients' audiences.Bringing to market the most selective site list of premium global and local publishers enabling brands to be selective of where their ads are going to run and thus ensuring brand safety. MOBKOI prides itself on offering full transparency, bespoke creative builds and local market coordination. We are part of The Brandtech Group, formerly known as You & Mr Jones, working with partners developing the best technology across the globe. ROLE OVERVIEW As a Backend Software Engineer (Junior-Mid Level) - Programmatic, you will contribute to the development and evolution of MOBKOI's programmatic advertising platform. You will work closely with experienced engineers on backend systems that power real-time bidding (RTB), campaign delivery, and large-scale integrations with SSPs and DSPs.This role is well suited to engineers early in their career who want to deepen their expertise in distributed systems, low-latency services, and cloud-based infrastructure, while gaining exposure to the programmatic advertising ecosystem. You will be supported through mentorship, code reviews, and progressive ownership of backend components. RESPONSIBILITIES • Contribute to the development and improvement of MOBKOI's programmatic backend systems, including components of the real-time bidding (RTB) pipeline.• Support the design and implementation of scalable, reliable, and high-performance services handling large volumes of traffic.• Work alongside senior engineers to help evolve system architecture while balancing performance, cost efficiency, and reliability.• Assist in monitoring system performance and contribute to initiatives that optimise infrastructure usage and operational cost.• Participate in diagnosing and resolving issues related to distributed systems, including latency, availability, and scaling challenges.• Implement backend components following best practices in fault tolerance, load balancing, and resilient design.• Develop an understanding of the programmatic advertising ecosystem, including SSPs, DSPs, bidding flows, and ad exchanges.• Contribute to discussions around technology selection, tooling, and build-vs-buy decisions.• Collaborate with product, data, and business teams to ensure technical solutions align with business needs.• Actively participate in code reviews, technical discussions, and continuous improvement initiatives. KEY SKILLS & COMPETENCIES • Experience in backend software development, gained through a first professional role, internship, or apprenticeship.• Solid engineering fundamentals with Go (or another backend language with a strong willingness to learn Go).• Interest in or exposure to distributed systems and high-traffic environments.• Understanding of core concepts around scalability, reliability, and high availability.• Familiarity with cloud platforms such as AWS or GCP.• Awareness of cost-efficient engineering practices and infrastructure optimisation.• Curiosity about the programmatic advertising landscape and how technical systems support business outcomes.• Strong collaboration skills and the ability to communicate clearly within a cross-functional team. BEHAVIOURS This role operates in a fast-moving, high-standards environment and requires someone who is motivated to learn, take ownership, and deliver quality work. The role holder is expected to manage their time effectively, adapt to change, and contribute positively to team and business outcomes.The role offers autonomy and is suited to someone who is comfortable balancing independent work with cross-functional collaboration. What we're looking for: • Motivation to contribute to the growth and success of the business• A proactive, adaptable mindset with the ability to learn quickly• Strong ownership and accountability for outcomes• Clear and professional communication with a range of stakeholdersYou may also have experience in the following: Backend Software Engineer, Junior Backend Engineer, Mid-Level Backend Developer, Go Developer (Golang Engineer), Software Engineer - Backend, Programmatic Engineer, AdTech Engineer, RTB Engineer (Real-Time Bidding Engineer), Distributed Systems Engineer, Cloud Backend Engineer (AWS / GCP), Platform Engineer - AdTech, API Developer (Backend), High-Performance Systems Engineer, Programmatic Advertising Developer, Software Engineer - AdTechREF-
ABOUT THE COMPANY Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications. LOCATION Infleqtion has offices in the USA, United Kingdom and Australia. This is a full-time position in our Kidlington and Harwell offices. Our flexible working policy enables all full-time employees to work up to 2 days a week from home as work permits. POSITION SUMMARY Infleqtion is seeking a Senior Research Software Engineer to architect and develop software across the full quantum control stack, enabling high-performance operation of both quantum computers and quantum sensors. This role spans low-level hardware integration, real-time control systems, waveform generation, calibration automation, experiment orchestration, and scalable data pipelines. You will work at the boundary between physics and production software, partnering with physicists and hardware engineers to translate experimental requirements into robust, deterministic, and extensible control infrastructure. The ideal candidate brings deep systems programming expertise, experience with hardware-adjacent or real-time systems, and a strong foundation in scientific or high-performance computing, with a passion for building the core software that drives next-generation quantum technologies. JOB RESPONSIBILITIES The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time. Design, develop, and deploy reliable, maintainable, scalable, and fault-tolerant backend services and frameworks that control and calibrate our quantum hardware. Collaborate with interdisciplinary teams, including scientists, opto-mechanical engineers, and electrical engineers, to solve complex problems and deliver high-quality software solutions. Empower interdisciplinary teams to create the tools they need by teaching engineering and programming best practices. Mentor and guide junior engineers, fostering their growth and enhancing the team's technical expertise. Lead code and design reviews, upholding engineering best practices and promoting a culture of quality and collaboration. Support and debug all layers of the control stack from real-time embedded kernels to distributed and cloud-based services. Advocate for and implement innovative software development methodologies and tools to improve team efficiency and product quality. Bachelor's degree in Engineering, Applied Mathematics, Physics or related field and a minimum of 5 years prior work experience in a scientific domain. Experience with Python and at least one compiled language, with a desire to learn and work in Rust. Experience with Linux and virtualization technologies like Docker. Good verbal and written communication skills, able to effectively share information with technical and non-technical staff. Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance. Skilled in typical software engineering disciplines: testing, debugging, version control, error-handling, readability, documentation, general code health, etc. Desire to constantly improve and learn inside and outside of expertise Desirable Skills or Knowledge Domain-specific experience in statistics, machine learning, or AMO physics. Experience with Numpy, Scipy, and Pytorch. Experience with image analysis, emphasis on realtime object detection. Experience with databases (relational and non-relational) including but not limited to timeseries data, SQL, and ETL processes. Experience creating and maintaining CI/CD pipelines, and Python package creation with C or Rust extensions. Experince developing basic GUIs and/or web front-end applications. EQUAL OPPORTUNITY Regardless of your interest in the quantum industry, you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products, driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements, women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but don't meet every single point in our job advertisement, please don't hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture, actively contribute, and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin colour, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer. In addition to your base compensation, we offer a generous Total Rewards program which includes: Competitive salary Incentive Stock Option Plan Generous company 10% pension contribution regardless of employee contribution Unlimited PTO BUPA healthcare after probation period Cycle to work and Technology scheme
Mar 24, 2026
Full time
