1 to 25 of 203 Contract Software Engineering Jobs in the UK

Contract Software Engineer/Lead Developer - Expert The Role We're looking for an exceptional Software Engineer/Back-End Developer - a true "super dev" - with proven Design Patterns expertise and a deep understanding of software engineering/development. This is a high-level contract role, suitable for someone operating at a Principal Engineer or Lead … based. Rate: circa 680 per day (inside IR35) Duration: 6 months initially Start: ASAP September 2025 Key Responsibilities Lead the back-end development of a new platform. Apply advanced software engineering/development and design patterns Translate abstract concepts into working, production-ready solutions. Employ Test-Driven Development (TDD) and SOLID principles. Build robust, scalable algorithms and efficient … structures. Collaborate with other engineers, mentoring and sharing knowledge. Produce maintainable, clean code based on the "less is more" principle. Essential Skills & Experience Expert in TypeScript or a similar software development language , with strong back-end development experience. Extensive experience in applying well-known software design patterns. Proven ability to work independently with minimal guidance. Advanced algorithmic approach More ❯

Contract Software Engineer/Lead Developer - Expert The Role We're looking for an exceptional Software Engineer/Back-End Developer - a true 'super dev' - with proven Design Patterns expertise and a deep understanding of software engineering/development. This is a high-level contract role, suitable for someone operating at a Principal Engineer or Lead … based. Rate: circa £680 per day (inside IR35) Duration: 6 months initially Start: ASAP September 2025 Key Responsibilities Lead the back-end development of a new platform. Apply advanced software engineering/development and design patterns Translate abstract concepts into working, production-ready solutions. Employ Test-Driven Development (TDD) and SOLID principles. Build robust, scalable algorithms and efficient … structures. Collaborate with other engineers, mentoring and sharing knowledge. Produce maintainable, clean code based on the 'less is more' principle. Essential Skills & Experience Expert in TypeScript or a similar software development language , with strong back-end development experience. Extensive experience in applying well-known software design patterns. Proven ability to work independently with minimal guidance. Advanced algorithmic approach More ❯

Lead Software Engineer - AI/ML Data Platform (Test Engineering) Location: London Employment Type: 6month to 1 years contract A global financial services firm is seeking a Lead Software Engineer to join a cutting-edge initiative focused on building an enterprise-grade AI/ML Data Platform. This role is at the forefront of Test Engineering … mission to develop robust, intelligent validation frameworks and infrastructure that ensure the quality and reliability of machine learning and data products across the firm. This is a hands-on software engineering role Embedded in platform quality and reliability initiatives. You'll architect and build tools, services, and automation to elevate assurance across large-scale distributed systems. If you … CI/CD pipelines with integrated automated testing, resilience checks, and observability mechanisms. * Lead initiatives promoting platform testability, resilience, and validation-as-code principles. * Collaborate with MLOps, infrastructure, and software engineering teams to embed quality deeply into platform components. * Build reusable components that support scalability, modularity, and self-service quality tooling. * Mentor junior engineers and help set engineering More ❯

Contract: Software Engineering Manager - Greenfield Pension Platform Day Rate: £700 Outside IR35 Contract Industry: Financial Services Location: Bristol - Hybrid (1-2 days onsite) About the Role We are supporting a leading FTSE100 firm on a major greenfield initiative: the creation of a new and innovative pension product platform. This is a high-impact, long-term programme (running until … with significant opportunity to shape architecture, engineering practices, and delivery. The Software Engineering Manager will play a pivotal role, combining engineering management with elements of technical leadership. You'll work closely with senior stakeholders to define the technical roadmap, then lead and grow a cross-functional squad to deliver the platform. Key Responsibilities: Partner with the … Head of Software and Solution Architect to define the technical roadmap and architecture in the first 3 months. Guide and influence technical decisions, ensuring robust and scalable solutions. Build, manage, and support a cross-functional squad (5-7 engineers across front-end, back-end, BA, and solution architecture). Drive engineering best practices, mentoring and coaching team members. More ❯

