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90 back end developer jobs found

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United Kingdom back end developer
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Contract Spy
Feb 19, 2026
Duration not stated
Java Back-End Developer with Azure/AWS at ERP Tech Solutions Ltd, London, £300 per day (Outside IR35)
£300 per day
Contract Spy London, UK
Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've written...
Contract Spy
Feb 12, 2026
Duration not stated
Java Back-End Developer with Azure/AWS at ERP Tech Solutions Ltd, London, £300 per day (Outside IR35)
£300 per day
Contract Spy London, UK
Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've written...
Contract Spy
Feb 19, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Ledbury, £600-£650 per day
£600 - £650 per day
Contract Spy Ledbury, UK
Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Feb 18, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Great Malvern, £600-£650 per day
Contract Spy Great Malvern, Malvern, UK
Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Feb 13, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Great Malvern, £600-£650 per day
£600 - £650 per day
Contract Spy Great Malvern, Malvern WR14, UK
. Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Feb 06, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Great Malvern, £600-£650 per day
£600 - £650 per day
Contract Spy Great Malvern, Malvern WR14, UK
. Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Jan 30, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Great Malvern, £600-£650 per day
£600 - £650 per day
Contract Spy Great Malvern, Malvern WR14, UK
. Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Jan 29, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Gloucester, £600-£650 per day
£600 - £650 per day
Contract Spy Gloucester, England, United Kingdom
Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Jan 28, 2026
Duration not stated
Senior BackEnd Developer - Cyber at Methods Business and Digital Technology, Great Malvern, £600-£650 per day
£600 - £650 per day
Contract Spy Great Malvern, England, United Kingdom
Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while working hard; we are not afraid of making mistakes and...
Contract Spy
Feb 18, 2026
Duration not stated
iOS Engineer at Beyond Sports, London, £400-£500 per day (Outside IR35)
£400 - £500 per day
Contract Spy London, UK
iOS Engineer - Contract (Outside of IR35) As an iOS Developer, you will have the opportunity to build and lead solutions that engage millions of sports fans worldwide. Working with a wide range of data sources and native technologies, building bespoke UI experiences for sports fans. At Pulselive, we pride ourselves in providing a collaborative environment that ensures we produce leading products across web and native applications. Contractor Outside of IR35 Day Rate: £400 - £500 per day   Responsibilities Being a self-sufficient individual contributor, breaking down work into manageable pieces, calling out blockers and dependencies and delivering solution in a timely manner Managing code releases to internal environments (dev, test); may also need to manage code release to external environments (production) Producing code to a high standard that not only functions correctly but can be...
Contract Spy
Feb 12, 2026
Hourly/Freelance
Data Engineer - AI Trainer at DataAnnotation, Remote, £Hourly Rate
Contract Spy London, UK
Join the DataAnnotation team and contribute to developing cutting-edge AI systems, while enjoying the flexibility of remote work and setting your own schedule. We are looking for a proficient Data Engineer to help advance AI development. As a member of DataAnnotation’s coding team, you’ll be part of a growing community of over 100,000 professionals — including front-end, back-end, full-stack, machine learning, and other engineers — who are driving real-world impact in AI development. Our platform offers an engaging blend of flexibility and challenge: you’ll work closely with state-of the art AI models to take on programming tasks that include creating and solving challenging coding problems, building beautiful apps with rich functionality, and synthesizing insights through data analysis and visualization. Your work directly contributes to refining intelligent systems that learn, adapt, and evolve. Some team members fit this work alongside a...
