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84 api developer jobs found

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Contract Spy
Apr 02, 2026
Duration not stated
.Net Developer at P92 Group UK Limited, London EC2A, £450-£750 per day
£450 - £750 per day
Contract Spy London EC2A, UK
Job Overview We are currently seeking a .NET Developer for a contractor role based in our UK office. The .NET Developer will be designing, developing, and testing software applications. Additionally, they will maintain existing codebases, troubleshoot issues, and collaborate with cross-functional teams. P92 has been appointed as an External Software Development Partner. The ideal candidate will have a strong technical background, with expertise in modern .Net stack, and possess a systems-thinking approach to understand the entire process comprehensively. The ideal candidate will be an experienced .Net contractor that is able to switch context quickly and hit the ground running. We expect a positive attitude, along with a high level of commitment and responsibility, to be agile and dedicated to high quality work. Education BSc / MSc degree in Computer Science, Information Engineering or a related subject or equivalent experience Experiences Minimum 3-5...
Contract Spy
Apr 01, 2026
Duration not stated
Salesforce Solution Architect at Technopride Ltd, London, £Apply with Rate
Contract Spy London, UK
Role: Salesforce Solution Architect Location: London, UK Is it Permanent / Contract: FTC for 12months or contract inside IR35 Rate/Salary: Submit at best rate in the market; lowest rate will be considered first. Is it Onsite/Remote/Hybrid: 4 days per week from office Role Overview We are seeking an experienced Salesforce Solution Architect to provide architectural leadership within Agile Scrum teams delivering enterprise-scale solutions on the Salesforce platform. This role focuses on translating business requirements into scalable, secure, and maintainable technical solutions aligned with Salesforce best practices. Working closely with Product Owners, Business Analysts, Developers, and key stakeholders, you will shape solution design, guide technical delivery, and ensure optimal use of Salesforce capabilities. You will champion the “art of the possible” within Salesforce, prioritising out-of-the-box functionality while ensuring...
Contract Spy
Mar 30, 2026
up to 6 Months
Fullstack Product Engineer at IconicShift, Remote, to 7/26, £Contract Rate
Contract Spy Remote (London, UK)
About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit...
Contract Spy
Mar 30, 2026
Duration not stated
Full Stack Developer at School Prom Car Hire, London, £Contract Rate
Contract Spy London, UK
About School Prom Car Hire School Prom Car Hire is a premium luxury transport and travel platform operating across the UK and internationally. We specialise in limousine hire, yacht charters, private aviation, chauffeur services, airport transfers, and high-end event transport. Our growth strategy is built on technical excellence, search dominance, automation, and scalable digital infrastructure. We are hiring a Senior Full-Stack Web Developer who understands how engineering decisions directly impact SEO performance, scalability, and long-term growth. The Role This position requires a true full-stack engineer — not just a WordPress developer. You will take ownership of our entire digital ecosystem, ensuring it is technically sound, search-optimised, secure, automated, and built for algorithm resilience. What You’ll Be Responsible For Full-Stack Development Front-end and back-end development Building scalable web applications...
Contract Spy
Mar 26, 2026
Duration not stated
Java Full-Stack Lead Developer at Synechron, London, £Contract Rate
Contract Spy London, UK
About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced (10+ years ) Java Full-Stack Lead Developer with strong system architecture expertise to lead the design and delivery of scalable, distributed systems. This is a hands-on leadership role where you will define architecture, guide a globally distributed engineering team, and ensure high standards in both Back End and Front End development. Key Responsibilities Lead the architecture design of complex, scalable and high-availability systems Make critical decisions on system design, tech stack, and trade-offs Drive end-to-end development across Back End and Front End...