potential for extension) Location: Gaydon, Warwickshire (Hybrid - typically 3 days on-site) Pay Rate: £33.00 per hour (Umbrella/Inside IR35) About Envisage: Envisage is a specialist in automotive engineering and design, delivering cutting-edge solutions for the future of mobility. We are seeking a highly skilled and motivated Senior Integration Engineer to join our dynamic team, working on … a next-generation vehicle platform. Role Purpose: To lead the diagnosis and resolution of complex software and systems issues during the development phase of a premium automotive vehicle platform. The successful candidate will be a key member of the Central Systems Integration team, responsible for planning and coordinating the delivery of integrated software from multiple ECUs to deliver … full vehicle features and systems. Key Duties and Responsibilities: • Lead the investigation and root cause analysis of systems and software issues within the vehicle development environment. • Determine the level of urgency for newly identified issues and initiate the appropriate response. • Ensure the accuracy and quality of data captured for Level 1 triage issue tickets, providing clear and concise problem More ❯

Principal Software Engineer (PLC) Location: Barrow, Cumbria (1-2 days on site each month) Duration: 12 months Rate: £50 per hour PAYE or £67.47 per hour Umbrella We are looking for a Software Engineer to be involved in designing, developing, and delivering cutting edge systems for the world's most advanced military submarines. Our client is recruiting a … Software Engineer to join the Integrated Systems PMS C&I team to be based at their site at Barrow In Furness, Cumbria. As a Principal Software Engineer, you will be able work to recognised industry standards to produce innovative, high quality software products. Working within a multi-disciplined team and utilising a variety of tools and programming … languages, you will engage in all aspects of the software development cycle from requirements elicitation through design, development and test. As a senior member of the team, you will be able to take responsibility for your own and others work as well as provide technical assistance to support the development of junior members of the team. You will take More ❯

Software Documentation Officer 12 month contract Based in Bristol Offering circa 65ph Inside IR35 Do you have experience with formal safety software? Do you have an understanding of the Software Engineering lifecycle? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for … you! As the Software Documentation Officer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. You will be involved in: Assist our software development teams with planning, documentation, configuration, and delivery Providing software input and configuration management Supporting multiple programmes Directly interfacing with software engineers and project leaders Supporting internal customer teams, such as Test and lab custodians Supporting the delivery of Integration deliverables Your skillset may include: Experience of software process in high-reliability, safety, or regulated sectors More ❯

Software Documentation Officer 12 month contract Based in Bristol Offering circa £65ph Inside IR35 Do you have experience with formal safety software? Do you have an understanding of the Software Engineering lifecycle? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for … you! As the Software Documentation Officer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. You will be involved in: Assist our software development teams with planning, documentation, configuration, and delivery Providing software input and configuration management Supporting multiple programmes Directly interfacing with software engineers and project leaders Supporting internal customer teams, such as Test and lab custodians Supporting the delivery of Integration deliverables Your skillset may include: Experience of software process in high-reliability, safety, or regulated sectors More ❯

Lead Software Engineer (Technical Lead) ?? Leeds, Manchester, or Newcastle | ?? 60% Office-Based (Hybrid) ? 12-Month Contract | ?? Up to £750/day (Umbrella) Make a Real Impact at a National Scale Our client, one of the UKs most high-profile government departments, are looking for someone to help shape the future of a critical public service supporting millions across the … country. Were looking for an outstanding Lead Software Engineer (Technical Lead) to provide hands-on leadership to digital delivery teams building and supporting core citizen and agent-facing services. This is your chance to play a pivotal role in transforming monolithic legacy systems into scalable, modern microservice architectures , backed by a forward-looking tech strategy. ?? What Youll Be Doing … Lead agile teams developing digital products or shared platform capabilities. Shape and influence strategy while delivering hands-on engineering support. Ensure best practices in software engineering, version control, and secure development. Champion technical excellence and ensure alignment to engineering standards. Mentor and guide engineers, fostering a culture of innovation and collaboration. Drive continuous improvement in service More ❯

Senior Software Engineer Location: Edinburgh (Hybrid) Contract: 6 Months (Initial) IR35 Status: Inside IR35 Our client, a leading organisation within the financial services sector, is seeking a highly motivated and experienced Senior Software Engineer to join their team on a 6-month initial contract. This role offers the opportunity to work on high-impact systems within a secure … high-availability environment, supporting the development of services hosted on Public Cloud platforms. Youll bring strong software engineering expertise, coupled with DevOps proficiency across AWS and GCP, to design and implement resilient frontend clients, backend services, infrastructure automation, and cloud-native solutions. Key Responsibilities Design, develop and maintain secure, performant backend REST API services and frontend clients using … Support live systems, conduct root cause analysis, and deliver solutions for incidents and performance bottlenecks. Skills & Experience Bachelors/Masters in Computer Science or equivalent experience. 5+ years in software engineering with experience in large-scale distributed systems. Proficient in Python and GoLang. Strong background in cloud technologies (AWS and/or GCP), networking, IAM, and cost optimisation. More ❯

