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200 software engineer jobs found

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Contract Spy
Jul 02, 2026
Duration not stated
Software Engineer - AI Trainer - Remote - 8/20 hrs week - Freelance at 10x Team, London, £60 - £110 an hour
£400 - £800 per day
Contract Spy Remote (London, UK)
Updated: 21 June 2026 Freelance 8–20 hrs/week Remote (EU/UK)   Are you an experienced software engineer who instinctively spots gaps in technical reasoning and understands the complex realities of software development? Do you have 8 to 20 hours per week available alongside your main job or freelance projects? Join us in shaping how AI understands and applies software engineering expertise at scale.   About the Role 10x.team connects expert freelancers with leading AI labs building next-generation models. We are looking for knowledgeable software engineers based in the EU or UK to enhance the accuracy, depth, and real-world relevance of AI-powered engineering systems.   What You Will Do Review and refine AI-generated outputs related to software engineering, technical documentation, code quality, and practical aspects of software development Evaluate AI responses for technical accuracy, practicality, and alignment...
Contract Spy
Jul 01, 2026
6 Months or more
Java Python Flask software Engineer at Office for National Statistics, Newport, 14 Months, £Contract Rate
Contract Spy Newport PO30, UK
On behalf of ONS , we are looking for a Software Engineer (GCP, Java) (INSIDE IR35) for a 14 month contract based Remotely with occasional travel to the Newport office . The Office for National Statistics (ONS) is the UK's largest producer of official statistics, covering a range of key economic, social and demographic topics. These include measuring changes in the value of the UK economy, estimating the size, geographic distribution and characteristics of the population, and providing indicators of price inflation, employment, earnings, crime and migration. SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active security clearance.  As a...
Contract Spy
Jul 01, 2026
Duration not stated
Lead Software Engineer - London Based at Vaco by Highspring, London, £Contract Rate
Contract Spy London, UK
Determining compensation for this role (and others) at Vaco/Highspring depends upon a wide array of factors including but not limited to the individual’s skill sets, experience and training, licensure and certifications, office location and other geographic considerations, as well as other business and organizational needs. With that said, as required by local law in geographies that require salary range disclosure, Vaco/Highspring notes the salary range for the role is noted in this job posting. The individual may also be eligible for discretionary bonuses, and can participate in medical, dental, and vision benefits as well as the company’s 401(k) retirement plan.Additional disclaimer:Unless otherwise noted in the job description, the position Vaco/Highspring is filing for is occupied. Please note, however, that Vaco/Highspring is regularly asked to provide talent to other organizations. By submitting to this position, you are agreeing to be included in our talent pool for future...
Contract Spy
Jul 01, 2026
Duration not stated
Senior Software Engineer (Full-Stack) — AI Training | Remote | Mercor at Soji Studio, Remote, $80-$130/hr
Contract Spy Remote
Job Title: Senior Software Engineer (Full-Stack) Type: Contract Compensation: $80-$130 per hour Location: Remote Commitment: Minimum 8 hours/day Key Responsibilities Development: Design, develop, and maintain robust full-stack applications. System Integration: Build and integrate APIs and MCP-based systems. Collaboration: Collaborate closely with cross-functional engineering and product teams. Code Quality: Write clean, scalable, and production-ready code. Optimization: Troubleshoot, optimize, and continuously improve application performance. Architecture: Actively participate in architecture and technical design discussions. Required Qualifications Experience: Multiple years of experience as a Full Stack Developer, with a proven track record of building and maintaining production-grade applications. Technical Proficiency: Strong proficiency in Python, combined with solid experience in MCP and API...
Contract Spy
Jun 30, 2026
Duration not stated
Senior Software Engineer - £day rate (outside IR35) at Red Badger, London, £Contract Rate
Contract Spy London, UK
Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Fullstack Experience Tech Stack - Kotlin Backend, JS/TS React Frontend Start date ASAP Duration 6 months (Likely to extend) 2/3 days / week in person working (London) Immediate Interviews The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages. Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning. We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the brilliant community around us. We run several...
Contract Spy
Jun 26, 2026
Duration not stated
Embedded Software Engineer at Pragmatic Design Solution, Coventry, £Contract Rate
Contract Spy Coventry, UK
Embedded Software Engineer Education : Bachelor’s/Master’s in Electronics & Communication Engineering. Experience: 0 to 3 Yrs Preferred Location : Resident engineer tobe located in PDSL Knowledge Centre, Warwick Science Park, Coventry, UK Core Skills Good proficiency in Embedded C and C++ . Hands-on experience with at least one of the Micro-Controllers such as STM32, NXP, MicroChip, AVR, or ESP32. Understanding of Real-Time Operating Systems and development on bare metal. Ability to implement and debug communication protocols like I2C, SPI, UART, and CAN. Could understand and read Schematics and datasheets. Experience using GDB/JTAG/SWD debuggers, and Logic Analyzers/Oscilloscopes. Note : Position offers a competitive salary or day rate, available as permanent or contract roles (outside IR35).
