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27 senior full stack developer jobs found

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senior full stack developer
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Contract Spy
Sep 21, 2026
6 Months or more
Senior Full Stack Developer - C#/Azure/Kafka at Appvia, London, 6 Months, £600-£650 per day (Outside IR35)
£600 - £650 per day
Contract Spy London, UK
Senior Full Stack Developer - C#/Azure/Kafka Internal Title: Software Engineering Senior Consultant Location: London, UK (Hybrid - typically 1-2 days per week in office/client site) Contract: 6-month rolling contract Rate: £600-650 per day, Outside IR35 Start: ASAP About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering capability focuses on modern application development, cloud-native architecture, event-driven systems, and improving delivery outcomes through better engineering practices. We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, reliability, and security are critical. About the Role We’re looking for a Senior Full...
Contract Spy
Sep 17, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a...
Contract Spy
Sep 14, 2026
6 Months or more
Senior Full Stack Developer - C#/Azure/Kafka at Appvia, London, 6 Months, £600-£650 per day (Outside IR35)
£600 - £650 per day
Contract Spy London, UK
Senior Full Stack Developer - C#/Azure/Kafka Internal Title: Software Engineering Senior Consultant Location: London, UK (Hybrid - typically 1-2 days per week in office/client site) Contract: 6-month rolling contract Rate: £600-650 per day, Outside IR35 Start: ASAP About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering capability focuses on modern application development, cloud-native architecture, event-driven systems, and improving delivery outcomes through better engineering practices. We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, reliability, and security are critical. About the Role We’re looking for a Senior Full...
Contract Spy
Sep 10, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a...
Contract Spy
Sep 07, 2026
6 Months or more
Senior Full Stack Developer - C#/Azure/Kafka at Appvia, London, 6 Months, £600-£650 per day (Outside IR35)
£600 - £650 per day
Contract Spy London, UK
Senior Full Stack Developer - C#/Azure/Kafka Internal Title: Software Engineering Senior Consultant Location: London, UK (Hybrid - typically 1-2 days per week in office/client site) Contract: 6-month rolling contract Rate: £600-650 per day, Outside IR35 Start: ASAP About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering capability focuses on modern application development, cloud-native architecture, event-driven systems, and improving delivery outcomes through better engineering practices. We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, reliability, and security are critical. About the Role We’re looking for a Senior Full...
Contract Spy
Sep 03, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Competitive Rate
Contract Spy London, UK
Contract - Senior Full Stack Developer Job description Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35) Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte. The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a solid understanding of Development...
Contract Spy
Sep 17, 2026
Duration not stated
Senior Developer at Scrumconnect, Taunton, £400-£425 per day (Outside IR35)
£400 - £425 per day
Contract Spy Taunton, UK
Salary £400-£425 Outside Ir35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description   About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Role Purpose Join a blended agile delivery squad working on large-scale, secure digital services for a government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to...
Contract Spy
Sep 17, 2026
Duration not stated
Lead Technical Developer (.Net and Python) - SC Eligible at Scrumconnect, Taunton, £450-£500 per day (Outside IR35)
£450 - £500 per day
Contract Spy Taunton, UK
Salary £450-£500 Outside IR35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens.   We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Overview We are seeking an experienced Lead Technical Developer to provide hands-on technical leadership within a client delivery team. You will be responsible for driving engineering standards, code quality, and the technical...
Contract Spy
Sep 14, 2026
Hourly/Freelance
Data Infrastructure Engineer (Rust) - High Performance Computing at Alignerr, Remote, £Freelance Rate
Contract Spy Remote
What if your expertise in Rust could directly shape the infrastructure behind the world's most advanced AI systems? We're looking for a Senior Rust Engineer to design and build high-performance data pipelines, annotation tooling, and evaluation systems that power cutting-edge AI research and production workflows. This is a fully remote contract role working alongside leading AI labs on real, high-impact engineering challenges — not toy projects. If you live and breathe Rust and care deeply about performance, safety, and correctness, this is the work you've been waiting for. Organization : Alignerr Type : Hourly Contract Location : Remote Commitment : 20–40 hours/week What You'll Do Design, build, and optimize high-performance systems in Rust supporting large-scale AI data pipelines and evaluation workflows Develop full-stack tooling and backend services for data annotation , validation, and quality control at scale Identify and...
Contract Spy
Sep 10, 2026
Duration not stated
Senior Developer at Scrumconnect, Taunton, £400-£425 per day (Outside IR35)
£400 - £425 per day
Contract Spy Taunton, UK
Salary £400-£425 Outside Ir35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description   About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Role Purpose Join a blended agile delivery squad working on large-scale, secure digital services for a government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to...
Contract Spy
Sep 10, 2026
Duration not stated
Lead Technical Developer (.Net and Python) - SC Eligible at Scrumconnect, Taunton, £450-£500 per day (Outside IR35)
£450 - £500 per day
Contract Spy Taunton, UK
Salary £450-£500 Outside IR35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens.   We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Overview We are seeking an experienced Lead Technical Developer to provide hands-on technical leadership within a client delivery team. You will be responsible for driving engineering standards, code quality, and the technical...
Contract Spy
Sep 04, 2026
6 Months or more
Senior Full Stack/Node.js Engineer at Department for Work & Pensions, Manchester, 12 Months, £Contract Rate
Contract Spy Manchester, UK
The Department for Work and Pensions (DWP) is responsible for welfare, pensions, and child maintenance policy. As the UK's biggest public service department, it administers the State Pension and a range of working age, disability and ill health benefits to around 20 million claimants and customers. As such, we operate on a scale that is almost unmatched anywhere in Europe and most people in Britain come into contact with us at some point in their lives.   Working with DWP, you will be helping us to drive our priorities to:   Help people to move into work and support those already in work to progress, with the aim of increasing overall workforce participation Help people to plan and save for later life, while providing a safety net for those who need it now Provide effective, efficient, and innovative services to the millions of claimants who rely on us every day, including the most vulnerable in society Improve experience of our services while...