ABOUT THE COMPANY Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications. LOCATION Infleqtion has offices in the USA, United Kingdom and Australia. This is a full-time position in our Kidlington and Harwell offices. Our flexible working policy enables all full-time employees to work up to 2 days a week from home as work permits. POSITION SUMMARY Infleqtion is seeking a Senior Research Software Engineer to architect and develop software across the full quantum control stack, enabling high-performance operation of both quantum computers and quantum sensors. This role spans low-level hardware integration, real-time control systems, waveform generation, calibration automation, experiment orchestration, and scalable data pipelines. You will work at the boundary between physics and production software, partnering with physicists and hardware engineers to translate experimental requirements into robust, deterministic, and extensible control infrastructure. The ideal candidate brings deep systems programming expertise, experience with hardware-adjacent or real-time systems, and a strong foundation in scientific or high-performance computing, with a passion for building the core software that drives next-generation quantum technologies. JOB RESPONSIBILITIES The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time. Design, develop, and deploy reliable, maintainable, scalable, and fault-tolerant backend services and frameworks that control and calibrate our quantum hardware. Collaborate with interdisciplinary teams, including scientists, opto-mechanical engineers, and electrical engineers, to solve complex problems and deliver high-quality software solutions. Empower interdisciplinary teams to create the tools they need by teaching engineering and programming best practices. Mentor and guide junior engineers, fostering their growth and enhancing the team's technical expertise. Lead code and design reviews, upholding engineering best practices and promoting a culture of quality and collaboration. Support and debug all layers of the control stack from real-time embedded kernels to distributed and cloud-based services. Advocate for and implement innovative software development methodologies and tools to improve team efficiency and product quality. Bachelor's degree in Engineering, Applied Mathematics, Physics or related field and a minimum of 5 years prior work experience in a scientific domain. Experience with Python and at least one compiled language, with a desire to learn and work in Rust. Experience with Linux and virtualization technologies like Docker. Good verbal and written communication skills, able to effectively share information with technical and non-technical staff. Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance. Skilled in typical software engineering disciplines: testing, debugging, version control, error-handling, readability, documentation, general code health, etc. Desire to constantly improve and learn inside and outside of expertise Desirable Skills or Knowledge Domain-specific experience in statistics, machine learning, or AMO physics. Experience with Numpy, Scipy, and Pytorch. Experience with image analysis, emphasis on realtime object detection. Experience with databases (relational and non-relational) including but not limited to timeseries data, SQL, and ETL processes. Experience creating and maintaining CI/CD pipelines, and Python package creation with C or Rust extensions. Experince developing basic GUIs and/or web front-end applications. EQUAL OPPORTUNITY Regardless of your interest in the quantum industry, you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products, driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements, women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but don't meet every single point in our job advertisement, please don't hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture, actively contribute, and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin colour, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer. In addition to your base compensation, we offer a generous Total Rewards program which includes: Competitive salary Incentive Stock Option Plan Generous company 10% pension contribution regardless of employee contribution Unlimited PTO BUPA healthcare after probation period Cycle to work and Technology scheme
Full Stack Technical Lead - Remote - £65k-£70k (DOE) I'm working with an exciting organisation that is looking for a Full Stack Technical Lead to take ownership of modern cloud-based applications and lead development within a defined architectural framework. This is an excellent opportunity for a senior full-stack engineer who enjoys remaining hands-on while influencing architecture, enforcing engineering standards, and driving secure development practices across a high-performing team. Key Responsibilities You will be responsible for: Designing and developing scalable backend services using .NET 10.0.2 and ASP.NET Core Web APIs Building and maintaining Angular 21 front-end applications using DevExpress DevExtreme v25 components Leading secure, Azure-native cloud implementations Building and maintaining Infrastructure as Code using Bicep Implementing authentication and role-based access via Azure Entra ID Integrating Azure Key Vault for secure secret management across environments Writing and maintaining unit and integration tests (NUnit and ViTest) Ensuring all development aligns with OWASP secure coding standards Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Collaborating with UI/UX teams using Figma prototypes Maintaining high-quality technical documentation Tech Stack & Experience Core technologies: .NET 10 / ASP.NET Core Entity Framework Core RESTful API design / OpenAPI / Swagger Angular 21 (mandatory) TypeScript / RxJS DevExpress DevExtreme v25 (mandatory) Microsoft Azure (App Services, SQL, Storage) Azure Entra ID Azure Key Vault Infrastructure as Code (Bicep preferred) CI/CD pipelines (Azure DevOps or equivalent) Bitbucket (Git) What They're Looking For 7+ years' commercial software engineering experience 2+ years operating as a Technical Lead Strong full-stack expertise within the Microsoft ecosystem Proven experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Strong understanding of secure enterprise application development Experience working in regulated or security-sensitive environments Solid grasp of RESTful API design and authentication patterns Ability to balance hands-on delivery with technical leadership responsibilities Desirable Experience Multi-environment Azure architecture design Angular performance optimisation Designing role-based access control systems Cloud cost optimisation practices Exposure to penetration testing and secure SDLC processes Experience contributing to architectural decision-making Salary & Benefits £65k-£70k (depending on experience) Remote working Structured architecture standards and modern tooling Exposure to enterprise-scale Azure environments Opportunity to influence engineering best practice and security standards Why This Role? This is a standout opportunity for a technical leader who wants real ownership of architecture, cloud infrastructure, and development standards - while staying close to the code. You'll join a technically mature environment where automation, security, and scalability are core priorities, not afterthoughts. If you're open to a confidential discussion, apply now and I'll be in touch. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.
Mar 24, 2026
Full time
Full Stack Technical Lead - Remote - £65k-£70k (DOE) I'm working with an exciting organisation that is looking for a Full Stack Technical Lead to take ownership of modern cloud-based applications and lead development within a defined architectural framework. This is an excellent opportunity for a senior full-stack engineer who enjoys remaining hands-on while influencing architecture, enforcing engineering standards, and driving secure development practices across a high-performing team. Key Responsibilities You will be responsible for: Designing and developing scalable backend services using .NET 10.0.2 and ASP.NET Core Web APIs Building and maintaining Angular 21 front-end applications using DevExpress DevExtreme v25 components Leading secure, Azure-native cloud implementations Building and maintaining Infrastructure as Code using Bicep Implementing authentication and role-based access via Azure Entra ID Integrating Azure Key Vault for secure secret management across environments Writing and maintaining unit and integration tests (NUnit and ViTest) Ensuring all development aligns with OWASP secure coding standards Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Collaborating with UI/UX teams using Figma prototypes Maintaining high-quality technical documentation Tech Stack & Experience Core technologies: .NET 10 / ASP.NET Core Entity Framework Core RESTful API design / OpenAPI / Swagger Angular 21 (mandatory) TypeScript / RxJS DevExpress DevExtreme v25 (mandatory) Microsoft Azure (App Services, SQL, Storage) Azure Entra ID Azure Key Vault Infrastructure as Code (Bicep preferred) CI/CD pipelines (Azure DevOps or equivalent) Bitbucket (Git) What They're Looking For 7+ years' commercial software engineering experience 2+ years operating as a Technical Lead Strong full-stack expertise within the Microsoft ecosystem Proven experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Strong understanding of secure enterprise application development Experience working in regulated or security-sensitive environments Solid grasp of RESTful API design and authentication patterns Ability to balance hands-on delivery with technical leadership responsibilities Desirable Experience Multi-environment Azure architecture design Angular performance optimisation Designing role-based access control systems Cloud cost optimisation practices Exposure to penetration testing and secure SDLC processes Experience contributing to architectural decision-making Salary & Benefits £65k-£70k (depending on experience) Remote working Structured architecture standards and modern tooling Exposure to enterprise-scale Azure environments Opportunity to influence engineering best practice and security standards Why This Role? This is a standout opportunity for a technical leader who wants real ownership of architecture, cloud infrastructure, and development standards - while staying close to the code. You'll join a technically mature environment where automation, security, and scalability are core priorities, not afterthoughts. If you're open to a confidential discussion, apply now and I'll be in touch. Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy. To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.