Contract Spy
Jun 26, 2026
Duration not stated
Principal Software Engineer at pubGENIUS, Deutschland, £Contract Rate
Contract Spy United Kingdom
pubGENIUS is a React.js and Next.js development agency and ad-tech startup. We build websites and apps for clients across the US and Europe, specializing in decentralized finance (DeFi, crypto, NFT, blockchain), fintech, and healthcare, with occasional work in e-commerce and other verticals. Beyond client work, we operate our own high-revenue web product with a website, mobile app, and machine learning systems powering our ad-tech optimization engine. Performance is not a preference here, it is a core requirement. We are looking for a Principal Software Engineer, who will be the technical authority, responsible for all development, architecture decisions, and long-term technical strategy across a website, mobile app, and ML-powered ad-tech optimization systems. This is a full-time independent contractor engagement. You will work hands-on at a senior level where site speed and server performance are core success metrics. You will work directly with stakeholders to...
Contract Spy
Jun 25, 2026
Duration not stated
Software Engineer - AI Trainer - Remote - 8/20 hrs week - Freelance at 10x Team, London, £60 - £110 an hour
Contract Spy Remote (London, UK)
Updated: 21 June 2026 Freelance 8–20 hrs/week Remote (EU/UK) Are you an experienced software engineer who instinctively spots gaps in technical reasoning and understands the complex realities of software development? Do you have 8 to 20 hours per week available alongside your main job or freelance projects? Join us in shaping how AI understands and applies software engineering expertise at scale. About the Role 10x.team connects expert freelancers with leading AI labs building next-generation models. We are looking for knowledgeable software engineers based in the EU or UK to enhance the accuracy, depth, and real-world relevance of AI-powered engineering systems. What You Will Do Review and refine AI-generated outputs related to software engineering, technical documentation, code quality, and practical aspects of software development Evaluate AI responses for technical accuracy, practicality, and alignment with real-world...
Contract Spy
Jun 24, 2026
6 Months or more
Senior Software Engineer (Python) at Ministry of Justice, London, 6 Months, £Contract Rate
Contract Spy London, UK
On behalf of The Ministry of Justice, we are looking for a Senior Software Engineer (Python) (Inside IR35) for a 6 Month contract based Remotely with the occasional travel to any MOJ office. . The Ministry of Justice (MoJ) priorities include improving public safety and reducing reoffending by reforming prisons, probation and youth justice, and building a justice system which makes access to justice swifter and more certain for all citizens whatever their background. Project professionals in the MoJ help to improve the government's ability to protect the public and reduce reoffending, and to provide a more effective, transparent and responsive criminal justice system for victims and the public. SC Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ)...
Contract Spy
Jun 23, 2026
Duration not stated
Senior Software Engineer - £day rate (outside IR35) at Red Badger, London, £Contract Rate
Contract Spy London, UK
Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Fullstack Experience Tech Stack - Kotlin Backend, JS/TS React Frontend Start date ASAP Duration 6 months (Likely to extend) 2/3 days / week in person working (London) Immediate Interviews The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages. Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning. We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the brilliant community around us. We run several...
Contract Spy
Jun 22, 2026
Duration not stated
Senior Software Engineer (Contract) at Softwire, London Area, £500-£650 per day
£500 - £650 per day
Contract Spy London Area, United Kingdom
Senior Software Engineer - Outside IR35 - Contract (Insurance) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Frontend: React + TypeScript + Vite Material UI with Emotion for styling TanStack React Query 5 for server state React Router 7 React Hook Form+Yup for forms/validation MSAL for Entra ID auth Jest+Testing Library for unit tests; Playwrightfor E2E and visual tests Hosted as an Azure Static...
Contract Spy
Jun 22, 2026
Duration not stated
Contract AI Software Engineer at GlobalLogic UK&I, London, £Contract Rate
Contract Spy London, UK
We are GlobalLogic, a Hitachi Group Company and a leader in digital engineering. We help brands across the globe design and build innovative products, platforms, and digital experiences for the modern world. By integrating experience design, complex engineering, and data expertise - we help our clients imagine what's possible and accelerate their transition into tomorrow's digital businesses. At GlobalLogic, we have a strong track record of successfully delivering ground-breaking Cloud, Data & Digital Transformation programmes and we have an international reach working with a wide variety of projects and customers. Our approach enables companies to build the exceptional and be fit for purpose in the 21st century. We are seeking to hire an experienced Contract Software Engineer/AI Platform Software Engineer into our project team. This is a 12 month assignment (inside IR35), to start 2-4 weeks. This is a hands on, high impact role at the intersection of AI governance,...
Contract Spy
Jun 19, 2026
6 Months or more
Lead Software Engineer at Department for Work & Pensions, UK Wide, 12 months, £Contract Rate
Contract Spy United Kingdom
On behalf of DWP we are looking for a Lead Software Engineer for a 12 month (Inside IR35) contract. Hybrid working based in either Birmingham, Blackpool, Manchester, Leeds or Newcastle.  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,...
