251 jobs found

Senior Developer C# .Net, Azure cloud-native, Azure AI Foundry, SQL Hybrid - Central / West London & WFH Circa £70,000 - £90,000 + Bonus and good benefits An exciting opportunity for a Senior .Net Developer / Senior Software Engineer to combine their strong Microsoft .Net development experience with modern AI technology by playing a key role building up our clients AI driven capabilities. It's a role for a keen and confident Developer / Software Engineer that enjoys autonomy and embracing new technologies working in fast paced delivery focussed environments. It would best suit those used to working for small to medium sized businesses (SME's) and is open to those already operating at a Senior level as well as those looking to take a step-up. Our client recently brought development in-house and are building a team that already includes two highly capable Mid-Level Full-stack Engineers to migrate a complex monolithic booking system to a new .Net 10 Azure-native microservices solution. Reporting directly into the CTO, the Senior Developer will be hands-on as well as making pragmatic architectural and engineering decisions that keep delivery front and centre including building up their AI offering. To be considered for this exciting greenfield opportunity you'll need the following skills and experience: 6+ years commercial experience as a Developer or Software Engineer predominantly with Microsoft development tools (experience as a Senior or Lead or Mentor etc is beneficial but not essential) Strong backend development experience Strong C# / .NET experience from 8 onwards Strong Azure cloud-native development experience - AKS / Container Apps, Service Bus, API Management, Azure DevOps etc Good knowledge and experience with Azure AI Foundry Strong SQL / SQL Server experience schema design, EF Core migrations, query performance tuning etc Good knowledge of software architecture, scalability and best practice Experience with Microservices patterns Experience with Frontend Development - React / TypeScript / Angular etc Strong team player and comfortable engaging with business stakeholders and 3rd party partners. This role is perfect for those who thrive in small, flat-structured, collaborative team environments where your contribution makes a real difference. Salary will reflect experience and likely to be in the £70,000 - £90,000 range although higher would be considered. The client can also offers working from home on a Monday and Friday. For further information, please send your CV to Wayne Young at Young's Employment Services Ltd. YES are operating as both a recruitment Agency and Recruitment Business.

the company is where designers, animators, and developers build interactive experiences. Design, animate, and code in one place. What you build in the editor is what ships in your app, game, or website. No mockups, no prototypes, no handoff. The real thing. With the company, designers and developers work with the same tools. No silos. What you see in the editor is what ships in production. Companies like Spotify, Duolingo, LinkedIn, Google, and Fortune 500 automakers use our open-source runtimes to build once and ship everywhere - websites, apps, games, and vehicles. We're looking for a Senior Software Engineer to join our team. As part of a lean, agile team, you'll have a high degree of autonomy, ownership and direct impact on customers, with the opportunity to help shape the architecture of the company's platform as we grow. We're looking for someone who is passionate about the backend and brings lessons learned from scaling SaaS platforms that were used by thousands of active users. About the Backend Team The backend team builds and operates the systems behind the company's cloud platform, focusing on the services and infrastructure that provide the core APIs, real time collaboration, file storage, and background processing for the editor. We also own a few full stack services that power the marketplace and customer facing experiences. How we work With a high degree of autonomy and ownership, engineers are trusted to identify problems, shape solutions, and drive the technical direction of the platform. Everyone contributes to architectural decisions and has a broad impact across our stack. While our focus is on backend systems, there are also opportunities to influence and contribute to other parts of the company, including the editor and the runtimes. Collaboration is core to our culture - teams across the company work closely to design, build, and evolve our product together. We provide modern tooling, including a generous AI/tooling budget, and encourage thoughtful use of AI assisted development where it improves speed, understanding, and quality. The team is distributed between the U.K. and U.S., where we maintain a hybrid office for collaboration and deep