World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a C++ Software Engineer subcontractor on an initial 12 month contract, with very likely extension. The role will be onsite 4 days per week. A 4 day working week is OK (Monday to Thursday). Candidates with a strong C++ Software Engineering/Embedded … Software Engineer background ideally from the Defence/Aerospace industry would be suitable for this position. Rate: £67.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at time and a quarter Location: Stevenage Hybrid/Remote working: The role will be onsite 4 days per week. A 4 day working week … with very likely extension. Contracts are often ongoing and long-term thereafter. IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview Job Description: By embracing the latest software technologies and methods the Development Simulation software department delivers exceptional software solutions for non-production based test systems that meet the unique requirements of the prime software More ❯

GoLang Developer London, UK 6 Month Contract An incredible opportunity for an experienced GoLang Developer with advanced backend engineering skills to join a prestigious tech client on a contract basis. This company is renowned for its engineering excellence, and they're looking for a GoLang Developer who can take their distributed systems to the next level. As a … GoLang Developer, you'll be working on mission-critical, data-intensive applications that push the boundaries of technology, taking ownership of the full software engineering lifecycle, including design, development, and implementation. Reporting into an Engineering Manager, the GoLang Developer will also leverage modern technologies like AWS, Kubernetes, Docker, and Kafka, whilst also architecting and implementing microservices-based … be responsible for optimising system performance, reliability, and scalability, as well as participating in code reviews, design discussions, and knowledge sharing. GoLang Developer - Key Requirements: Significant professional experience in software development, with a strong focus on backend systems Proficiency in Go/Golang and proven expertise in AWS, Kubernetes, and Docker Experience with end-to-end software engineering More ❯

Job title: Senior Software Engineer Location: Full Remote (Very occasional travel to offices in Cheshire) Type: Contract/Outside IR35/6 months initial duration + possible renewals About the Role We re looking for Senior Software Engineers to join our client's dynamic Engineering team and play a key role in building high-quality, scalable software solutions. As a senior member of the team, you ll take ownership of full-stack development, contribute to software architecture, drive engineering best practices, and mentor junior team members. You ll work closely with Product Owners, Architects, and DevOps to ensure delivery excellence across a diverse range of projects. What You'll Be Doing Software Development … Web APIs following best practices Use SQL Server, Entity Framework, and SQL for efficient data management Apply design patterns like OOP, SOLID, and Clean Code to write scalable code Engineering & Architecture Deliver high- and low-level estimations for projects Ensure software quality through unit and integration testing Perform code reviews and participate in pair programming Architect scalable, secure More ❯

Job title: Senior Software Engineer Location: Full Remote (Very occasional travel to offices in Cheshire) Type: Contract/Outside IR35/6 months initial duration + possible renewals About the Role We’re looking for Senior Software Engineers to join our client's dynamic Engineering team and play a key role in building high-quality, scalable software solutions. As a senior member of the team, you’ll take ownership of full-stack development, contribute to software architecture, drive engineering best practices, and mentor junior team members. You’ll work closely with Product Owners, Architects, and DevOps to ensure delivery excellence across a diverse range of projects. What You'll Be Doing Software Development … Web APIs following best practices Use SQL Server, Entity Framework, and SQL for efficient data management Apply design patterns like OOP, SOLID, and Clean Code to write scalable code Engineering & Architecture Deliver high- and low-level estimations for projects Ensure software quality through unit and integration testing Perform code reviews and participate in pair programming Architect scalable, secure More ❯

Job title: Senior Software Engineer Location: Full Remote (Very occasional travel to offices in Cheshire) Type: Contract/Outside IR35/6 months initial duration + possible renewals About the Role We're looking for Senior Software Engineers to join our client's dynamic Engineering team and play a key role in building high-quality, scalable software solutions. As a senior member of the team, you'll take ownership of full-stack development, contribute to software architecture, drive engineering best practices, and mentor junior team members. You'll work closely with Product Owners, Architects, and DevOps to ensure delivery excellence across a diverse range of projects. What You'll Be Doing Software Development … Web APIs following best practices Use SQL Server, Entity Framework, and SQL for efficient data management Apply design patterns like OOP, SOLID, and Clean Code to write scalable code Engineering & Architecture Deliver high- and low-level estimations for projects Ensure software quality through unit and integration testing Perform code reviews and participate in pair programming Architect scalable, secure More ❯

