18 senior full stack engineer jobs found

Senior Full Stack Engineer. £600-£650 per day | Outside IR35 We're supporting a leading financial services organisation in the search for a Senior Full Stack Engineer to join a product-focused team building customer-facing digital solutions. Experience within Insurance, InsurTech, FinTech, Banking, or another regulated industry is highly desirable. This is a hands-on role where you'll take ownership of delivery across the full software lifecycle, from design and development through to deployment, optimisation and support, working with modern cloud-native technologies on Microsoft Azure . Key Requirements Strong full stack engineering experience TypeScript and React (Angular or Vue also welcome) Backend development with .NET, Node.js, Java or Python Azure cloud-native application development REST APIs, microservices and event-driven architecture CI/CD, automated testing and DevOps practices Docker, Kubernetes and Terraform Experience delivering...

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction. They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python. This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions. It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working...

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction. They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python. This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions. It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working...

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction. They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python. This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions. It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working...

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction. They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python. This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions. It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working...

Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract We’re partnering with a fast-scaling, globally distributed tech business that’s investing heavily in the evolution of its platform – modernising backend services, improving frontend experiences, and setting long-term architectural direction. They’re looking for a Staff Full Stack Engineer (Contract) with strong commercial experience in Rust and Java, alongside hands-on experience building production-grade applications with React and Python. This is a high-impact, long-term contract within an experienced, product-focused engineering team, where you'll play a key role in developing scalable backend systems, delivering modern frontend experiences, and influencing architectural decisions. It’s well suited to an experienced contractor who enjoys owning complex technical challenges, working...

🚨 Principal Forward Deployed Engineer | Sovereign AI | Outside IR35 | £650–850 per day I’m working on an exciting contract opportunity for a Principal Forward Deployed Engineer to join a growing team delivering cutting-edge AI solutions across defence and national security. This is a hands-on, technically demanding role for someone who enjoys taking products from 0 to 1, solving complex infrastructure challenges and getting software deployed into highly secure, restricted and air-gapped environments. 💰 £650–850 per day 📄 3–6 month contract 💼 Outside IR35 📍 London | 1–2 days per week on-site 🔐 Active DV clearance essential 🔍 What you’ll be doing: *Leading technical engagements with senior defence, engineering and security stakeholders. *Owning deployments end to end, from requirements gathering through to integration, testing, accreditation and handover. *Adapting cloud-native applications to Kubernetes, OpenShift, on-premise, private cloud...

WE ARE: At Adaptive, we are a technology provider firm that partners with capital, commodity, and digital market participants to build custom front-office technology, messaging systems, and trading infrastructure. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage. Our clients include the world's leading investment banks, investment managers, fintechs and capital market service providers. With a global reach, with offices in London, New York, Barcelona, Montreal, and Manila, we have a proven track record of delivering powerful, elegant and intuitive trading technology solutions, and we value technical pragmatism, collaboration, and clear communication. We're looking for a Senior Java / Systems Engineer with significant experience in Platform Exchange Systems to design, deliver, and optimise production-ready, high-performance, low-latency technology using Aeron. YOU...

Principal Forward Deployed Engineer Contract | Outside IR35 | London, Hybrid | DV Cleared This is a contract role, 6 months with a view to extend, Outside IR35, with the day rate to be confirmed. It is hybrid, with 2 to 3 days a week on site in London plus travel to customer sites, requires active DV clearance, and starts ASAP. About the Client Morela is proud to be supporting a fast-growing, venture-backed UK AI company building sovereign AI for defence, government and other highly regulated sectors. Their core product is an AI operating system built for secure, air-gapped environments. The client’s identity will be shared on introduction. The Role You will own the technical relationship with the client’s defence and government customers, taking a GCP-native product and getting it deployed, integrated, tested and accredited in whatever environment the customer runs, from Kubernetes and OpenShift to bare metal and air-gapped networks. From the first workshop...

Principal Forward Deployed Engineer Contract | Outside IR35 | London, Hybrid | DV Cleared This is a contract role, 6 months with a view to extend, Outside IR35, with the day rate to be confirmed. It is hybrid, with 2 to 3 days a week on site in London plus travel to customer sites, requires active DV clearance, and starts ASAP. About the Client Morela is proud to be supporting a fast-growing, venture-backed UK AI company building sovereign AI for defence, government and other highly regulated sectors. Their core product is an AI operating system built for secure, air-gapped environments. The client's identity will be shared on introduction. The Role You will own the technical relationship with the client's defence and government customers, taking a GCP-native product and getting it deployed, integrated, tested and accredited in whatever environment the customer runs, from Kubernetes and OpenShift to bare metal and air-gapped networks. From the first workshop with a security...

Principal/Lead Developer - AI-Assisted Engineering - Java/React - London Market Insurance - Contract to Permrequirement for an immediate start. The Principal/Lead Developer - AI-Assisted Engineering - Java/React - London Market Insurance - Contract to Perm will be working for a leading specialty insurance broking group, Embedded as the senior technical lead within one of several product squads. You'll work alongside a Development Manager, Product Owner and development team, owning technical direction with genuine autonomy and influence. Principal/Lead Developer - AI-Assisted Engineering - Java/React - London Market Insurance - Contract to Perm Key Skills: A career software developer, with a distinguished-engineer mindset: you own outcomes, not tickets London Market experience is essential, ideally gained within a broker (eg building or supporting a broker workbench or placement platform). Insurer, MGA, carrier or InsurTech backgrounds will also be considered Strong...

