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16 senior engineer jobs found

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senior engineer £400 - £500 Remote
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Remote  (16) Marlow  (1)
Outside Spy
Apr 17, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 16, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 15, 2026
Duration not stated
Senior AWS Engineer/ 6 month Contract/ Fully Remote/ Outside IR35 at Cloud Bridge, Marlow, £500 per day
£500 per day
Outside Spy Remote (Marlow, England, United Kingdom)
Senior AWS Engineer - Up to £500 per day 6 month initial contract Fully Remote - UK Based Outside IR35 Role Overview We are seeking an experienced Senior AWS Engineer to join our Professional Services delivery team on a fixed term basis to support the delivery of a major AWS migration and separation programme for an enterprise customer. This role will form part of a multi-disciplinary delivery team working alongside Solution Architects, Project Managers, and customer technical stakeholders to build, migrate, and deploy AWS infrastructure and application services as part of a structured separation of an existing hybrid estate into a new AWS Organisation. The successful candidate will play a hands-on role in delivering landing zone implementation, networking build activities, server migration, and application platform deployment using Infrastructure as Code (IaC) approaches. This is a customer-facing delivery role within a professional services consultancy...
Outside Spy
Apr 15, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 14, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 13, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 13, 2026
6 Months or more
Senior Data Centre Network Engineer - Remote - 12 Months at Hamilton Barnes, United Kingdom, 12 Months, £500 per day
£500 per day
Outside Spy Remote (United Kingdom)
Senior Data Centre Network Engineer - Remote - 12 Months - Outside IR35 We are seeking a Senior Data Centre Network Engineer to lead the design, build, and evolution of high-performance, scalable data centre networks. This role is focused on modern spine-leaf architectures, SDN, and automation, supporting large-scale, low-latency environments including cloud platforms, AI workloads, and distributed systems. Key Responsibilities Design and implement spine-leaf data centre network architectures for high availability and scalability Lead the adoption and optimisation of Software-Defined Networking (SDN) solutions Architect low-latency, high-throughput networks to support AI, cloud, and data-intensive workloads Define and enforce network standards, blueprints, and best practices Own Layer 2/Layer 3 design, including routing, switching, and segmentation strategies Design and optimise east-west traffic flows within large-scale DC environments Collaborate with...
Outside Spy
Apr 08, 2026
Duration not stated
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Go Backend Engineers (contractors) to join a large-scale public sector transformation programme delivered by a highly regarded product consultancy. This work is focused on moving critical systems away from a legacy C# ecosystem into a modern, scalable, cloud-native architecture. You’ll be joining cross-functional teams responsible for building resilient backend services that support high-impact, user-facing products used at national scale. This is a 6-month initial contract, ideal for engineers who enjoy working on meaningful systems, solving complex migration challenges, and delivering production-grade backend services, fast. The Role | Senior Backend Engineer, Go (Contract) | C# to Go Large-Scale Migration, AWS, SQL, Distributed Systems | £400-450/day |...
Outside Spy
Apr 14, 2026
Duration not stated
Senior Software Engineer at Belcan, United Kingdom, £500-£600 per day
£500 - £600 per day
Outside Spy Remote (United Kingdom)
Job Title: Senior Software Developer Location: Remote (South Coast England) Estimated Duration: 6 months Weekly hours : 40 hours Engagement Type: Outside IR35-Limited contract Rate: £500 - £600 per day Our Client is an Energy technology company are seeking to recruit Senior Software Developer and this is a Remote role. The role is for a contract position of 6 months Outside IR35. Our client has 150-year legacy of innovation and will focus on energy transformation, new technologies, decarbonization and Innovative leading-edge technology. Role: Role Overview This is a 6 month contractor assignment for an experienced Senior Software Developer with a strong focus on business analysis and pre-development solution shaping within a finance environment. The role is designed to provide short-term, high-impact support to Finance and Digital teams by ensuring business needs are clearly understood, analysed and translated into actionable requirements before...