Contract AI Software Developer Duration: 6 months IR35 Status: Outside IR35 Location: Fully Remote Working Our client is seeking a skilled contract AI Software Developer to help shape and deliver artificial intelligent solutions in a modern .NET environment. You will be working fully remote and will focus on leveraging cutting edge AI tools across multiple areas of their … exciting product roadmap. The successful candidate will have an AI and .Net software engineering background ideally with historic experience with complex enterprise SaaS solutions. The role is deemed outside IR35. Key Responsibilities Design, develop, and deploy AI-powered features using C#/.NET technologies. Integrate AI and ML components into existing SaaS platforms. Collaborate with product and engineering … best practices and clean architecture. Key Skills Strong experience developing with .NET/C# in production environments. Proven track record of delivering or integrating AI/ML technologies into software solutions. Experience working with enterprise SaaS applications. Familiarity with integrating AI models into business processes. Familiarity with AI frameworks like ML.NET and/or Semantic Kernel is a big More ❯

Contract AI Software Developer Duration: 6 months IR35 Status: Outside IR35 Location: Fully Remote Working Our client is seeking a skilled contract AI Software Developer to help shape and deliver artificial intelligent solutions in a modern .NET environment. You will be working fully remote and will focus on leveraging cutting edge AI tools across multiple areas of their … exciting product roadmap. The successful candidate will have an AI and .Net software engineering background ideally with historic experience with complex enterprise SaaS solutions. The role is deemed outside IR35. Key Responsibilities Design, develop, and deploy AI-powered features using C#/.NET technologies. Integrate AI and ML components into existing SaaS platforms. Collaborate with product and engineering … best practices and clean architecture. Key Skills Strong experience developing with .NET/C# in production environments. Proven track record of delivering or integrating AI/ML technologies into software solutions. Experience working with enterprise SaaS applications. Familiarity with integrating AI models into business processes. Familiarity with AI frameworks like ML.NET and/or Semantic Kernel is a big More ❯

An incredible opportunity for an experienced Senior Backend Engineer with advanced Go skills to join a prestigious tech client on a contract basis. This company is renowned for its engineering excellence, and they're looking for a Senior Backend Engineer who can take their distributed systems to the next level. As a Senior Backend Engineer, you'll be working … on mission-critical, data-intensive applications that push the boundaries of technology, taking ownership of the full software engineering lifecycle, including design, development, and implementation. Reporting into an Engineering Manager, the Senior Backend Engineer will also leverage modern technologies like AWS, Kubernetes, Docker, and Kafka, whilst also architecting and implementing microservices-based solutions in collaboration with cross … for optimising system performance, reliability, and scalability, as well as participating in code reviews, design discussions, and knowledge sharing. Senior Backend Engineer (Go) - Key Requirements: Significant professional experience in software development, with a strong focus on backend systems Proficiency in Go/Golang and proven expertise in AWS, Kubernetes, and Docker Experience with end-to-end software engineering More ❯

An incredible opportunity for an experienced Senior Backend Engineer with advanced Go skills to join a prestigious tech client on a contract basis. This company is renowned for its engineering excellence, and they're looking for a Senior Backend Engineer who can take their distributed systems to the next level. As a Senior Backend Engineer, you'll be working … on mission-critical, data-intensive applications that push the boundaries of technology, taking ownership of the full software engineering life cycle, including design, development, and implementation. Reporting into an Engineering Manager, the Senior Backend Engineer will also leverage modern technologies like AWS, Kubernetes, Docker, and Kafka, whilst also architecting and implementing microservices-based solutions in collaboration with … for optimising system performance, reliability, and scalability, as well as participating in code reviews, design discussions, and knowledge sharing. Senior Backend Engineer (Go) - Key Requirements: Significant professional experience in software development, with a strong focus on Back End systems Proficiency in Go/Golang and proven expertise in AWS, Kubernetes, and Docker Experience with end-to-end software More ❯