technical work. What you'll work on: Core APIs and services that drive the company editor, multiplayer collaboration, asset management, and the company Marketplace. Database architecture and optimization, designing schemas and queries that perform at scale and evolve with our product. Customer facing applications for authentication, accounts, billing, and team management. Observability and telemetry, building insight into how our systems behave and how customers use the company. File and asset storage systems, including object storage, CDN distribution and caching layers for fast, reliable access. Real time infrastructure for live collaboration, syncing thousands of changes per second across sessions with low latency. Distributed background systems for rendering, asset conversion, and large scale task orchestration. Scalability and reliability engineering, ensuring the company stays fast and stable as we grow. Security, compliance, and permissions models that protect our customers and meet enterprise grade standards. Tech Stack includes: Node.js (TypeScript & JavaScript), Dart/Flutter, C++, MySQL (Aurora), Redis, OpenSearch, AWS (Fargate, Lambda, CloudWatch), Docker, Terraform, GitHub Actions Requirements 8+ years of professional software engineering experience, specifically in backend and infrastructure. Proven track record of owning and delivering backend services for scaling SaaS based products that are widely relied upon by active users. Node.js experience, or strong experience in multiple programming languages and evidence of learning new ones quickly. Experience with cloud infrastructure (AWS preferred), infrastructure as code, and container orchestration. Strong SQL skills, including hands on experience with query analysis and optimization. Ability to work independently in ambiguous situations: seek out requirements, make sound decisions, and prioritize effectively. Excellent communication skills, with willingness to work directly with customers when needed. Benefits £120k-£135k or $170-195k USD base salary + stock options Unlimited holiday (PTO) and comprehensive health benefits Parental leave Regular team meetups and travel opportunities Hybrid flexible work environment with Offices in London (Farringdon) and San Francisco (Potrero Hill) Coffee and lunch on us when you're in the office Compensation may depend on the level of experience and geographic location. Visa sponsorship is not available. The successful candidate will be required to provide evidence of their right to work in the U.K. or U.S. prior to commencing employment. At the company, we are a global group of passionate designers and developers who believe in transparency, failing fast, quick iteration, and experimentation. We aim to build a diverse and inclusive culture where everyone feels supported. We have an incredible opportunity to change the world of interactive content creation. Help us accelerate the design industry's transition to the company! A real human will read your resume, cover letter, and answers to the application questions so please take a minute and tell us more about you! Applications suspected to be entirely AI generated may not be considered. We value genuine, thoughtful responses and authentic, human communication.

United States Digital Space LLC is seeking a Senior Software Engineer to join our agile team. You'll have autonomy and a significant impact on building core backend services for our platform used by major companies like Spotify and Google. This role requires at least 8 years of experience in backend development, particularly with Node.js and AWS, alongside strong SQL skills. We offer a competitive salary of £120k-£135k plus stock options, alongside unlimited holiday and health benefits. The position is based in the U.K. with a hybrid work model that promotes collaboration and innovation.

hackajob is partnering directly with Sage to hire for this role. We are looking for a Senior Backend Developer to join our HCM Localisation engineering team and help evolve a large-scale, cloud-based enterprise product. This role is focused on building and maintaining scalable backend services supporting complex product workflows, integrations, performance improvements, and ongoing platform moderni click apply for full job details