Applied AI Engineer London (hybrid, three days per week onsite).Competitive salary between £140,000 and £150,000. This is an exciting opportunity to join an elite AI product team operating with the pace of a startup and the scale of a major software group. You will build production AI systems end to end, deploy into real customer environments, and accelerate your learning faster than almost anywhere else in the market. The Company They are an AI product incubator embedded within a large, well-established B2B software investment environment. Their mission is to partner with portfolio companies to design, build, and ship AI products that have immediate commercial impact. Working in focused sprints, they deliver production systems into businesses across fintech, enterprise SaaS, and B2B services. The team is deliberately small, high-performing, and structured to give engineers real ownership from day one. The Role Build full-stack, production AI applications from first architecture through to customer-facing delivery. Develop backend, infrastructure, and frontend components using Python, FastAPI, React, TypeScript, and cloud platforms. Deploy GenAI and LLM-based systems, including evaluation, observability, and agent-based workflows. Operate in cross-functional pods embedded into portfolio companies, typically for multi-month build cycles. Work with technical and commercial leaders to define product direction and ship quickly in high-velocity environments. Translate complex AI capabilities into scalable, reliable, revenue-generating products. Your Skills and Experience Strong commercial experience delivering end-to-end AI products into production environments. Broad engineering capability across backend, cloud infrastructure, and frontend development. Hands-on experience with GenAI, LLM deployment, and production-grade ML tooling. Comfortable working in ambiguous, fast-moving settings such as startups or high-intensity engineering teams. Confident communicating with both technical and non-technical stakeholders, including senior leadership. A proactive, 0-to-1 mindset with the ability to set direction rather than wait for specifications. What They Offer Competitive base salary. Meaningful carry and long-term upside. Hybrid working across London or New York, with flexibility to engage with portfolio teams. Significant ownership, rapid progression, and direct exposure to C-Suite stakeholders. The opportunity to build multiple AI products across different industries, accelerating your development in a way few roles can match. How to Apply If you are excited by the chance to build real AI products at scale, please apply with your CV.
Mar 21, 2026
Full time
Applied AI Engineer London (hybrid, three days per week onsite).Competitive salary between £140,000 and £150,000. This is an exciting opportunity to join an elite AI product team operating with the pace of a startup and the scale of a major software group. You will build production AI systems end to end, deploy into real customer environments, and accelerate your learning faster than almost anywhere else in the market. The Company They are an AI product incubator embedded within a large, well-established B2B software investment environment. Their mission is to partner with portfolio companies to design, build, and ship AI products that have immediate commercial impact. Working in focused sprints, they deliver production systems into businesses across fintech, enterprise SaaS, and B2B services. The team is deliberately small, high-performing, and structured to give engineers real ownership from day one. The Role Build full-stack, production AI applications from first architecture through to customer-facing delivery. Develop backend, infrastructure, and frontend components using Python, FastAPI, React, TypeScript, and cloud platforms. Deploy GenAI and LLM-based systems, including evaluation, observability, and agent-based workflows. Operate in cross-functional pods embedded into portfolio companies, typically for multi-month build cycles. Work with technical and commercial leaders to define product direction and ship quickly in high-velocity environments. Translate complex AI capabilities into scalable, reliable, revenue-generating products. Your Skills and Experience Strong commercial experience delivering end-to-end AI products into production environments. Broad engineering capability across backend, cloud infrastructure, and frontend development. Hands-on experience with GenAI, LLM deployment, and production-grade ML tooling. Comfortable working in ambiguous, fast-moving settings such as startups or high-intensity engineering teams. Confident communicating with both technical and non-technical stakeholders, including senior leadership. A proactive, 0-to-1 mindset with the ability to set direction rather than wait for specifications. What They Offer Competitive base salary. Meaningful carry and long-term upside. Hybrid working across London or New York, with flexibility to engage with portfolio teams. Significant ownership, rapid progression, and direct exposure to C-Suite stakeholders. The opportunity to build multiple AI products across different industries, accelerating your development in a way few roles can match. How to Apply If you are excited by the chance to build real AI products at scale, please apply with your CV.