Contract Spy
Jun 19, 2026
Duration not stated
Principal Software Engineer at pubGENIUS, Deutschland, £Contract Rate
Contract Spy United Kingdom
pubGENIUS is a React.js and Next.js development agency and ad-tech startup. We build websites and apps for clients across the US and Europe, specializing in decentralized finance (DeFi, crypto, NFT, blockchain), fintech, and healthcare, with occasional work in e-commerce and other verticals. Beyond client work, we operate our own high-revenue web product with a website, mobile app, and machine learning systems powering our ad-tech optimization engine. Performance is not a preference here, it is a core requirement. We are looking for a Principal Software Engineer, who will be the technical authority, responsible for all development, architecture decisions, and long-term technical strategy across a website, mobile app, and ML-powered ad-tech optimization systems. This is a full-time independent contractor engagement. You will work hands-on at a senior level where site speed and server performance are core success metrics. You will work directly with stakeholders to...
Contract Spy
Jun 19, 2026
Duration not stated
Embedded Software Engineer at Pragmatic Design Solution, Coventry, £Contract Rate
Contract Spy Coventry, UK
Embedded Software Engineer Education : Bachelor’s/Master’s in Electronics & Communication Engineering. Experience: 0 to 3 Yrs Preferred Location : Resident engineer tobe located in PDSL Knowledge Centre, Warwick Science Park, Coventry, UK Core Skills Good proficiency in Embedded C and C++ . Hands-on experience with at least one of the Micro-Controllers such as STM32, NXP, MicroChip, AVR, or ESP32. Understanding of Real-Time Operating Systems and development on bare metal. Ability to implement and debug communication protocols like I2C, SPI, UART, and CAN. Could understand and read Schematics and datasheets. Experience using GDB/JTAG/SWD debuggers, and Logic Analyzers/Oscilloscopes. Note : Position offers a competitive salary or day rate, available as permanent or contract roles (outside IR35).
Contract Spy
Jun 18, 2026
Duration not stated
Software Engineer - AI Trainer - Remote - 8/20 hrs week - Freelance at 10x Team, London, £60 - £110 an hour
Contract Spy Remote (London, UK)
Updated: 11 June 2026 Freelance 8–20 hrs/week Remote (EU/UK) Are you an experienced software engineer who instinctively spots gaps in technical reasoning and understands the complex realities of software development? Do you have 8 to 20 hours per week available alongside your main job or freelance projects? Join us in shaping how AI understands and applies software engineering expertise at scale. About the Role 10x.team connects expert freelancers with leading AI labs building next-generation models. We are looking for knowledgeable software engineers based in the EU or UK to enhance the accuracy, depth, and real-world relevance of AI-powered engineering systems. What You Will Do Review and refine AI-generated outputs related to software engineering, technical documentation, code quality, and practical aspects of software development Evaluate AI responses for technical accuracy, practicality, and alignment with real-world...
Contract Spy
Jun 17, 2026
Duration not stated
Senior Software Engineer at Softwire, London, £500-£650 per day (Outside IR35)
£500 - £650 per day
Contract Spy London, UK
About the job   Senior Software Engineer - Outside IR35 - Contract (Insurance)   About the role   Essential:   Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with)   Frontend:   React + TypeScript + Vite Material UI with Emotion for styling TanStack React Query 5 for server state React Router 7 React Hook Form+Yup for...
Contract Spy
Jun 16, 2026
Duration not stated
AI Software Engineer at GlobalLogic UK&I, London, £Contract Rate
Contract Spy London, UK
We are GlobalLogic, a Hitachi Group Company and a leader in digital engineering. We help brands across the globe design and build innovative products, platforms, and digital experiences for the modern world. By integrating experience design, complex engineering, and data expertise - we help our clients imagine what's possible and accelerate their transition into tomorrow's digital businesses. At GlobalLogic, we have a strong track record of successfully delivering ground-breaking Cloud, Data & Digital Transformation programmes and we have an international reach working with a wide variety of projects and customers. Our approach enables companies to build the exceptional and be fit for purpose in the 21st century. We are seeking to hire an experienced Contract Software Engineer/AI Platform Software Engineer into our project team. This is a 12 month assignment (inside IR35), to start 2-4 weeks. This is a hands on, high impact role at the intersection of AI governance,...
Contract Spy
Jun 16, 2026
6 Months or more
Senior Software Engineer at Red Badger, London, 6 Months, £Contract Rate (Outside IR35)
Contract Spy London, UK
Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Fullstack Experience Tech Stack - Kotlin Backend, JS/TS React Frontend Start date ASAP Duration 6 months (Likely to extend) 2/3 days / week in person working (London) Immediate Interviews   The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages.   Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning.   We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the brilliant community around...
Contract Spy
Jun 15, 2026
Hourly/Freelance
Software Engineer Analyst - AI Trainer at DataAnnotation, Remote, £Hourly Rate
Contract Spy Remote
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 Software Engineer Analyst 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...
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