Full-Stack Engineer (FX Trading Applications) Location: London (onsite 3 days per week) Day Rate: £700 (via Umbrella Company) Contract: Fixed Term Contract until 31 December 2026 About the Role Are you ready to dive into the dynamic world of FX Trading technology? Our client is seeking a talented Full-Stack Engineer with strong Java expertise and a passion for solving complex technical challenges. You'll play a key role in building mission-critical components that power high-performance trading systems-working closely with cross-functional teams in a fast-paced, agile environment. Key Responsibilities Engineering & Development Design and develop backend and frontend features for FX Trading applications. Write well-designed, testable, and efficient code across the full stack. Build automated test suites (unit, integration, contract, UI/API, performance). Define metrics and implement automated evaluation and drift detection for AI-related components. Reduce technical debt while improving modularity, observability, reliability, and performance. Architecture & Integration Integrate software components into cohesive, production-ready systems. Design clear, maintainable API contracts and ensure backward-compatible changes. Optimise low-latency, high-throughput services. Operational Excellence Troubleshoot, debug, and enhance existing systems. Instrument services with metrics, logs, and traces for faster incident resolution. Participate in deployments in line with strict change-control processes. Champion production-ready development through CI/CD gates, feature flags, and safe rollout/rollback strategies. Collaboration & Continuous Improvement Partner with Product, Sales, Trading, Operations, and Data Science teams to deliver business-aligned features. Participate in peer reviews while promoting secure coding and performance best practices. Recommend improvements in architecture, tooling, developer experience, and testing strategy. Contribute to a culture of engineering excellence and innovation. About You You're an engineer who thrives in agile, collaborative environments and enjoys building systems that genuinely influence business outcomes. You bring strong Java expertise, familiarity with Spring/Spring Boot , and a solid understanding of RESTful APIs and microservices . Experience with Kafka , SQL , and frontend technologies like Angular or React will help you shine. And if you have exposure to AI or Machine Learning , even better-that's a bonus our client truly values. Qualifications Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience). 5-9 years of hands-on professional software development experience. Experience in financial services-particularly within FX Trading -is highly desirable. Strong communication skills and proven success working in agile, cross-functional teams. Join the Team Join a vibrant, forward-thinking engineering group dedicated to pushing the boundaries of technology in financial services. If you're excited to build mission-critical systems that elevate trading performance and user experience, we want to hear from you. Apply now and take the next step in your engineering career! Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention. Due to the high volume of applications we receive, we are unable to respond to everyone individually. If you do not hear from us within 48 hours of applying, please assume that your application has been unsuccessful on this occasion.
Mar 10, 2026
Contractor
Full-Stack Engineer (FX Trading Applications) Location: London (onsite 3 days per week) Day Rate: £700 (via Umbrella Company) Contract: Fixed Term Contract until 31 December 2026 About the Role Are you ready to dive into the dynamic world of FX Trading technology? Our client is seeking a talented Full-Stack Engineer with strong Java expertise and a passion for solving complex technical challenges. You'll play a key role in building mission-critical components that power high-performance trading systems-working closely with cross-functional teams in a fast-paced, agile environment. Key Responsibilities Engineering & Development Design and develop backend and frontend features for FX Trading applications. Write well-designed, testable, and efficient code across the full stack. Build automated test suites (unit, integration, contract, UI/API, performance). Define metrics and implement automated evaluation and drift detection for AI-related components. Reduce technical debt while improving modularity, observability, reliability, and performance. Architecture & Integration Integrate software components into cohesive, production-ready systems. Design clear, maintainable API contracts and ensure backward-compatible changes. Optimise low-latency, high-throughput services. Operational Excellence Troubleshoot, debug, and enhance existing systems. Instrument services with metrics, logs, and traces for faster incident resolution. Participate in deployments in line with strict change-control processes. Champion production-ready development through CI/CD gates, feature flags, and safe rollout/rollback strategies. Collaboration & Continuous Improvement Partner with Product, Sales, Trading, Operations, and Data Science teams to deliver business-aligned features. Participate in peer reviews while promoting secure coding and performance best practices. Recommend improvements in architecture, tooling, developer experience, and testing strategy. Contribute to a culture of engineering excellence and innovation. About You You're an engineer who thrives in agile, collaborative environments and enjoys building systems that genuinely influence business outcomes. You bring strong Java expertise, familiarity with Spring/Spring Boot , and a solid understanding of RESTful APIs and microservices . Experience with Kafka , SQL , and frontend technologies like Angular or React will help you shine. And if you have exposure to AI or Machine Learning , even better-that's a bonus our client truly values. Qualifications Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience). 5-9 years of hands-on professional software development experience. Experience in financial services-particularly within FX Trading -is highly desirable. Strong communication skills and proven success working in agile, cross-functional teams. Join the Team Join a vibrant, forward-thinking engineering group dedicated to pushing the boundaries of technology in financial services. If you're excited to build mission-critical systems that elevate trading performance and user experience, we want to hear from you. Apply now and take the next step in your engineering career! Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention. Due to the high volume of applications we receive, we are unable to respond to everyone individually. If you do not hear from us within 48 hours of applying, please assume that your application has been unsuccessful on this occasion.
