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11 senior full stack engineer jobs found

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senior full stack engineer £600 - £700
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Outside Spy
Oct 14, 2026
Duration not stated
Senior Full Stack Engineer - £600/650 Outside IR35 at Eames Consulting, London Area, £600-£650 per day
£600 - £650 per day
Outside Spy London Area, United Kingdom
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...
Outside Spy
Oct 22, 2026
Duration not stated
Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract at Owen Thomas | B Corp™, United Kingdom, £500-£600+ per day
£500 - £600+ per day
Outside Spy Remote (United Kingdom)
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...
Outside Spy
Oct 20, 2026
Duration not stated
Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract at Owen Thomas | B Corp™, United Kingdom, £500-£600+ per day
£500 - £600+ per day
Outside Spy Remote (United Kingdom)
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...
Outside Spy
Oct 15, 2026
Duration not stated
Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract at Owen Thomas | B Corp™, United Kingdom, £500-£600+ per day
£500 - £600+ per day
Outside Spy Remote (United Kingdom)
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...
Outside Spy
Oct 14, 2026
Duration not stated
Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract at Owen Thomas | B Corp™, United Kingdom, £500-£600+ per day
£500 - £600+ per day
Outside Spy Remote (United Kingdom)
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...
Outside Spy
Oct 13, 2026
Duration not stated
Staff Full Stack Engineer (Contract) | Rust & Java (Primary) | React & Python (Secondary) | Fully Remote (UK-based) | £500-600+/day | Outside IR35 | 12-Month Contract at Owen Thomas | B Corp™, United Kingdom, £500-£600+ per day
£500 - £600+ per day
Outside Spy Remote (United Kingdom)
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...
Outside Spy
Oct 15, 2026
Duration not stated
Principal Forward Deployed Engineer at Few&Far, London Area, £650–850 per day
£650–850 per day
Outside Spy London Area, United Kingdom
🚨 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...
Outside Spy
Oct 13, 2026
Duration not stated
Principal Forward Deployed Engineer at VIQU IT, Greater London, £600 to £700 per Day
£600 - £700 per day
Outside Spy Greater London, UK
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...
Outside Spy
Oct 13, 2026
Duration not stated
Principal Forward Deployed Engineer at VIQU Ltd, London, £600-£700 per day
£600 - £700 per day
Outside Spy London, Greater London, England, UK
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...
Outside Spy
Oct 13, 2026
6 Months or more
Principal/Lead Developer - AI-Assisted Engineering - Java/React - London Market Insurance at We Are Orbis Group Ltd, London, 6 Months, to £600 per day outside IR35
£500 - £600 per day
Outside Spy London, Hybrid, UK
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...
Outside Spy
Oct 13, 2026
Duration not stated
Senior .NET Engineer at Reapit Ltd, United Kingdom, to £750 per day
£650 - £750 per day
Outside Spy United Kingdom
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,...
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