Contract Spy
Feb 12, 2026
Duration not stated
C++ Contractor at Data Intellect, Belfast, £Contract Rate
Contract Spy Belfast, UK
Company Description At Data Intellect , we thrive on solving complex data challenges in high-stakes environments. We’re a team of engineers, problem-solvers, and collaborators who believe in pushing boundaries, not egos. If you're a seasoned C++ Developer ready to lead, innovate, and make an impact, we want to hear from you. Job Description As a C++ Developer at [DI], you will focus on developing Front Office Trading software, primarily working within the market data development teams. You will gain exposure to the full software stack, using modern development tools and concepts to deliver high quality, best practice software solutions. This will involve working on the end-to-end development of low latency software components written in C++. Project responsibilities will range from design, architecture and development of greenfield projects to maintenance, latency tuning and enhancements. Qualifications 4+ years’ experience of C++ development...
Contract Spy
Feb 11, 2026
Duration not stated
iOS Engineer at Beyond Sports, London, £400-£500 per day (Outside IR35)
£400 - £500 per day
Contract Spy London, UK
iOS Engineer - Contract (Outside of IR35) As an iOS Developer, you will have the opportunity to build and lead solutions that engage millions of sports fans worldwide. Working with a wide range of data sources and native technologies, building bespoke UI experiences for sports fans. At Pulselive, we pride ourselves in providing a collaborative environment that ensures we produce leading products across web and native applications. Contractor Outside of IR35 Day Rate: £400 - £500 per day   Responsibilities Being a self-sufficient individual contributor, breaking down work into manageable pieces, calling out blockers and dependencies and delivering solution in a timely manner Managing code releases to internal environments (dev, test); may also need to manage code release to external environments (production) Producing code to a high standard that not only functions correctly but can be...
Contract Spy
Feb 05, 2026
Duration not stated
C++ Contractor at Data Intellect, Belfast, £Contract Rate
Contract Spy Belfast, UK
Company Description At Data Intellect , we thrive on solving complex data challenges in high-stakes environments. We’re a team of engineers, problem-solvers, and collaborators who believe in pushing boundaries, not egos. If you're a seasoned C++ Developer ready to lead, innovate, and make an impact, we want to hear from you. Job Description As a C++ Developer at [DI], you will focus on developing Front Office Trading software, primarily working within the market data development teams. You will gain exposure to the full software stack, using modern development tools and concepts to deliver high quality, best practice software solutions. This will involve working on the end-to-end development of low latency software components written in C++. Project responsibilities will range from design, architecture and development of greenfield projects to maintenance, latency tuning and enhancements. Qualifications 4+ years’ experience of C++ development...
Contract Spy
Feb 04, 2026
Duration not stated
iOS Engineer at Beyond Sports, London, £400-£500 per day (Outside IR35)
£400 - £500 per day
Contract Spy London, UK
iOS Engineer - Contract (Outside of IR35) As an iOS Developer, you will have the opportunity to build and lead solutions that engage millions of sports fans worldwide. Working with a wide range of data sources and native technologies, building bespoke UI experiences for sports fans. At Pulselive, we pride ourselves in providing a collaborative environment that ensures we produce leading products across web and native applications. Contractor Outside of IR35 Day Rate: £400 - £500 per day   Responsibilities Being a self-sufficient individual contributor, breaking down work into manageable pieces, calling out blockers and dependencies and delivering solution in a timely manner Managing code releases to internal environments (dev, test); may also need to manage code release to external environments (production) Producing code to a high standard that not only functions correctly but...
Contract Spy
Feb 04, 2026
Duration not stated
Product Engineer (Full Stack & AI-Native) at Sofa King Digital, Remote, £Contract Rate
Contract Spy Remote (Fleet, England, United Kingdom)
Job Posting: Product Engineer (Full Stack & AI-Native)     Location: Remote (UK-based preferred for timezone alignment) Type: Contract / Freelance (with potential for long-term partnership) Stage: Stealth Mode / Pre-Launch     The Opportunity We are a stealth-mode startup building a premium digital ecosystem designed to solve the Connectivity Paradox in the UK business market. We are bridging the gap between social networking and high-value transactional brokerage for business owners and investors. We are looking for a Product Engineer —not just a ticket-taker, but a builder who understands that code is a means to a business end. You will work directly with the Lead Product Manager/Architect to build, ship, and iterate on our MVP. This is not a traditional dev role. We embrace an Agentic SDLC . We don't want you typing boilerplate; we want you architecting solutions, utilizing AI tools (Copilot, Agents) to accelerate...