Senior Full Stack Developer Reporting to: Engineering Manager Office Environment: Hybrid (minimum two days per week) Type: Full time, permanent Join Our Mission Skip the queue. Shape the future. See real impact. At QuantSpark, we're transforming how data and AI serve society. We combine the analytical discipline of strategy consulting with the pace and ownership of a scale-up. That means you'll work directly on the problems that matter most-whether combating economic crime, modernising government services, or accelerating commercial growth for FTSE 100 companies. Here, you'll compress 5-10 years of traditional career progression into 2-3 years. From day one, you'll lead end-to-end projects, access leadership directly (including the CEO), and build cross-industry expertise that usually takes a decade to gain. We don't just develop - we build, own, and scale solutions that shape the organisations we work with and have meaningful societal impact. Our Client Portfolio We partner with forward-thinking organisations across sectors: Private Equity & Financial Services: Portfolio analytics, AI-powered value creation, and risk management tools for global investment and wealth firms. Retail & Consumer: Pricing optimisation, inventory efficiency, and personalised engagement for major UK retailers and brands. Asset Management: Advanced investment platforms and automated risk management for asset managers. Public Sector: Trusted by multiple UK government departments for fraud analytics, predictive maintenance, and supply chain optimisation. SaaS & Manufacturing: Sector-spanning technology transformation for SaaS innovators and manufacturers. The Role You'll design, build, and scale web applications across backend and frontend, owning projects from ideation through to production - architecture, CI/CD, cloud infrastructure, monitoring, the lot. We're a small team that punches well above its weight. Client feedback is outstanding, and every engineer here has a visible impact. Day to day, you'll: Architect and deliver scalable, secure software for commercial clients across multiple sectors. Assess technical trade-offs and guide design decisions across projects. Write, review, and own high-quality code - primarily Python (Flask, FastAPI, or Django) and JavaScript/TypeScript (React preferred). Build and maintain RESTful APIs and modern frontends. Work directly with clients - communicating clearly, understanding the why behind what you're building. Feed into new client proposals and help improve internal engineering processes. Mentor junior developers through code reviews, pairing, and knowledge-sharing. Use AI coding agents to accelerate delivery whilst maintaining correctness and security. AI Engineering (Required) Hands-on experience with AI coding agents in day-to-day work - prompting, iterating, reviewing generated code, validating outputs. Working understanding of LLM fundamentals and limitations (hallucinations, context windows, evaluation). Familiarity with prompting patterns, tool use, and concepts like RAG and embeddings. Awareness of safety and privacy concerns when using AI tools (secrets, PII, licensing). Ability to integrate AI into your workflow without compromising code quality. What We're Looking For 5+ years' experience as a full-stack engineer. Strong track record delivering enterprise-grade web applications and APIs. Confident across Python backend frameworks and modern frontend (React/TypeScript). Comfortable owning the full product lifecycle. Proactive, accountable, and effective in small, fast-moving teams. Clear communicator across technical and non-technical audiences. Keen to broaden into a generalist whilst deepening your core strengths - not just staying in one lane. What We Offer Tech ownership and autonomy from day one. High-impact work - you'll see real results within months, not years. Room to innovate, not just maintain. A small, collaborative team that owns problems end to end and learns fast. Clients ambitious enough to rethink how they use data and technology. A clear path to leading technical programmes and shaping strategy - growth here is earned, not queued. Perks & Benefits £6,000 annual training & conference budget to stay at the cutting edge Up to 6% matched pension for long-term financial security Comprehensive private healthcare via Vitality EMI share options scheme - own a piece of the growth you help create Work from anywhere in the world for up to 1 month/year 25 days holiday + buy/sell up to 5 additional days Cycle-to-work scheme for sustainable commuting Central London office stocked with refreshments, socials, and vibrant atmosphere Exclusive discounts on retail, travel, tech & fitness memberships Access to cutting-edge tools, platforms, and regular tech talks & innovation time Equal Opportunities We're building a team that benefits from different perspectives, experiences, and ways of thinking. We know that great talent comes from all backgrounds, and we encourage applications from everyone who meets the role requirements, regardless of age, disability, gender identity, race, religion, sexuality, or any other characteristic. If you're unsure whether you're a perfect fit but believe you can do the job well, we'd still like to hear from you. We hire based on your skills, potential, and ability to contribute to our team, and we're committed to a fair and objective selection process for all candidates.