ABOUT THE COMPANY Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications. LOCATION Infleqtion has offices in the USA, United Kingdom and Australia. This is a full time position in our Kidlington and Harwell offices. Our flexible working policy enables all full time employees to work up to 2 days a week from home as work permits. POSITION SUMMARY Infleqtion is seeking a Senior Cloud Backend Software Engineer to design and build scalable backend services that power both internal platform infrastructure and externally facing systems for our quantum technologies. This role focuses on developing cloud native microservice architectures, distributed APIs, and reliable backend systems that support experiment orchestration, data pipelines, device control workflows, and internal developer platforms. You will build and operate services that form the backbone of our quantum software platform, enabling scientists, engineers, and external users to interact with quantum hardware and experimentation workflows through robust, scalable infrastructure. The ideal candidate is comfortable building API driven services, asynchronous systems, and scalable data infrastructure deployed in containerised and orchestrated cloud environments. JOB RESPONSIBILITIES The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time. Design, develop, and operate cloud native backend services and microservice architectures supporting both internal engineering platforms and externally accessible APIs. Build Python based backend systems using modern frameworks such as FastAPI and SQLAlchemy to implement scalable, maintainable services. Architect and implement distributed systems that support experiment orchestration, telemetry collection, data ingestion, and device interaction workflows. Design backend systems with strong focus on reliability, scalability, observability, and fault tolerance, including monitoring, logging, tracing, and graceful degradation. Deploy and operate services using Docker containers, local development environments with Docker Compose, and production orchestration using Kubernetes. Collaborate with interdisciplinary teams including physicists, hardware engineers, and research scientists to translate experimental workflows into scalable software systems. Mentor junior engineers and promote best practices in backend architecture, distributed systems design, reliability engineering, and software development. Lead architecture discussions, design reviews, and code reviews to maintain high engineering standards and system maintainability. Contribute to platform reliability and operational excellence, diagnosing production issues, improving system performance, and strengthening infrastructure resilience. Bachelor's degree in Computer Science, Engineering, Applied Mathematics, Physics, or related field with 3+ years of professional software engineering experience. Strong experience developing backend systems in Python, particularly using modern frameworks such as FastAPI, SQLAlchemy, or similar tools. Experience designing and implementing and deploying distributed systems or microservice architectures, using tools including Docker, Docker Compose & Kubernetes. Experience designing systems for reliability, scalability, and operational robustness and using CI/CD pipelines, automated testing infrastructure, and deployment automation. Strong understanding of software engineering best practices, including testing, version control, debugging, observability, documentation, and maintainability. Strong communication and collaboration skills, with the ability to work effectively across interdisciplinary teams. Desirable Skills or Knowledge Experience building distributed systems in cloud environments (AWS, GCP, Azure, or similar). Experience with message queues and event driven architectures (e.g., Kafka, RabbitMQ, NATS, or similar). Experience with database systems and data infrastructure, including relational databases, time series databases, and large scale data pipelines. Experience building Python packages with native extensions (Rust/C/C++). EQUAL OPPORTUNITY Regardless of your interest in the quantum industry, you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products, driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements, women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but don't meet every single point in our job advertisement, please don't hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture, actively contribute, and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin colour, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer. In addition to your base compensation, we offer a generous Total Rewards program which includes: Competitive salary Incentive Stock Option Plan Generous company 10% pension contribution regardless of employee contribution Unlimited PTO BUPA healthcare after probation period Cycle to work and Technology scheme
Mar 20, 2026
Full time
ABOUT THE COMPANY Infleqtion is a global quantum technology company solving the world's most challenging problems. The company harnesses quantum mechanics to build and integrate quantum computers, sensors, and networks. From fundamental physics to leading edge commercial products, Infleqtion enables "quantum everywhere" through our ecosystem of devices and platforms. Our mission is to commercialise atom-based quantum products that provide orders of magnitude improvements in performance and computing applications. LOCATION Infleqtion has offices in the USA, United Kingdom and Australia. This is a full time position in our Kidlington and Harwell offices. Our flexible working policy enables all full time employees to work up to 2 days a week from home as work permits. POSITION SUMMARY Infleqtion is seeking a Senior Cloud Backend Software Engineer to design and build scalable backend services that power both internal platform infrastructure and externally facing systems for our quantum technologies. This role focuses on developing cloud native microservice architectures, distributed APIs, and reliable backend systems that support experiment orchestration, data pipelines, device control workflows, and internal developer platforms. You will build and operate services that form the backbone of our quantum software platform, enabling scientists, engineers, and external users to interact with quantum hardware and experimentation workflows through robust, scalable infrastructure. The ideal candidate is comfortable building API driven services, asynchronous systems, and scalable data infrastructure deployed in containerised and orchestrated cloud environments. JOB RESPONSIBILITIES The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time. Design, develop, and operate cloud native backend services and microservice architectures supporting both internal engineering platforms and externally accessible APIs. Build Python based backend systems using modern frameworks such as FastAPI and SQLAlchemy to implement scalable, maintainable services. Architect and implement distributed systems that support experiment orchestration, telemetry collection, data ingestion, and device interaction workflows. Design backend systems with strong focus on reliability, scalability, observability, and fault tolerance, including monitoring, logging, tracing, and graceful degradation. Deploy and operate services using Docker containers, local development environments with Docker Compose, and production orchestration using Kubernetes. Collaborate with interdisciplinary teams including physicists, hardware engineers, and research scientists to translate experimental workflows into scalable software systems. Mentor junior engineers and promote best practices in backend architecture, distributed systems design, reliability engineering, and software development. Lead architecture discussions, design reviews, and code reviews to maintain high engineering standards and system maintainability. Contribute to platform reliability and operational excellence, diagnosing production issues, improving system performance, and strengthening infrastructure resilience. Bachelor's degree in Computer Science, Engineering, Applied Mathematics, Physics, or related field with 3+ years of professional software engineering experience. Strong experience developing backend systems in Python, particularly using modern frameworks such as FastAPI, SQLAlchemy, or similar tools. Experience designing and implementing and deploying distributed systems or microservice architectures, using tools including Docker, Docker Compose & Kubernetes. Experience designing systems for reliability, scalability, and operational robustness and using CI/CD pipelines, automated testing infrastructure, and deployment automation. Strong understanding of software engineering best practices, including testing, version control, debugging, observability, documentation, and maintainability. Strong communication and collaboration skills, with the ability to work effectively across interdisciplinary teams. Desirable Skills or Knowledge Experience building distributed systems in cloud environments (AWS, GCP, Azure, or similar). Experience with message queues and event driven architectures (e.g., Kafka, RabbitMQ, NATS, or similar). Experience with database systems and data infrastructure, including relational databases, time series databases, and large scale data pipelines. Experience building Python packages with native extensions (Rust/C/C++). EQUAL OPPORTUNITY Regardless of your interest in the quantum industry, you can take pride in the fact that Infleqtion is building an ecosystem of quantum technologies and commercial products, driving the industry towards the future. Studies reveal that while men apply for jobs when they meet an average of 60% of the requirements, women and other groups tend to apply only when they meet all the criteria. If you believe you have the potential but don't meet every single point in our job advertisement, please don't hesitate to contact us! We would love to chat with you and see how you could bring great value to our team. Our goal is to find exceptional individuals who can enrich our team culture, actively contribute, and have a genuine passion for their work. Here you have freedom to embrace your whole self: who you love, your gender identity and expression, skin colour, age, appearance, disability, neurodiversity, DNA, military/veteran status, citizenship, and other factors that make up who you are. Your uniqueness is valued, welcomed, and appreciated here. We are dedicated to providing a positive workplace and base all employment decisions on your qualifications, performance, merits, as well as business needs. We are proud to be an Equal Employment Opportunity Employer. In addition to your base compensation, we offer a generous Total Rewards program which includes: Competitive salary Incentive Stock Option Plan Generous company 10% pension contribution regardless of employee contribution Unlimited PTO BUPA healthcare after probation period Cycle to work and Technology scheme
Location: Tring (Predominately onsite with flex where project allows) Duration: 4-6 month contract IR35: Outside IR35 Role detaills: Our client, a leading entity in the Defence & Security sector, is seeking a highly motivated Senior Software Engineer to join them on a contract basis - The role will encompass the design and development of a web-based control and monitoring dashboard application for an antenna terminal system. Key Responsibilities: Design and develop a web-based control and monitoring dashboard application for an antenna terminal system. Engage in the full design life cycle from specifications generation to thorough regression testing of pre-production units. Build and maintain React/Next.js frontend applications and NestJS backend services within a shared pnpm monorepo environment. Integrate user-facing components with backend services using various communication protocols (REST, WebSockets, SNMP, MQTT, etc.). Develop the GUI using a mix of off-the-shelf UI components and custom modules. Ensure the UI code is well-structured, scalable, and testable, conforming to UX/architecture guidelines. Ensure compliance with modern accessibility standards and usability best practices across browsers and devices. Contribute to software architecture, project planning, and specification documentation. Job Requirements: Proficiency in frontend technologies including HTML5, CSS3, JavaScript, TypeScript, React, and Next.js. Experience with backend services using NestJS and related TypeScript tooling. Understanding of various communication protocols like TCP/IP, HTTP, and SNMP. Experience with containerization tools such as Docker. Ability to design, implement, integrate, and verify software applications on Linux and Windows OS. Proven product development experience from concept through deployment. Familiarity with networked applications that require low-latency and high-availability. Preferred Experience: Knowledge of communication systems design. Understanding of various communication protocols, including RS-232, I2C, CAN, SPI, USB, TCP, and UDP over IP. Familiarity with databases, web servers (e.g. Apache), and UI/UX design. Interested? Apply today via the link provided!