Contract Spy
Sep 03, 2026
Duration not stated
Senior Developer at Scrumconnect, Taunton, £400-£425 per day (Outside IR35)
£400 - £425 per day
Contract Spy Taunton, UK
Salary £400-£425 Outside Ir35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description   About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Role Purpose Join a blended agile delivery squad working on large-scale, secure digital services for a government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to...
Contract Spy
Sep 03, 2026
Duration not stated
Lead Technical Developer (.Net and Python) - SC Eligible at Scrumconnect, Taunton, £450-£500 per day (Outside IR35)
£450 - £500 per day
Contract Spy Taunton, UK
Salary £450-£500 Outside IR35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens.   We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Overview We are seeking an experienced Lead Technical Developer to provide hands-on technical leadership within a client delivery team. You will be responsible for driving engineering standards, code quality, and the technical...
Contract Spy
Sep 02, 2026
6 Months or more
Senior Java Developer at Delta Capita, Sheffield, 6 Months initial, £500-£550 per day
Contract Spy Sheffield, UK
Senior Java Developer - Contractor Job description 3 days per week on site in Sheffield Initial 6 Months Contract £500-£550 p/d   As a Senior Java Developer, you will manage the team and contribute to the design and development of end‑to‑end solutions, working across the full technology stack and playing an active role in the continued evolution of a business‑critical platform.   Joining a Global team and working collaboratively to deliver a modern and scalable platform. The team is focused on building new micro services as part of an ongoing programme to modernise the existing architecture and progressively decommission legacy systems. Job requirements Key Responsibilities Deliver high‑quality code into production, supporting the design and evolution of a microservices‑based architecture. Set the pace for delivery across the team, leading by example through consistent and reliable...
Contract Spy
Sep 17, 2026
Duration not stated
Technical Project Manager at Tech Holding, London/Remote, £Contract Rate
Contract Spy Hybrid (London, UK)
About us: Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients. Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability. The Role: We are seeking an experienced Technical Project Manager to drive the successful delivery of complex technology projects through rigorous governance and structured execution. The ideal candidate brings 5-6 years of hands-on project management experience, focused on formal project management methodologies, cross-functional leadership, and establishing clear...
Contract Spy
Sep 17, 2026
Duration not stated
Full Stack Developer at Deloitte, London/Remote, £Competitive Rate
Contract Spy Hybrid (London, UK)
  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position requires a...
Contract Spy
Sep 16, 2026
Duration not stated
IT Proximity Engineer at Everience Benelux, Goole, £Freelance Rate
Contract Spy Goole DN14, UK
Everience is an international consulting group delivering AI-augmented digital services and placing people at the heart of the AI revolution. With a presence in Europe, Africa, Asia and America, Everience offers its 4,000-strong workforce the most demanding and stimulating environment in which to transform and develop their skills, learning about new AI-based roles and building their future employability. Through its Symbiotic Academy the group offers a unique hub for training, practical application and exchange where everyone can experiment, learn, and progress in the fields of artificial intelligence and data. In accordance with its core purpose of orchestrating the symbiotic relationship between humans and AI in the workplace, Everience is making the augmented employee the driving force of a “symbiotic age”, where AI enhances talents and opens up new career opportunities. Description du poste We are looking for an IT Proximity Engineer to join a...
Contract Spy
Sep 16, 2026
Duration not stated
Software Engineer (Full Stack) SFIA Level 4 - SC Cleared at Layer7, Remote/Newcastle-Upon-Tyne, £470 per day
£470 per day
Contract Spy Remote (Newcastle-Upon-Tyne, UK)
Rate: £470 per day Inside IR35 Location: Hybrid with occasional onsite attendance in Newcastle or Manchester Clearance: Active SC Clearance or eligibility to obtain SC Clearance required Contract Type: Contract Overview We are seeking an experienced SFIA Level 4 Software Engineer to join a high-profile public sector delivery programme. The successful candidate will be a strong full-stack engineer with extensive experience across Java-based Back End technologies and modern web development frameworks. You will work within agile, multidisciplinary teams to design, develop, test, and deliver scalable digital services supporting critical government and public sector initiatives. Key Responsibilities Design, develop and maintain high-quality software solutions across the full technology stack. Build and enhance Back End services using Java and Spring-based technologies. Develop and maintain RESTful APIs and microservices architectures....
Contract Spy
Sep 16, 2026
Duration not stated
Software Engineer (Full Stack) SFIA Level 5 - SC Cleared at Layer7, Manchester, £575 per day
£575 per day
Contract Spy Manchester, UK
Rate: £575 per day Inside IR35 Location: Hybrid with occasional onsite attendance in Newcastle or Manchester Clearance: Active SC Clearance or eligibility to obtain SC Clearance required Contract Type: Contract Overview We are seeking an experienced SFIA Level 5 Software Engineer to join a high-profile public sector delivery programme. The successful candidate will be a strong full-stack engineer with extensive experience across Java-based Back End technologies and modern web development frameworks. You will work within agile, multidisciplinary teams to design, develop, test, and deliver scalable digital services supporting critical government and public sector initiatives. Key Responsibilities Design, develop and maintain high-quality software solutions across the full technology stack. Build and enhance Back End services using Java and Spring-based technologies. Develop and maintain RESTful APIs and microservices architectures....
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