rich solution that fits the client's requirements. Skills and Experience: c5 years full stack development experience in Java, with Object-Oriented Development (OOD) skills A strong understanding of software engineering patterns and practices (server-less, micro services etc.) Experience of working as part of an agile team, working with Continuous Delivery pipelines, tools and techniques (GitLab, Jenkins … checks. Role and Responsibilities: You will be working as part of an agile team to deliver the project to the required scope, using best practice service design, architecture and software engineering, along with Continuous Delivery techniques. You must be able to work with the client to accurately define requirements, ensuring adherence to modern software development practices is More ❯

and mentor a team of engineers, fostering a culture of technical excellence and continuous improvement Ensure delivery of high-quality, secure, and assured digital services Promote best practices in software engineering and cloud infrastructure Collaborate across disciplines and departments to ensure alignment and shared understanding Assess and manage the impact of technical changes across systems and teams Champion … organisation You may lead a team focused on: Developing agent or citizen-facing digital systems Building shared capabilities that support development, assurance, deployment, and operations. Essential Skills and Experience Software engineering (Java, microservices, Hexagonal architecture, MongoDB, Kafka) or cloud infrastructure & DevOps (AWS, Terraform, GitLab CI, Jenkins) Technical leadership , including team guidance, mentoring, and development Engineering best practices … in secure design, version control, and assurance Collaboration and knowledge sharing across engineering communities Delivering in complex environments , working with multidisciplinary teams and stakeholders to meet deadlines. **Security Clearance: BPSS but must be eligible for SC Clearance** Inside IR35: £650 - £750. Contract Length: 12 Months Working pattern: 60% in office - Leeds, Manchester OR Newcastle Please click here to find More ❯

LLM, or chat interface teams on content generation or governance. Comfort conducting or analyzing content-specific usability testing. About Us: Ascendion is a global, leading provider of AI-first software engineering services, delivering transformative solutions across North America, APAC, and Europe. We are headquartered in New Jersey. We combine technology and talent to deliver tech debt relief, improve … engineering productivity solutions, and accelerate time to value, driving our clients’ digital journeys with efficiency and velocity. Guided by our “Engineering to the power of AI” [EngineeringAI] methodology, we integrate AI into software engineering, enterprise operations, and talent orchestration, to address critical challenges of trust, speed, and capital. For more information With Ascendion, you: Will get More ❯

expertise in banking or fintech, with a strong grasp of regulatory requirements, trust signals, and accessibility best practices. About Us: Ascendion is a global, leading provider of AI-first software engineering services, delivering transformative solutions across North America, APAC, and Europe. We are headquartered in New Jersey. We combine technology and talent to deliver tech debt relief, improve … engineering productivity solutions, and accelerate time to value, driving our clients’ digital journeys with efficiency and velocity. Guided by our “Engineering to the power of AI” [EngineeringAI] methodology, we integrate AI into software engineering, enterprise operations, and talent orchestration, to address critical challenges of trust, speed, and capital. With Ascendion, you: Will get to work on More ❯

Contract An incredible opportunity for an experienced Backend Engineer with advanced Go skills to join a prestigious tech client on a contract basis. This company is renowned for its engineering excellence - and it's not just the tech stack or the day rate that stands out. Contractors here regularly speak highly of the fast-moving, collaborative culture where autonomy … are front and centre. As a Backend Engineer, you'll be working on mission-critical, data-intensive applications that push the boundaries of technology, taking ownership of the full software engineering lifecycle, including design, development, and implementation. You'll join a product-focused team that works in tight feedback loops - small pull requests, quick reviews, and fast iteration. … place where engineers are encouraged to leave things better than they found them, whether it's a piece of code, a flaky test, or a README. Reporting into an Engineering Manager, the Backend Engineer will leverage modern technologies like AWS, Kubernetes, Docker, and Kafka, while also architecting and implementing microservices-based solutions in collaboration with cross-functional teams. You More ❯

CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence/cyber security company £500 - £750 per day (inside and outside IR35 roles available) London based organisation in an easily accessible … location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R&D companies, Multi-National Consultancies to SME's and product based companies. Due to the nature of the work these clients do, you must hold enhanced … DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver packages of bespoke work, work development teams and liaise with customers. You will work through the entire software development life cycle from requirements capture to R&D, implementation to More ❯