Mar 19, 2026
Contractor
Location: Tring (Predominately onsite with flex where project allows) Duration: 4-6 month contract IR35: Outside IR35 Role detaills: Our client, a leading entity in the Defence & Security sector, is seeking a highly motivated Senior Software Engineer to join them on a contract basis - The role will encompass the design and development of a web-based control and monitoring dashboard application for an antenna terminal system. Key Responsibilities: Design and develop a web-based control and monitoring dashboard application for an antenna terminal system. Engage in the full design life cycle from specifications generation to thorough regression testing of pre-production units. Build and maintain React/Next.js frontend applications and NestJS backend services within a shared pnpm monorepo environment. Integrate user-facing components with backend services using various communication protocols (REST, WebSockets, SNMP, MQTT, etc.). Develop the GUI using a mix of off-the-shelf UI components and custom modules. Ensure the UI code is well-structured, scalable, and testable, conforming to UX/architecture guidelines. Ensure compliance with modern accessibility standards and usability best practices across browsers and devices. Contribute to software architecture, project planning, and specification documentation. Job Requirements: Proficiency in frontend technologies including HTML5, CSS3, JavaScript, TypeScript, React, and Next.js. Experience with backend services using NestJS and related TypeScript tooling. Understanding of various communication protocols like TCP/IP, HTTP, and SNMP. Experience with containerization tools such as Docker. Ability to design, implement, integrate, and verify software applications on Linux and Windows OS. Proven product development experience from concept through deployment. Familiarity with networked applications that require low-latency and high-availability. Preferred Experience: Knowledge of communication systems design. Understanding of various communication protocols, including RS-232, I2C, CAN, SPI, USB, TCP, and UDP over IP. Familiarity with databases, web servers (e.g. Apache), and UI/UX design. Interested? Apply today via the link provided!
About Us We're building the world's leading cross-border fintech for emerging markets - empowering families, fueling local economies, and changing how millions access financial services. Since our launch in 2019, we have transformed how money moves across borders with our operations spanning 6 out of 7 continents and covering both the busiest and most underserved (remittance) corridors. We tapped into a massive shift - from banks to phones - bringing digital finance to places where traditional systems never reached. The next stage of growth will fuel a network of services and products especially designed to make money more accessible to diaspora communities including local cards, and additional savings and payments features. We're growing fast, backed by world-class investors, and scaling a product that blends real world impact with cutting edge fintech innovation. Here's a little more: Founded by Harvard grads and 3-time founders who previously built Segovia (acquired) and GiveDirectly (>$300M revenue, fastest-growing NGO in the world) Backed by top investors including Spark Capital, Canaan, Reid Hoffman, Breyer Capital, Unbound, Wamda, and more Built by global top performers from Bain, Google, McKinsey, Uber, Checkout, Bolt, and beyond - we move fast, stay humble, and care deeply about our mission Truly global team - 250+ people, 50+ nationalities, 50+ languages Guided by our values - ownership, impact, humility, and heart - in deed, not just word The Role We are looking for a Senior Software Engineer to join our growing engineering team to define, build and iterate on features for our internal tooling. You will work closely with Developers, Product, Operations, Customer Support, Growth and other functions to design and build a reliable, intuitive, and simple experience for our internal users in finance, treasury, and operations. As an early member of the team, you will also have a lot of impact on our team culture, processes and norms. Taptap Send is a cross-platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs on AWS and is managed via Terraform. Our internal tools leverage these technologies in addition to Web React and Python. We're an encouraging environment that values both teamwork and autonomy, and have many exciting upcoming challenges, including: scaling up to handle increased volume and complexity, improving UI and UX to drive growth and retention, building internal tools, developing new small business solutions, and much more! Your Responsibilities: Take ownership of development of internal tool solutions Build experiences across the stack using primarily Python, and on occasion Kotlin Write well-tested, high quality code, with an eye towards generics and re-use Work closely with design and product teams to regularly ship working features Participate in release planning and deployment of released build Mentor and advise team members Evaluate and deliver timeline estimates for projects Requirements: 5+ years of professional experience building api applications using Python or Kotlin ideally. Experience working in AWS cloud, and leveraging services like ECS, Lambda, RDS, DynamoDB, SQS, SNS, EventBridge. Experience owning user-facing features end-to-end, from conception to launch Experience developing software in a collaborative, multi-functional, and fast-paced environment Experience working on systems that have real-world performance and reliability constraints Strong communication and ability to manage conflicting priorities, setting expectations with stakeholders and be a driving force Ideally: Experience developing event driven system. Experience CI, CD processes and tools. High personal code/development standards (code review, unit testing, documentation, etc.) Desire to contribute to frontend development Taptap Values Impact first Team next Accept reality Propose solutions Win with grit Be proactively candid, with yourself and others Love the particular Own it Create positive energy Maybe, even have fun Taptap Send is an equal opportunity employer dedicated to building an inclusive and diverse workforce. All employment decisions are decided on the basis of qualifications, experience and business need. We strongly encourage applications who are members of underrepresented communities to apply. If you require reasonable adjustments to be made during the recruitment process, please do not hesitate to let us know. Any information you provide us in this respect will only be used to accommodate your requirements. Note: we recognize imposter syndrome is real - any candidate that does not perfectly fit every characteristic of this role is still strongly encouraged to apply.