Location London Employment Type Full time Location Type On-site Department Operations Compensation Competitive Base + Equity £50K - £150K Specific ranges are shared on a per-role basis when we open specific roles, calibrated to function, seniority, and location. Heads up We're not actively hiring right now. We've planned out our hiring for the next quarter or two, and roles will reopen as the team grows. We've kept this open so we can keep meeting people we'd love to work with - when a role opens that matches you, we'll reach out. About Kernel Enterprise AI only works when the underlying data is accurate - but most CRMs are filled with duplicates, broken hierarchies, and outdated information that undermine forecasting, territory planning, and AI deployments. We've raised a $14M Series A from top VCs and operators at Plaid, OpenAI, Slack and others to solve this with Agentic Company Data - the AI-native alternative to Dun & Bradstreet. RevOps teams at Gong, Navan, Mistral, AlphaSense, and Zip use Kernel to eliminate duplicates, fix hierarchies, and deliver the accuracy they need to operate with confidence. What a RevOps expert can do manually for a single record, Kernel can do safely at scale for an entire CRM. Our platform gives teams confidence in the data foundation that powers enterprise decision making and AI. Why This Exists At Kernel, we're always excited to connect with exceptional people who are passionate about building, scaling, and shipping at intensity. This Talent Pool isn't for a specific open role - it's a way for us to stay in touch with high impact people who could be a strong fit for future opportunities at Kernel as the team grows. Whether your expertise lies in Engineering, Product, or GTM, we'd love to hear from you. We currently review applications here roughly once a week. Roles We Typically Hire For At the application question stage, you'll be asked to tick the areas you're interested in. Engineering - Product Engineers (frontend / backend), Engineering Managers, Forward Deployed Engineers Product - Product Managers, Product Designers, Product Operations GTM - Account Executives, Account Managers, Sales Engineers, BDRs What We Look For Regardless of function, the people who do well at Kernel: Are ambitious and love intensity - they're motivated by the pace and stakes of an early stage company, no task is too small, and they're hungry to grow fast alongside the team. Want to be at a startup - whether it's your first one or your fifth, you've shown clear intent to join a small, fast moving team and you're energised by ambiguity. Take real ownership - they own outcomes end to end and are happy to wear multiple hats to get the job done, whatever the day requires. Move fast and learn from doing - they'd rather try something, see what happens, and improve from there than wait until everything is perfect. Speed of learning matters more than getting it right first time. Are strong communicators - they share context generously, raise issues early, and are comfortable giving and receiving direct feedback. It's how we move fast without losing clarity. Important to Know Working location: Minimum 4 days a week in our London (Borough) office. Most people do 5. Hours: This is an exciting but intense environment. Kernel is growing extremely fast and hours can often be long. Many of our customers are on the West Coast, and meetings can be held late in the evening. Pace: We move fast and ship constantly. If you need long roadmaps and perfect specs before you start, this won't be the right environment. What We Offer We will do our best to offer you a ride of a lifetime. It will not be easy, but it will be thrilling. Salary: Competitive base + equity (set per role and level) 24 days holiday per year + bank holidays 2 weeks work from anywhere Pension plan Top spec equipment and central London office Dinner provided when working past 6 pm Team events and dinners A fast paced ride in the early innings of a new technology wave Visas & Relocation We generally require candidates to have the right to work in the UK. For exceptional candidates, we may offer visa sponsorship and relocation support. What Happens Next We review applications here about once a week. If there's a strong match with a role we're about to open, we'll reach out for an intro chat. If not right now, we'll keep your details on file and circle back when something opens that fits. Compensation Range: £50K - £150K

Anthropic is seeking experienced software engineers to join Connectivity to design, build, and operate the core connectivity infrastructure behind external tool calls, including the MCP proxy and OAuth/token management. You will own reliability, incident response, and governance for enterprise connections, collaborating with research to productize capabilities and contribute to MCP standards and SDKs.