Founding Full-Stack Engineer (Greenfield Digital Banking) Central London 4 days onsite Full-time 90,000 - 100,000 + 15-20% bonus We're working with a highly successful, family-owned international private bank to hire a Founding Full-Stack Engineer for a brand new, greenfield digital banking build based in Central London. This is a rare opportunity to join right at the beginning of a newly formed product team and help build a next-generation digital banking experience from first principles deliberately outside of legacy systems. The environment is genuinely "startup-style" (small team, high ownership, fast delivery), but backed by serious scale, long-term investment, and a strong focus on quality, stability and client trust. The role As one of the first engineering hires, you'll play a key part in shaping: the technical foundations engineering standards architecture and system design how the team builds and ships product You'll work closely with Product and Design, delivering secure, high-quality digital experiences for high-value clients and complex workflows. What you'll do Design, build and maintain end-to-end features across frontend and backend Architect scalable, secure and maintainable systems for private banking / institutional use cases Own key technical decisions, balancing delivery speed with long-term quality Build APIs, services, data models and modern web experiences Establish high standards of engineering quality through testing, reviews and automation Contribute to platform foundations, shared components and internal tooling Embed security, performance and resilience best practices into everything you ship Help define engineering standards and ways of working as the team grows What we're looking for 8-12+ years' experience as a full-stack or senior engineer owning production systems Strong experience building modern web applications across frontend and backend Frontend expertise with modern frameworks (React, TypeScript or similar) Strong backend experience (Node.js, Java, Python or similar) Solid understanding of APIs, architecture, databases and cloud infrastructure Exposure to CI/CD and modern DevOps practices (containers, Kubernetes, automation) Comfortable being a technical owner in open-ended / ambiguous environments A builder mindset - pragmatic, delivery-focused, and quality-led Experience in financial services / fintech / regulated environments is beneficial but not essential Strong awareness of security, privacy and compliance considerations is highly valued Why this opportunity stands out Genuine greenfield build with meaningful ownership from day one Founding hire in a small, high-calibre team Startup-style delivery with the backing of a global financial institution Direct access to decision-makers and influence over product direction Quality-first culture focused on trust, stability and long-term value Competitive salary + strong bonus + benefits
Feb 27, 2026
Full time
Founding Full-Stack Engineer (Greenfield Digital Banking) Central London 4 days onsite Full-time 90,000 - 100,000 + 15-20% bonus We're working with a highly successful, family-owned international private bank to hire a Founding Full-Stack Engineer for a brand new, greenfield digital banking build based in Central London. This is a rare opportunity to join right at the beginning of a newly formed product team and help build a next-generation digital banking experience from first principles deliberately outside of legacy systems. The environment is genuinely "startup-style" (small team, high ownership, fast delivery), but backed by serious scale, long-term investment, and a strong focus on quality, stability and client trust. The role As one of the first engineering hires, you'll play a key part in shaping: the technical foundations engineering standards architecture and system design how the team builds and ships product You'll work closely with Product and Design, delivering secure, high-quality digital experiences for high-value clients and complex workflows. What you'll do Design, build and maintain end-to-end features across frontend and backend Architect scalable, secure and maintainable systems for private banking / institutional use cases Own key technical decisions, balancing delivery speed with long-term quality Build APIs, services, data