Python/React Full Stack DevOps Engineer 3-month contract (initially) Remote Working Outside-IR35 Market Rates (c£500 to £525 per day) The Opportunity: We are looking for DevOps Engineer with Full Stack experience, specifically with Python and React, to support the development of a public sector digital service, where you will be working within an Agile team, combining hands-on development with automation and operational delivery to build secure, reliable software. This opportunity suits engineers who enjoy building applications and taking responsibility for how they are tested, deployed and supported and is a hands-on role combining full stack software engineering, cloud deployment and DevOps practices. You will take ownership of changes throughout the delivery lifecycle, from backlog refinement and development through testing, deployment and operational handover, working across React and TypeScript interfaces, Python Back-End services and AWS infrastructure, taking...

Python/React DevOps Engineer | Outside IR35 | Remote We are looking for DevOps Engineer with Full Stack experience, specifically with Python and React, to support the development of a public sector digital service. This opportunity suits engineers who enjoy building applications and taking responsibility for how they are tested, deployed, and supported. The Role You'll work across React and TypeScript interfaces, Python Back End services and AWS infrastructure, taking features from initial refinement through to production. Working within an Agile team, you'll combine hands-on development with automation and operational delivery to build secure, reliable software. Key Responsibilities Develop accessible, responsive front ends using React and TypeScript. Build Python/FastAPI services, REST APIs and integrations with other systems. Deliver database changes, including data models, migrations and performance improvements. Configure and maintain AWS deployments, covering...

This role is delivered within secure environments. Candidates must be eligible for UK SC clearance and hold UK citizenship. Join the Mission At ByDesign Secure, we believe that world-class security shouldn't be an afterthought—it should be the foundation. We are an independent, outputs-based consultancy dedicated to solving complex data assurance challenges in the UK public sector. We are a lean, expert team focused on delivering high-impact outcomes. If you are a self-starter who thrives on autonomy and wants your work to contribute to secure, nationally significant programmes, we want to talk to you. About the Opportunity We’re looking for an experienced and collaborative Technical Author to work closely with our architecture, engineering and software development teams. This is not simply a proofreading role: you will evaluate the logic, structure and readability of deeply technical documents and help ensure complex information is accurate, clear and...

This role is delivered within secure environments. Candidates must be eligible for UK SC clearance and hold UK citizenship. Join the Mission At ByDesign Secure, we believe that world-class security shouldn't be an afterthought—it should be the foundation. We are an independent, outputs-based consultancy dedicated to solving complex data assurance challenges in the UK public sector. We are a lean, expert team focused on delivering high-impact outcomes. If you are a self-starter who thrives on autonomy and wants your work to contribute to secure, nationally significant programmes, we want to talk to you. About the Opportunity We’re looking for an experienced and collaborative Technical Author to work closely with our architecture, engineering and software development teams. This is not simply a proofreading role: you will evaluate the logic, structure and readability of deeply technical documents and help ensure complex information is accurate, clear and accessible. You’ll...

Full Stack Developer (Kotlin & TypeScript) - Public Sector Transformation - OUTSIDE IR35 - ACTIVE SC CLEARANCE REQUIRED Tecknuovo is a deliberately different digital consultancy, delivering secure, modern technology solutions while upskilling client teams to ensure zero long-term dependency. We are seeking an experienced Full Stack Developer (Kotlin & TypeScript) to support a major public sector transformation programme focused on the modernisation and decomposition of Legacy probation systems. This role would suit senior software engineers with strong experience delivering cloud-native applications, APIs and digital services within complex enterprise environments. You'll play a key role in building the next generation of platforms and services that will replace critical Legacy systems and support the wider transformation programme. Working as part of a multidisciplinary delivery team, you'll collaborate with architects, product teams, engineers and...

Full Stack Engineer Tecknuovo is a digital delivery partner with a Deliberately Different approach. This means we focus on people, not technology. We move at pace and ensure Zero Dependency on us at the end of each project. What you'll be working towards We are currently looking to engage with SC Cleared Full Stack Engineers on a large organisation project within the public sector. The successful candidate will have experience with: Kotlin Containerised Services Typescript (Or other UI Development) AWS (Preferable) *Please note this requires active Security Clearance* Your Journey : Passing the TeckBar The Teckbar is a benchmark we set for our associates to make sure we consistently deploy bestin-class teams to work with our clients. Talent Screen: Our Talent Team will be in touch to talk Tecknuovo, the role & values Tech Screen: We'll focus on real-life experience and deep dive into your technical background Offer: Job Done!...

Fully remote, outside IR35 contract role until 31/05/2027 - up to £750 per day Reapit - Who are we? Reapit is the original end-to-end business technology provider for estate agencies of all sizes. We've been helping sales and lettings agents build relationships and grow their businesses for more than 25 years. Our technology empowers property professionals across Europe, the Middle East, Australia, and New Zealand to work with buyers, sellers, tenants, and landlords to deliver a dream home experience. Worldwide, over 100,000 agents across more than 15,000 branches use Reapit to run their businesses, manage properties, collect rent, engage clients, and provide outstanding customer service every time. What you'll be doing Reporting to the Director of Engineering, you'll operate as a highly senior, technically hands-on Back End engineer, Embedded into a squad and owning delivery of substantive, cloud-native services end-to-end. Ad-hoc client interaction,...