Outside Spy
Apr 17, 2026
Duration not stated
Senior React Native Developer at Explore Group, United Kingdom, £500 per day
£500 per day
Outside Spy Remote (United Kingdom)
Senior React Native Engineer - 6 Months - Remote - £500 per day OUTSIDE We’re looking for two Senior React Native Software Engineer to join a fast-moving product team on a 6-month contract basis. Tech Stack React Native TypeScript Redux Toolkit / Zustand REST APIs / GraphQL Firebase / AWS (nice to have) Jest / React Native Testing Library GitHub Actions / CI/CD pipelines Details Duration: 6 months Location: Remote (UK-based only) Type: Outside IR35 Start Date: Immediate / Flexible Positions: 2 What We’re Looking For Strong commercial experience with React Native Solid TypeScript skills Experience shipping apps to App Store / Google Play Understanding of mobile architecture and performance Ability to work independently in a remote team Nice to Have Expo experience Native iOS/Android knowledge Startup or scale-up background Experience with CI/CD in mobile environments
Outside Spy
Apr 16, 2026
Duration not stated
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Product Engineers (contractors) with strong frontend or full-stack capabilities to join a large-scale public sector transformation programme. This role focuses on building modern, user-centric digital products as part of cross-functional teams spanning product, design, and engineering. You’ll be working on high-impact platforms, delivering intuitive, scalable web applications used by a wide range of users. This is a 6-month initial contract, ideal for engineers who combine strong frontend expertise with product thinking and a pragmatic approach to delivery. The Role | JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) |...
Outside Spy
Apr 14, 2026
Duration not stated
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Product Engineers (contractors) with strong frontend or full-stack capabilities to join a large-scale public sector transformation programme. This role focuses on building modern, user-centric digital products as part of cross-functional teams spanning product, design, and engineering. You’ll be working on high-impact platforms, delivering intuitive, scalable web applications used by a wide range of users. This is a 6-month initial contract, ideal for engineers who combine strong frontend expertise with product thinking and a pragmatic approach to delivery. The Role | JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) |...
Outside Spy
Apr 13, 2026
Duration not stated
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Product Engineers (contractors) with strong frontend or full-stack capabilities to join a large-scale public sector transformation programme. This role focuses on building modern, user-centric digital products as part of cross-functional teams spanning product, design, and engineering. You’ll be working on high-impact platforms, delivering intuitive, scalable web applications used by a wide range of users. This is a 6-month initial contract, ideal for engineers who combine strong frontend expertise with product thinking and a pragmatic approach to delivery. The Role | JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) |...
Outside Spy
Apr 08, 2026
Duration not stated
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract at Owen Thomas | B Corp™, United Kingdom, £400-£450 per day
£400 - £450 per day
Outside Spy Remote (United Kingdom)
JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) | 6-Month Contract We’re hiring multiple Senior Product Engineers (contractors) with strong frontend or full-stack capabilities to join a large-scale public sector transformation programme. This role focuses on building modern, user-centric digital products as part of cross-functional teams spanning product, design, and engineering. You’ll be working on high-impact platforms, delivering intuitive, scalable web applications used by a wide range of users. This is a 6-month initial contract, ideal for engineers who combine strong frontend expertise with product thinking and a pragmatic approach to delivery. The Role | JavaScript Developer, React focused, Product Engineer (Contract) | React, TypeScript, Node.js, AWS | Product-Led Delivery | £400-450/day | Outside IR35 | Fully Remote (UK) |...
Outside Spy
Apr 14, 2026
6 Months or more
Contract: Technical Business Analyst - 6 Months, Fully Remote - Outside IR35 at Hamilton Barnes, Remote, 6 Months, £400-£500 per day
£400 - £500 per day
Outside Spy Remote (Remote, UK)
Technical Business Analyst - 6 months, Fully Remote - Outside IR35 Role Overview In this role, you will gather, analyse, and document business and technical requirements across OSS/BSS systems and related platforms. You will work closely with stakeholders, engineers, and vendors to translate business needs into clear technical deliverables, supporting both operational improvements and strategic change programmes. Key Responsibilities Elicit and document detailed business and technical requirements across OSS/BSS systems. Analyse current processes, workflows, and data flows to identify improvement opportunities. Translate business requirements into user stories, functional specifications, and technical features. Work closely with engineering teams, PMO, and vendors to support delivery. Support process design, change initiatives, and system implementations. Contribute to testing, validation, and acceptance activities. Maintain clear documentation across...
Outside Spy
Apr 09, 2026
Duration not stated
Interaction Designer - Contract Fully Remote | 12 Months at Stealth IT Consulting, United Kingdom, £400 per day
£400 per day
Outside Spy Remote (United Kingdom)
Interaction Designer - Contract £400/day | Outside IR35 | Fully Remote | 12 Months We're looking for an experienced Interaction Designer to join a long-term programme delivering user-centred digital services at scale. You'll work closely with researchers, product managers, developers, and stakeholders to design intuitive, accessible user journeys. Role Details Contract length: 12 months Rate: £400 per day IR35: Outside Location: Fully remote Responsibilities Design end-to-end user journeys , flows, and interaction models Translate user needs and business requirements into clear interaction designs Produce wireframes, prototypes, and design specifications Collaborate closely with UX researchers, content designers, and engineers Iterate designs based on user feedback and usability testing Ensure designs meet accessibility and usability standards Required Skills & Experience Strong experience as an Interaction...
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