Mar 19, 2026
Full time
About Us We're building the world's leading cross-border fintech for emerging markets - empowering families, fueling local economies, and changing how millions access financial services. Since our launch in 2019, we have transformed how money moves across borders with our operations spanning 6 out of 7 continents and covering both the busiest and most underserved (remittance) corridors. We tapped into a massive shift - from banks to phones - bringing digital finance to places where traditional systems never reached. The next stage of growth will fuel a network of services and products especially designed to make money more accessible to diaspora communities including local cards, and additional savings and payments features. We're growing fast, backed by world-class investors, and scaling a product that blends real world impact with cutting edge fintech innovation. Here's a little more: Founded by Harvard grads and 3-time founders who previously built Segovia (acquired) and GiveDirectly (>$300M revenue, fastest-growing NGO in the world) Backed by top investors including Spark Capital, Canaan, Reid Hoffman, Breyer Capital, Unbound, Wamda, and more Built by global top performers from Bain, Google, McKinsey, Uber, Checkout, Bolt, and beyond - we move fast, stay humble, and care deeply about our mission Truly global team - 250+ people, 50+ nationalities, 50+ languages Guided by our values - ownership, impact, humility, and heart - in deed, not just word The Role We are looking for a Senior Software Engineer to join our growing engineering team to define, build and iterate on features for our internal tooling. You will work closely with Developers, Product, Operations, Customer Support, Growth and other functions to design and build a reliable, intuitive, and simple experience for our internal users in finance, treasury, and operations. As an early member of the team, you will also have a lot of impact on our team culture, processes and norms. Taptap Send is a cross-platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs on AWS and is managed via Terraform. Our internal tools leverage these technologies in addition to Web React and Python. We're an encouraging environment that values both teamwork and autonomy, and have many exciting upcoming challenges, including: scaling up to handle increased volume and complexity, improving UI and UX to drive growth and retention, building internal tools, developing new small business solutions, and much more! Your Responsibilities: Take ownership of development of internal tool solutions Build experiences across the stack using primarily Python, and on occasion Kotlin Write well-tested, high quality code, with an eye towards generics and re-use Work closely with design and product teams to regularly ship working features Participate in release planning and deployment of released build Mentor and advise team members Evaluate and deliver timeline estimates for projects Requirements: 5+ years of professional experience building api applications using Python or Kotlin ideally. Experience working in AWS cloud, and leveraging services like ECS, Lambda, RDS, DynamoDB, SQS, SNS, EventBridge. Experience owning user-facing features end-to-end, from conception to launch Experience developing software in a collaborative, multi-functional, and fast-paced environment Experience working on systems that have real-world performance and reliability constraints Strong communication and ability to manage conflicting priorities, setting expectations with stakeholders and be a driving force Ideally: Experience developing event driven system. Experience CI, CD processes and tools. High personal code/development standards (code review, unit testing, documentation, etc.) Desire to contribute to frontend development Taptap Values Impact first Team next Accept reality Propose solutions Win with grit Be proactively candid, with yourself and others Love the particular Own it Create positive energy Maybe, even have fun Taptap Send is an equal opportunity employer dedicated to building an inclusive and diverse workforce. All employment decisions are decided on the basis of qualifications, experience and business need. We strongly encourage applications who are members of underrepresented communities to apply. If you require reasonable adjustments to be made during the recruitment process, please do not hesitate to let us know. Any information you provide us in this respect will only be used to accommodate your requirements. Note: we recognize imposter syndrome is real - any candidate that does not perfectly fit every characteristic of this role is still strongly encouraged to apply.
A global quantum technology company is seeking a Senior Cloud Backend Software Engineer to design and build scalable backend services for quantum technologies. The role focuses on developing cloud-native microservice architectures and distributed APIs, working with interdisciplinary teams to enable interaction with quantum hardware. The ideal candidate has strong experience in Python and cloud environments. Competitive salary, generous benefits, and a flexible working policy are offered.
Mar 19, 2026
Full time
A global quantum technology company is seeking a Senior Cloud Backend Software Engineer to design and build scalable backend services for quantum technologies. The role focuses on developing cloud-native microservice architectures and distributed APIs, working with interdisciplinary teams to enable interaction with quantum hardware. The ideal candidate has strong experience in Python and cloud environments. Competitive salary, generous benefits, and a flexible working policy are offered.
Location London Employment Type Full time Department Engineering Our Mission Reduce inequity by helping immigrants move money home, and become the leading cross-border fintech for emerging markets. The Team Founded by Harvard grads / 3rd time founders also founded Segovia (successful exit) and GiveDirectly (>300M revenue, fastest growing NGO). Top performers from top and varied organizations (e.g., Bain, Bolt, Google, McKinsey, SafeBoda, Uber, Zipline) we like moving fast, and we hire people that do as well. Driven by mission, guided by values (see below) - in deed, not just word. Team as global as the mission, >30 languages from 25 countries (i.e., if you're interested in learning to make Chicken Moambe, we're the place). About Us Taptap Send is backed by top VCs (Spark, Canaan, Reid Hoffman, Breyer Capital, etc.), rapidly growing and a great place for those looking for both impact and a fast paced tech startup environment. Read more about the journey in Reid Hoffmann's words or TechCrunch article. Launched in 2019, Taptap is tapping into a transformative shift in global finance: from banks to phones. While this has affected wealthier countries as well, it has been nothing short of a revolution for the emerging markets where the overwhelming majority of population had been unable to access digital finance previously. Taptap Send allows immigrants to send money home instantly and with no fee , saving money in the process. With a formal market size of >700B alone, we've got a lot more saving to do for our users. Our mission is to reduce inequity by helping immigrants move money home, and become the leading cross border fintech for emerging markets. And that's just the beginning We charge fees for transfers on fixed exchange rate corridors (e.g., XOF, XAF). Our Investors Spark Capital, Canaan, Reid Hoffman, Breyer Capital (Jim Breyer), Unbound (Shravin Mittal), Wamda (Fadi Ghandour), Firstminute Capital, Slow Ventures (Sam Lessin), Helios Partners (Souleymane Ba), Crossbeam Ventures (Ali Hamed), Nikesh Arora, Samih Toukan, and many other context specific angels The Role We are looking for a Senior Software Engineer to join our growing engineering team to define, build and iterate on features for our internal tooling. You will work closely with Developers, Product, Operations, Customer Support, Growth and other functions to design and build a reliable, intuitive, and simple experience for our internal users in finance, treasury, and operations. As an early member of the team, you will also have a lot of impact on our team culture, processes and norms. Taptap Send is a cross platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs on AWS and is managed via Terraform. Our internal tools leverage these technologies in addition to Web React and Python. We're an encouraging environment that values both teamwork and autonomy, and have many exciting upcoming challenges, including: scaling up to handle increased volume and complexity, improving UI and UX to drive growth and retention, building internal tools, developing new small business solutions, and much more! Your Responsibilities Take ownership of development of internal tool solutions Build experiences across the stack using primarily Python, and on occasion Kotlin Write well tested, high quality code, with an eye towards generics and re use Work closely with design and product teams to regularly ship working features Participate in release planning and deployment of released build Mentor and advise team members Evaluate and deliver timeline estimates for projects Requirements 5+ years of professional experience building API applications using Python or Kotlin ideally. Experience working in AWS cloud, and leveraging services like ECS, Lambda, RDS, DynamoDB, SQS, SNS, EventBridge. Experience owning user facing features end to end, from conception to launch Experience developing software in a collaborative, multi functional, and fast paced environment Experience working on systems that have real world performance and reliability constraints Strong communication and ability to manage conflicting priorities, setting expectations with stakeholders and be a driving force Ideally Experience developing event driven system. Experience CI, CD processes and tools. High personal code/development standards (code review, unit testing, documentation, etc.) Desire to contribute to frontend development Taptap Values Impact first Team next Accept reality Propose solutions Win with grit Be proactively candid, with yourself and others Love the particular Own it Create positive energy Maybe, even have fun Taptap Send is an equal opportunity employer dedicated to building an inclusive and diverse workforce. All employment decisions are decided on the basis of qualifications, experience and business need. We strongly encourage applications who are members of underrepresented communities to apply. If you require reasonable adjustments to be made during the recruitment process, please do not hesitate to let us know. Any information you provide us in this respect will only be used to accommodate your requirements. Note: we recognize imposter syndrome is real - any candidate that does not perfectly fit every characteristic of this role is still strongly encouraged to apply.