My client is looking for a Senior Software Engineer Backend Leaning Contract may also be considered. What You Will Be Doing You'll sit at the core of their product, building the systems that make advanced AI usable in the real world. If you enjoy owning backend services end to end, care deeply about reliability and API quality in a high-impact environment, this role offers both autonomy and real impa click apply for full job details

Lead Software Engineer - Backend Engineering - Java/Kotlin LONDON, LONDON, United Kingdom Job Information Job Identification Job Category Software Engineering Business Unit Corporate Sector Posting Date 01/14/2025, 08:19 AM Locations 4 John Carpenter St, London, Greater London, EC4Y 0JP, GB Job Schedule Full time Job Description Out of the successful launch of Chase in 2021, we're a new team, with a new mission. We're creating products that solve real world problems and put customers at the center - all in an environment that nurtures skills and helps you realize your potential. Our team is key to our success. We're people first. We value collaboration, curiosity and commitment. As a Lead Software Engineer at JPMorgan Chase within the Accelerator business, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. You have a curious mindset, thrive in collaborative squads, and are passionate about new technology. By your nature, you are also solution oriented, commercially savvy and have a head for fintech. You thrive in working in tribes and squads that focus on specific products and projects - and depending on your strengths and interests, you'll have the opportunity to move between them. While we're looking for professional skills, culture is just as important to us. We understand that everyone's unique - and that diversity of thought, experience and background is what makes a good team, great. By bringing people with different points of view together, we can represent everyone and truly reflect the communities we serve. This way, there's scope for you to make a huge difference - on us as a company, and on our clients and business partners around the world. Job Responsibilities Use domain modeling techniques to allow us to build best in class business products. Structure software so that it is easy to understand, test and evolve. Build solutions that avoid single points of failure, using scalable architectural patterns. Develop secure code so that our customers and ourselves are protected from malicious actors. Promptly investigate and fix issues and ensure they do not resurface in the future. Make sure our releases happen with zero downtime for our end users. See that our data is written and read in a way that's optimized for our needs. Keep an eye on performance, making sure we use the right approach to identify and solve problems. Ensure our systems are reliable and easy to operate. Keep us up to date by continuously updating our technologies and patterns. Required Qualifications, Capabilities and Skills Formal training or certification on problem solving concepts and proficient applied experience Identifies problems, proposes solutions, suggests what's best to focus on. Sees themselves as a problem solver. Contributes to the problem at hand, even when outside their area of speciality. A desire to teach others and share knowledge. We aren't looking for hero developers, more for team players. Adjusts quickly to changing priorities and conditions. Copes effectively with complexity and change. Learns and unlearns technologies and patterns quickly. Comfortable in uncharted waters. Can see the long term. Won't sacrifice the future for the present. Chooses technologies and approaches based on the end goals. High standards. Expects personal performance and team performance to be nothing short of the best. Does not cut corners ethically. Earns and maintains trust. Does what's best for the company, rather than what's best for themselves or their team. Able to take the initiative and shape their own path and a pragmatic and iterative approach to achieving our long term goals Technologies We primarily use Jvm based languages (Java/Kotlin) but we also have parts of the platform that use other languages as needed. We look to use Open source when it makes sense and build ourselves when it doesn't. We are entirely cloud native and want to build a truly multi cloud solution. We look at each problem independently and pick the right technology to solve it. We aren't afraid to try new things but we always remember that we are looking to build something to last, and we focus on solving real world problems for real life customers. EEO Statement We are an equal opportunity employer and place a high value on diversity and inclusion at our company. We do not discriminate on the basis of any protected attribute, including race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital or veteran status, pregnancy or disability, or any other basis protected under applicable law. We also make reasonable accommodations for applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs. Visit our FAQs for more information about requesting an accommodation.

Job Overview Citi is seeking a highly accomplished and visionary SVP, Digital Assets Platform Engineering Lead to spearhead the continued evolution of the Citi Integrated Digital Assets Platform (CIDAP). This is a senior leadership role requiring a rare combination of deep technical mastery, strategic thinking, and proven people leadership. The successful candidate will serve as both a technical authority and a team lead, guiding a high performing group of engineers in the design, delivery, and operationalization of enterprise grade blockchain and digital assets infrastructure at global scale. This individual will be a key voice in shaping Citi's digital assets engineering strategy, working at the intersection of traditional financial services technology and the emerging decentralized ecosystem. As a SVP leader, you will operate with a high degree of autonomy, influence cross functional outcomes, and be accountable for the platform's technical direction, engineering quality, and talent development. You will represent the engineering function to senior stakeholders across Technology, Business, Risk, and