models and modern web experiences Establish high standards of engineering quality through testing, reviews and automation Contribute to platform foundations, shared components and internal tooling Embed security, performance and resilience best practices into everything you ship Help define engineering standards and ways of working as the team grows What we're looking for 8-12+ years' experience as a full-stack or senior engineer owning production systems Strong experience building modern web applications across frontend and backend Frontend expertise with modern frameworks (React, TypeScript or similar) Strong backend experience (Node.js, Java, Python or similar) Solid understanding of APIs, architecture, databases and cloud infrastructure Exposure to CI/CD and modern DevOps practices (containers, Kubernetes, automation) Comfortable being a technical owner in open-ended / ambiguous environments A builder mindset - pragmatic, delivery-focused, and quality-led Experience in financial services / fintech / regulated environments is beneficial but not essential Strong awareness of security, privacy and compliance considerations is highly valued Why this opportunity stands out Genuine greenfield build with meaningful ownership from day one Founding hire in a small, high-calibre team Startup-style delivery with the backing of a global financial institution Direct access to decision-makers and influence over product direction Quality-first culture focused on trust, stability and long-term value Competitive salary + strong bonus + benefits
Fullstack Developer 8 months London - hybrid 1-2 days onsite every 2 weeks Inside IR35 - Umbrella only Skills required: Intermediate to advanced practical experience with: React and TypeScript Python AWS services i.e. Athena/Glue, DynamoDB, ECS, S3, Lambda, SQS, Step Function, etc Automated testing frameworks for Python and JavaScript Terraform for infrastructure-as-code Agile delivery workflows Tooling experience: Git Jira Confluence Desirable (Nice to Have): Cypress GitHub Actions Splunk Soft Skills & Behaviours: Clear and confident communicator, able to work with designers, product teams, testers, engineers, and external partners. Highly collaborative, supporting team success and contributing to shared goals. Positive, engaged, and proactive, bringing energy to team ceremonies and wider delivery activities. Comfortable with change, able to work through evolving requirements or priorities. Keen to learn and share knowledge, contributing to code reviews, pair?programming, and community?of?practice activities. Experienced working within Agile delivery, contributing to stand-ups, planning, reviews, retrospectives, and show?and?tell sessions. Delivers with quality, making sensible trade-offs and managing technical debt thoughtfully. Stays informed about modern technologies and practices, promoting proportionate adoption of tools that add value.
Feb 27, 2026
Contractor
Fullstack Developer 8 months London - hybrid 1-2 days onsite every 2 weeks Inside IR35 - Umbrella only Skills required: Intermediate to advanced practical experience with: React and TypeScript Python AWS services i.e. Athena/Glue, DynamoDB, ECS, S3, Lambda, SQS, Step Function, etc Automated testing frameworks for Python and JavaScript Terraform for infrastructure-as-code Agile delivery workflows Tooling experience: Git Jira Confluence Desirable (Nice to Have): Cypress GitHub Actions Splunk Soft Skills & Behaviours: Clear and confident communicator, able to work with designers, product teams, testers, engineers, and external partners. Highly collaborative, supporting team success and contributing to shared goals. Positive, engaged, and proactive, bringing energy to team ceremonies and wider delivery activities. Comfortable with change, able to work through evolving requirements or priorities. Keen to learn and share knowledge, contributing to code reviews, pair?programming, and community?of?practice activities. Experienced working within Agile delivery, contributing to stand-ups, planning, reviews, retrospectives, and show?and?tell sessions. Delivers with quality, making sensible trade-offs and managing technical debt thoughtfully. Stays informed about modern technologies and practices, promoting proportionate adoption of tools that add value.