Mar 18, 2026
Full time
Location London Employment Type Full time Department Engineering Our Mission Reduce inequity by helping immigrants move money home, and become the leading cross-border fintech for emerging markets. The Team Founded by Harvard grads / 3rd time founders also founded Segovia (successful exit) and GiveDirectly (>300M revenue, fastest growing NGO). Top performers from top and varied organizations (e.g., Bain, Bolt, Google, McKinsey, SafeBoda, Uber, Zipline) we like moving fast, and we hire people that do as well. Driven by mission, guided by values (see below) - in deed, not just word. Team as global as the mission, >30 languages from 25 countries (i.e., if you're interested in learning to make Chicken Moambe, we're the place). About Us Taptap Send is backed by top VCs (Spark, Canaan, Reid Hoffman, Breyer Capital, etc.), rapidly growing and a great place for those looking for both impact and a fast paced tech startup environment. Read more about the journey in Reid Hoffmann's words or TechCrunch article. Launched in 2019, Taptap is tapping into a transformative shift in global finance: from banks to phones. While this has affected wealthier countries as well, it has been nothing short of a revolution for the emerging markets where the overwhelming majority of population had been unable to access digital finance previously. Taptap Send allows immigrants to send money home instantly and with no fee , saving money in the process. With a formal market size of >700B alone, we've got a lot more saving to do for our users. Our mission is to reduce inequity by helping immigrants move money home, and become the leading cross border fintech for emerging markets. And that's just the beginning We charge fees for transfers on fixed exchange rate corridors (e.g., XOF, XAF). Our Investors Spark Capital, Canaan, Reid Hoffman, Breyer Capital (Jim Breyer), Unbound (Shravin Mittal), Wamda (Fadi Ghandour), Firstminute Capital, Slow Ventures (Sam Lessin), Helios Partners (Souleymane Ba), Crossbeam Ventures (Ali Hamed), Nikesh Arora, Samih Toukan, and many other context specific angels The Role We are looking for a Senior Software Engineer to join our growing engineering team to define, build and iterate on features for our internal tooling. You will work closely with Developers, Product, Operations, Customer Support, Growth and other functions to design and build a reliable, intuitive, and simple experience for our internal users in finance, treasury, and operations. As an early member of the team, you will also have a lot of impact on our team culture, processes and norms. Taptap Send is a cross platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs on AWS and is managed via Terraform. Our internal tools leverage these technologies in addition to Web React and Python. We're an encouraging environment that values both teamwork and autonomy, and have many exciting upcoming challenges, including: scaling up to handle increased volume and complexity, improving UI and UX to drive growth and retention, building internal tools, developing new small business solutions, and much more! Your Responsibilities Take ownership of development of internal tool solutions Build experiences across the stack using primarily Python, and on occasion Kotlin Write well tested, high quality code, with an eye towards generics and re use Work closely with design and product teams to regularly ship working features Participate in release planning and deployment of released build Mentor and advise team members Evaluate and deliver timeline estimates for projects Requirements 5+ years of professional experience building API applications using Python or Kotlin ideally. Experience working in AWS cloud, and leveraging services like ECS, Lambda, RDS, DynamoDB, SQS, SNS, EventBridge. Experience owning user facing features end to end, from conception to launch Experience developing software in a collaborative, multi functional, and fast paced environment Experience working on systems that have real world performance and reliability constraints Strong communication and ability to manage conflicting priorities, setting expectations with stakeholders and be a driving force Ideally Experience developing event driven system. Experience CI, CD processes and tools. High personal code/development standards (code review, unit testing, documentation, etc.) Desire to contribute to frontend development Taptap Values Impact first Team next Accept reality Propose solutions Win with grit Be proactively candid, with yourself and others Love the particular Own it Create positive energy Maybe, even have fun Taptap Send is an equal opportunity employer dedicated to building an inclusive and diverse workforce. All employment decisions are decided on the basis of qualifications, experience and business need. We strongly encourage applications who are members of underrepresented communities to apply. If you require reasonable adjustments to be made during the recruitment process, please do not hesitate to let us know. Any information you provide us in this respect will only be used to accommodate your requirements. Note: we recognize imposter syndrome is real - any candidate that does not perfectly fit every characteristic of this role is still strongly encouraged to apply.