Compliance, and will be expected to translate complex technical concepts into strategic business outcomes. The ideal candidate brings a start up builder's mindset, a disciplined enterprise engineer's rigor, and the executive presence to lead, inspire, and align large teams across a globally distributed organization. Key Responsibilities Technical Leadership & Architecture Define and own the end to end technical strategy and architecture for the CIDAP platform, ensuring alignment with Citi's enterprise technology standards, risk appetite, and long term business objectives Provide authoritative technical guidance on backend engineering (Java/Spring), Web3 infrastructure, blockchain integration patterns, and distributed systems design Champion engineering excellence across the platform - setting the bar for code quality, system resilience, scalability, and performance Evaluate and introduce emerging technologies, frameworks, and industry best practices in blockchain, digital assets, and enterprise backend engineering to keep Citi at the forefront of the space Drive architectural decisions and review critical design proposals, ensuring solutions are robust, maintainable, and aligned with organizational standards Team Leadership & Talent Development Lead, mentor, and develop a team of senior software engineers, fostering a culture of innovation, accountability, and continuous learning Set clear technical and professional growth expectations for direct reports; provide ongoing coaching, performance feedback, and career development guidance Recruit and retain top engineering talent, contributing to workforce planning and capability building across the digital assets engineering practice Cultivate psychological safety, inclusion, and a high performance team culture within a globally distributed engineering environment Delivery & Execution Own the platform's engineering delivery commitments - accountable for on time, on budget, and high quality delivery of complex, multi workstream initiatives Drive Agile engineering practices across the team, ensuring effective sprint planning, backlog prioritization, dependency management, and retrospective driven improvement Define and enforce engineering quality standards including test coverage, code review practices, documentation, and CI/CD pipeline discipline Proactively identify, escal, and resolve technical risks, blockers, and cross team dependencies to ensure project momentum and stakeholder confidence Qualifications & Experience Bachelor's degree in Computer Science, Engineering, or a related discipline required; Master's or PhD in Computer Science strongly preferred Extensive progressive software engineering experience across the full software development and testing lifecycle, with demonstrated growth into senior technical leadership roles; experience within financial services or highly regulated industries strongly preferred Extensive hands on expertise in backend web application development using Java and Spring frameworks, with deep knowledge of enterprise architecture patterns, microservices, and distributed systems Solid direct people management or team lead experience, with a track record of developing senior engineers and delivering outcomes through teams Proven experience in Blockchain/Digital Assets application development, including blockchain integration, decentralized protocols, and tokenization frameworks Proven experience architecting and delivering high throughput, high availability enterprise systems that meet strict standards for reliability, scalability, and performance Strong proficiency in asynchronous programming paradigms and event driven architecture patterns Working knowledge of Web3 libraries (Web3J, Web3JS) and their application in enterprise contexts Demonstrated familiarity with Solidity and smart contract development best practices Solid understanding of DevOps principles, containerized application deployment (Docker, Kubernetes, Helm Charts), and CI/CD pipeline management Practitioner level command of Agile methodologies, Scrum, and scaled delivery frameworks Development Value: You will gain significant experience of the technologies and businesses and engineering groups across Citi, giving you exposure to new and existing methodologies and systems as well as the opportunity to work with multiple teams around the globe. As a member of the Citi Integrated Digital Assets Platform engineering team, you will have to opportunity to work with a team of highly motivated, T shaped, smart individuals who think out of the box and look for disruptive opportunities for commercial benefit. Exposure to newly released and upcoming technologies and the ability to positively contribute to the strategies of the business. By working within the senior leadership team you will be highly visible across Citi and will have access to Citi's executive management team. This job description provides a high level review of the types of work performed. Other job related duties may be assigned as required. Development Value Development Value: You will gain significant experience of the technologies and businesses and engineering groups across Citi, giving you exposure to new and existing methodologies and systems as well as the opportunity to work with multiple teams around the globe. As a member of the Citi Integrated Digital Assets Platform engineering team, you will have to opportunity to work with a team of highly motivated, T shaped, smart individuals who think out of the box and look for disruptive opportunities for commercial benefit. Exposure to newly released and upcoming technologies and the ability to positively contribute to the strategies of the business. By working within the senior leadership team you will be highly visible across Citi and will have access to Citi's executive management team. What we'll provide you By joining Citi London, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resources Visit ourGlobal Benefitspage to learn more. Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Other job related duties may be assigned as required. Job Family Group: Technology Job Family: Applications Development Time Type: Full time Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.