Full Stack Developer (Java) Location: Hybrid - 2 Days Onsite in Manchester Type: Full-Time, Permanent (FTE) Salary: TBC Are you a passionate Full Stack Developer with strong Java expertise and a flair for building scalable, high-performance applications end-to-end? We're looking for a talented engineer to join our growing Financial Services team, working on modern web applications that make a real impa click apply for full job details
Feb 27, 2026
Full time
Full Stack Developer (Java) Location: Hybrid - 2 Days Onsite in Manchester Type: Full-Time, Permanent (FTE) Salary: TBC Are you a passionate Full Stack Developer with strong Java expertise and a flair for building scalable, high-performance applications end-to-end? We're looking for a talented engineer to join our growing Financial Services team, working on modern web applications that make a real impa click apply for full job details
About Contentsquare Contentsquare is the all in one experience intelligence platform designed to be easily used by anyone who cares about digital journeys. With our flexible and scalable platform, organizations quickly get a deep understanding of their customers' whole online journey. We are a global leader in the experience analytics space, with a growing presence across 15 offices worldwide. We're here to stay-and we're looking for team members who are excited to drive impact and help us scale even further. Our aim is to create an inclusive workplace where everyone learns and succeeds. Contentsquare has built a community of individuals who are daring, understanding, and deliberate. We invite you to join us in making the complex simpler-for our customers, their customers, and each other. Important note: Be careful of scammers pretending to be from Contentsquare. We will never ask for money or contact you through random texts. For more information, visit our careers blog. Role Overview 1. This is a software engineering role. We are looking for applicants with minimum 5 years of software engineering experience, with a particular background in TypeScript. While we are building software on top of LLMs, this is not a machine learning role. 2. This role is remote (France, Spain, Italy, Poland, Germany) but can also be office based (hybrid) in Barcelona, Paris, Milan, Munich or Cairo. We're looking for a Senior Fullstack Engineer (Applied AI) to join one of several exciting product initiatives currently in progress that leverage the latest in AI, particularly using Large Language Models (LLMs). One example project is extending our AI CoPilot product (currently only available in Heap) to more surfaces, allowing users without expertise in product or digital experience analytics to answer their questions simply by asking them. We are moving rapidly to leverage LLMs to reduce time to insight, make setup easier, and much more. As our next Senior Software Engineer (Applied AI), you will be focused on product development, with a side of early product iteration. For example, we expect engineers to participate in user interviews as we validate product hypotheses. This is an exciting opportunity to work in a "startup within the startup." We move quickly from idea to proof of concept to interview to product, ensuring that what we build provides actual value to our customers. As LLMs and the related technologies are growing and changing rapidly, we are enthusiastic about new ideas and libraries but discerning - what we build is foundational. We're a distributed team that operates across the US and Europe. We're open to hiring the right person anywhere within the US East Coast time zone or Europe. What we're looking for Desire to work in a fast paced development environment where the customer is in the loop. We prefer to fail fast and start over than to learn too late that we've built the wrong thing. Strong motivation to build an AI feature. Extensive fullstack web application development experience (5+ years), preferably in a data related industry. Experience with TypeScript, with a variety of front end frameworks (React, Vue, Node ). Nice to have Strong opinions, weakly held about how to evaluate the performance of an LLM based application. Experience bringing an application built on top of LLMs from inception to market. Ability to iterate/prototype rapidly to answer data related using LLMs (and other ML when appropriate). Awareness of what LLMs are good at, what they're not good at, and how to navigate this. Familiarity with various LLM providers and their relative tradeoffs. Why you should join Contentsquare We invest in our people through career development, mentorship, social events, philanthropic activities, and competitive benefits. We are always assessing the perks we offer to ensure we're aligned with the employees' needs. Here are a few we want to highlight: Virtual onboarding, Hackathon, and various opportunities to interact with your team and global colleagues both on and offsite each year Work flexibility: hybrid and remote work policies Generous paid time off policy (every location is different) Lifestyle allowance A Culture Crew in every country we're based in to coordinate regular activities for employees to get to know each other and bond outside of work Every full time employee receives stock options, allowing them to share in the company's success We have multiple Employee Resource Groups, that offer a safe space for individuals who share common identities, life experiences, or allyship to connect, support one another, and passionately advocate for the issues close to their hearts And more benefits tailored to each country Contentsquare is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to sex, gender identity or expression, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law. Your personal data is used by Contentsquare for recruitment purposes only. Read our Job Candidate Privacy Notice to find out more about data protection at Contentsquare and your rights. You can exercise your rights by using our dedicated Data Subject Rights Portal. Your personal data will be securely stored in our hosting provider's data center in Oregon (US west). We have implemented appropriate transfer mechanisms under applicable data protection laws. Contentsquare may use AI assisted tools to help review and screen applications. All decisions involving hiring are made by human reviewers, and your personal data will be processed in accordance with our Candidate Privacy Policy.