Contract Spy
Feb 02, 2026
Duration not stated
iOS Engineer at Pulselive, London, £400-£500 per day (Outside IR35)
£400 - £500 per day
Contract Spy London, UK
iOS Engineer - Contract (Outside of IR35) As an iOS Developer, you will have the opportunity to build and lead solutions that engage millions of sports fans worldwide. Working with a wide range of data sources and native technologies, building bespoke UI experiences for sports fans. At Pulselive, we pride ourselves in providing a collaborative environment that ensures we produce leading products across web and native applications. Contractor Outside of IR35 Day Rate: £400 - £500 per day   Responsibilities Being a self-sufficient individual contributor, breaking down work into manageable pieces, calling out blockers and dependencies and delivering solution in a timely manner Managing code releases to internal environments (dev, test); may also need to manage code release to external environments (production) Producing code to a high standard that not only functions correctly but...
Contract Spy
Jan 30, 2026
6 Months or more
Software Developer at TÜV SÜD, UK, 6 Months, £Contract Rate
Contract Spy UK
Software Developer - Contract At TÜV SÜD we are passionate about technology. Innovations impact our daily lives in countless ways, and we are dedicated to being a part of that progress. We test, we audit, we inspect, we advise. We never stop challenging ourselves for the safety of society and its people. We breathe technology, we strive for professional excellence, and we leave a mark. We take the future into our hands. We are TÜV SÜD. As a contract engineer you will be developing a software-based solution to a specific set of business problems with the support of a small team of full-stack software engineers. This solution will be aimed at ensuring TUV SUD is well placed to deliver future services in a timely, efficient and competitive manner.  You will be developing software that will be used internally to support the business as we push to digitize and automate our internal processes. You will...
Contract Spy
Jan 29, 2026
up to 6 Months
Angular Front-End Developer at SRT Marine Systems plc, Cardiff/Remote, 3 Months initial, £Contract Rate
Contract Spy Hybrid (Cardiff, Wales, United Kingdom)
Join Us at SRT Marine Systems as a Contract Angular Developer Job Title: Angular Front-End Developer Location: 1 day / week in Cardiff office Job Type: Contract, Full-Time Duration: 3mths initially Status and Rate: Outside of IR35, day rate. SRT Marine Systems plc (SRT) are a market leader in its domain of international marine surveillance technology and systems. We are respected, established and an ambitious multi-national company headquartered in the UK with a global customer base. The company has a global impact in the marine domain by leading the next generation of maritime domain awareness technologies, products and systems that significantly enhance, security, safety and environment protection and sustainability. Our customers are worldwide and range from the largest national coast guards to individual vessel owners. SRT is an exciting company where high quality results are rewarded. We are ambitious and are constantly seeking to innovate to deliver better products...
Contract Spy
Jan 29, 2026
6 Months or more
Front End Developer at Department for Work & Pensions, UK Offices, 12 Months, £Contract Rate
Contract Spy UK
As a Senior Front-End Developer, you will be an expert in building high-quality, user-centric web applications and a role model in front-end craftsmanship. You'll lead by example, ensuring best practices in UI development, accessibility, and performance are consistently applied across the team. You will work closely with designers, architects, and engineering teams to create responsive, accessible, and visually engaging interfaces that power citizen-facing services. Your focus will be on delivering seamless user experiences while maintaining operational stability, scalability, and maintainability.   Key Responsibilities: Develop and maintain modern, responsive, and accessible front-end applications using Node.js to integrate with JavaScript and frameworks such as React, Angular, or Vue. Champion best practices in HTML, CSS (including modern methodologies like BEM or CSS-in-JS), and JavaScript/TypeScript. Ensure cross-browser compatibility, performance...
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