White Collar Factory (95009), United Kingdom, London, London Lead Software Development Engineer - Services About this role Capital One's mission is to change banking for good by bringing humanity, ingenuity and simplicity to banking. Sitting at the core of such values is our Software Engineering department whose primary role is to be an enabler of our ambitions. Capital One is looking for a Senior Software Development Engineer to join a backend team, based in our London office on a hybrid basis. Our Engineers are people who lead by example, build strong and valuable relationships and have the confidence to influence at all levels. We are proud of who we are and what we do and want you to join us at this particularly exciting time at Capital One. What you'll do You will lead a team or cross-functional squad in the delivery of complex and ambiguous projects that support a broader business outcome You will take end-to-end responsibility for technical design, implementation, and operational considerations Collaborate with engineers, architects, product owners, and stakeholders to ensure successful project outcomes You will play a crucial role in supporting the elevation of engineering enablement, excellence, and experience across the broader engineering community You will collaborate and contribute to the development and dissemination of standardised and sustainable best practices, tools, patterns, and frameworks that enhance the productivity and quality of engineering efforts business-wide Your focus is on a major portion of existing or new team software (e.g., significant component, set of features, mid-size application or service) You'll work to achieve the goals and vision shared by Product Management and your Tribe Leadership Innovate within your team, initiative area and contribute within your technical domain What we're looking for Proven experience in technical leadership, including leading a team or cross-functional squad Proven experience working in both backend services and mobile technologies Exceptional programming skills and knowledge of building APIs using modern OO languages preferably Java, SOLID principles, SOA, HTTP and REST Experience with AWS and strong understanding of cloud-based development Extensive, demonstrable knowledge of designing architectures that are secure and perform at scale You're able to effectively communicate and work collaboratively across engineering to maximise inner-sourcing opportunities and reduce waste Proven experience ability to deliver high quality applications at scale An advocate for quality and the ability to support the team, leveraging approaches such as Pair Programming, TDD and BDD Where and how you'll work This is a permanent position and will be based in our London office. We have a hybrid working model which gives you flexibility to work from our offices and from home. We're big on collaboration and connection, so you'll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays. What's in it for you Bring us all this - and you'll be handsomely rewarded with a role contributing to the product roadmap for an organisation committed to transformation We're continuing our journey into the public cloud and have problems of scale, security, availability and performance for you to help solve We love continuous learning and that's why we give you 10% of your time to work on cutting edge innovative projects that shape the way we will work in the future We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers) Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave Open-plan workspaces and facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café What you should know about how we recruit We are committed to creating a level playing field and seek to create teams that are representative of our customers and the communities we serve. We'd love to hear from you if you identify with a typically under-represented group in our industry and are particularly keen to hear from women and ethnic minority candidates. We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it's about what you do, not just what you say. That's why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages. We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few: REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies OutFront - to provide LGBTQ+ support for all associates Mind Your Mind - signposting support and promoting positive mental wellbeing for all Women in Tech - promoting an inclusive environment in tech EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry Capital One is committed to diversity in the workplace. If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment. For technical support or questions about Capital One's recruiting process, please send an email to
Mar 16, 2026
Full time
White Collar Factory (95009), United Kingdom, London, London Lead Software Development Engineer - Services About this role Capital One's mission is to change banking for good by bringing humanity, ingenuity and simplicity to banking. Sitting at the core of such values is our Software Engineering department whose primary role is to be an enabler of our ambitions. Capital One is looking for a Senior Software Development Engineer to join a backend team, based in our London office on a hybrid basis. Our Engineers are people who lead by example, build strong and valuable relationships and have the confidence to influence at all levels. We are proud of who we are and what we do and want you to join us at this particularly exciting time at Capital One. What you'll do You will lead a team or cross-functional squad in the delivery of complex and ambiguous projects that support a broader business outcome You will take end-to-end responsibility for technical design, implementation, and operational considerations Collaborate with engineers, architects, product owners, and stakeholders to ensure successful project outcomes You will play a crucial role in supporting the elevation of engineering enablement, excellence, and experience across the broader engineering community You will collaborate and contribute to the development and dissemination of standardised and sustainable best practices, tools, patterns, and frameworks that enhance the productivity and quality of engineering efforts business-wide Your focus is on a major portion of existing or new team software (e.g., significant component, set of features, mid-size application or service) You'll work to achieve the goals and vision shared by Product Management and your Tribe Leadership Innovate within your team, initiative area and contribute within your technical domain What we're looking for Proven experience in technical leadership, including leading a team or cross-functional squad Proven experience working in both backend services and mobile technologies Exceptional programming skills and knowledge of building APIs using modern OO languages preferably Java, SOLID principles, SOA, HTTP and REST Experience with AWS and strong understanding of cloud-based development Extensive, demonstrable knowledge of designing architectures that are secure and perform at scale You're able to effectively communicate and work collaboratively across engineering to maximise inner-sourcing opportunities and reduce waste Proven experience ability to deliver high quality applications at scale An advocate for quality and the ability to support the team, leveraging approaches such as Pair Programming, TDD and BDD Where and how you'll work This is a permanent position and will be based in our London office. We have a hybrid working model which gives you flexibility to work from our offices and from home. We're big on collaboration and connection, so you'll be based in our London office 3 days a week on Tuesdays, Wednesdays and Thursdays. What's in it for you Bring us all this - and you'll be handsomely rewarded with a role contributing to the product roadmap for an organisation committed to transformation We're continuing our journey into the public cloud and have problems of scale, security, availability and performance for you to help solve We love continuous learning and that's why we give you 10% of your time to work on cutting edge innovative projects that shape the way we will work in the future We offer high performers strong and diverse career progression, investing heavily in developing great people through our Capital One University training programmes (and appropriate external providers) Immediate access to our core benefits including pension scheme, bonus, generous holiday entitlement and private medical insurance - with flexible benefits available including season-ticket loans, cycle to work scheme and enhanced parental leave Open-plan workspaces and facilities designed to inspire and support you. Our Nottingham head-office has a fully-serviced gym, subsidised restaurant, mindfulness and music rooms. In London, you can heighten your mood with a run on our rooftop running track or an espresso at the Workshop Coffee café What you should know about how we recruit We are committed to creating a level playing field and seek to create teams that are representative of our customers and the communities we serve. We'd love to hear from you if you identify with a typically under-represented group in our industry and are particularly keen to hear from women and ethnic minority candidates. We pride ourselves on hiring the best people, not the same people. Building diverse and inclusive teams is the right thing to do and the smart thing to do. We want to work with top talent: whoever you are, whatever you look like, wherever you come from. We know it's about what you do, not just what you say. That's why we make our recruitment process fair and accessible. And we offer benefits that attract people at all ages and stages. We also partner with organisations including the Women in Finance and Race At Work Charters, Stonewall and upReach to find people from every walk of life and help them thrive with us. We have a whole host of internal networks and support groups you could be involved in, to name a few: REACH - Race Equality and Culture Heritage group focuses on representation, retention and engagement for associates from minority ethnic groups and allies OutFront - to provide LGBTQ+ support for all associates Mind Your Mind - signposting support and promoting positive mental wellbeing for all Women in Tech - promoting an inclusive environment in tech EmpowHER - network of female associates and allies focusing on developing future leaders, particularly for female talent in our industry Capital One is committed to diversity in the workplace. If you require a reasonable adjustment, please contact All information will be kept confidential and will only be used for the purpose of applying a reasonable adjustment. For technical support or questions about Capital One's recruiting process, please send an email to