Feb 27, 2026
Full time
About Contentsquare Contentsquare is the all in one experience intelligence platform designed to be easily used by anyone who cares about digital journeys. With our flexible and scalable platform, organizations quickly get a deep understanding of their customers' whole online journey. We are a global leader in the experience analytics space, with a growing presence across 15 offices worldwide. We're here to stay-and we're looking for team members who are excited to drive impact and help us scale even further. Our aim is to create an inclusive workplace where everyone learns and succeeds. Contentsquare has built a community of individuals who are daring, understanding, and deliberate. We invite you to join us in making the complex simpler-for our customers, their customers, and each other. Important note: Be careful of scammers pretending to be from Contentsquare. We will never ask for money or contact you through random texts. For more information, visit our careers blog. Role Overview 1. This is a software engineering role. We are looking for applicants with minimum 5 years of software engineering experience, with a particular background in TypeScript. While we are building software on top of LLMs, this is not a machine learning role. 2. This role is remote (France, Spain, Italy, Poland, Germany) but can also be office based (hybrid) in Barcelona, Paris, Milan, Munich or Cairo. We're looking for a Senior Fullstack Engineer (Applied AI) to join one of several exciting product initiatives currently in progress that leverage the latest in AI, particularly using Large Language Models (LLMs). One example project is extending our AI CoPilot product (currently only available in Heap) to more surfaces, allowing users without expertise in product or digital experience analytics to answer their questions simply by asking them. We are moving rapidly to leverage LLMs to reduce time to insight, make setup easier, and much more. As our next Senior Software Engineer (Applied AI), you will be focused on product development, with a side of early product iteration. For example, we expect engineers to participate in user interviews as we validate product hypotheses. This is an exciting opportunity to work in a "startup within the startup." We move quickly from idea to proof of concept to interview to product, ensuring that what we build provides actual value to our customers. As LLMs and the related technologies are growing and changing rapidly, we are enthusiastic about new ideas and libraries but discerning - what we build is foundational. We're a distributed team that operates across the US and Europe. We're open to hiring the right person anywhere within the US East Coast time zone or Europe. What we're looking for Desire to work in a fast paced development environment where the customer is in the loop. We prefer to fail fast and start over than to learn too late that we've built the wrong thing. Strong motivation to build an AI feature. Extensive fullstack web application development experience (5+ years), preferably in a data related industry. Experience with TypeScript, with a variety of front end frameworks (React, Vue, Node ). Nice to have Strong opinions, weakly held about how to evaluate the performance of an LLM based application. Experience bringing an application built on top of LLMs from inception to market. Ability to iterate/prototype rapidly to answer data related using LLMs (and other ML when appropriate). Awareness of what LLMs are good at, what they're not good at, and how to navigate this. Familiarity with various LLM providers and their relative tradeoffs. Why you should join Contentsquare We invest in our people through career development, mentorship, social events, philanthropic activities, and competitive benefits. We are always assessing the perks we offer to ensure we're aligned with the employees' needs. Here are a few we want to highlight: Virtual onboarding, Hackathon, and various opportunities to interact with your team and global colleagues both on and offsite each year Work flexibility: hybrid and remote work policies Generous paid time off policy (every location is different) Lifestyle allowance A Culture Crew in every country we're based in to coordinate regular activities for employees to get to know each other and bond outside of work Every full time employee receives stock options, allowing them to share in the company's success We have multiple Employee Resource Groups, that offer a safe space for individuals who share common identities, life experiences, or allyship to connect, support one another, and passionately advocate for the issues close to their hearts And more benefits tailored to each country Contentsquare is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to sex, gender identity or expression, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law. Your personal data is used by Contentsquare for recruitment purposes only. Read our Job Candidate Privacy Notice to find out more about data protection at Contentsquare and your rights. You can exercise your rights by using our dedicated Data Subject Rights Portal. Your personal data will be securely stored in our hosting provider's data center in Oregon (US west). We have implemented appropriate transfer mechanisms under applicable data protection laws. Contentsquare may use AI assisted tools to help review and screen applications. All decisions involving hiring are made by human reviewers, and your personal data will be processed in accordance with our Candidate Privacy Policy.