Contract Spy
Mar 25, 2026
Duration not stated
Salesforce Solution Architect at Technopride Ltd, London, £Apply with Rate
Contract Spy London, UK
Job Information Date Opened 24/03/2026 About Us We provide end-to-end IT solutions and services including Applications services, Data & Analytics services, AI/ML Technologies and Professional services in the UK and EU market.    Job Description Role: Salesforce Solution Architect Location: London, UK Is it Permanent / Contract: FTC for 12months or contract inside IR35 Rate/Salary: Submit at best rate in the market; lowest rate will be considered first. Is it Onsite/Remote/Hybrid: 4 days per week from office Role Overview We are seeking an experienced Salesforce Solution Architect to provide architectural leadership within Agile Scrum teams delivering enterprise-scale solutions on the Salesforce platform. This role focuses on translating business requirements into scalable, secure, and maintainable technical solutions aligned with Salesforce best practices. Working closely with Product Owners,...
Contract Spy
Mar 23, 2026
Duration not stated
Full Stack Developer at School Prom Car Hire, London, £Contract Rate
Contract Spy London, UK
About School Prom Car Hire School Prom Car Hire is a premium luxury transport and travel platform operating across the UK and internationally. We specialise in limousine hire, yacht charters, private aviation, chauffeur services, airport transfers, and high-end event transport. Our growth strategy is built on technical excellence, search dominance, automation, and scalable digital infrastructure. We are hiring a Senior Full-Stack Web Developer who understands how engineering decisions directly impact SEO performance, scalability, and long-term growth. The Role This position requires a true full-stack engineer — not just a WordPress developer. You will take ownership of our entire digital ecosystem, ensuring it is technically sound, search-optimised, secure, automated, and built for algorithm resilience. What You’ll Be Responsible For Full-Stack Development Front-end and back-end development Building scalable web applications...
Contract Spy
Mar 23, 2026
Duration not stated
Fullstack Product Engineer at IconicShift, London, £Contract Rate
Contract Spy London, UK
About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit acceptance of core strategic bets, ensuring...
Contract Spy
Mar 16, 2026
Duration not stated
Full Stack Developer at School Prom Car Hire, London, £Contract Rate
Contract Spy London, UK
About School Prom Car Hire School Prom Car Hire is a premium luxury transport and travel platform operating across the UK and internationally. We specialise in limousine hire, yacht charters, private aviation, chauffeur services, airport transfers, and high-end event transport. Our growth strategy is built on technical excellence, search dominance, automation, and scalable digital infrastructure. We are hiring a Senior Full-Stack Web Developer who understands how engineering decisions directly impact SEO performance, scalability, and long-term growth. The Role This position requires a true full-stack engineer — not just a WordPress developer. You will take ownership of our entire digital ecosystem, ensuring it is technically sound, search-optimised, secure, automated, and built for algorithm resilience. What You’ll Be Responsible For Full-Stack Development Front-end and back-end development Building scalable web applications...
Contract Spy
Mar 13, 2026
Duration not stated
Mid-Senior Full-Stack WordPress Developer - London at Sunny Art Centre, London WC2B 4AN, £35 an hour
Contract Spy London WC2B 4AN, UK
£35 per Hour London WC1V In-House 16–24 Hours per Week Sunny Art Centre is seeking a Mid–Senior Full-Stack WordPress Developer to join our in-house creative and technical team on a part-time freelance basis . This role is ideal for an experienced developer who enjoys working in a creative arts environment and wants to take long-term ownership of a high-profile cultural website. You will work from our open-plan gallery and studio space in central London (WC1V) , surrounded by an exceptional collection of Old Master artworks from both Western and Eastern traditions. The Role You will be responsible for the ongoing development, maintenance, performance, security, and scalability of Sunny Art Centre’s official WordPress website. This includes both front-end and back-end development , plugin and theme management, staging workflows, third-party integrations, and performance optimisation. This is a hands-on,...
Contract Spy
Mar 10, 2026
up to 6 Months
Azure Cloud Developer at Satalia, Remote/London, 3 Months +, £Contract Rate
Contract Spy Remote (London, UK)
Azure Cloud Developer Contract 3 months + Role type: Contract Location: UK, London, Remote Preferred start date: ASAP LIFE AS A SATALIAN As an organisation, we push the boundaries of data science, optimisation and artificial intelligence to solve the most complex problems in industry. Satalia, a WPP Company, is a community of individuals devoted to working on diverse and challenging projects, allowing you to flex your technical skills whilst working with a tight knit team of high performing colleagues. Led by our founder (who is also WPP’s Chief AI Officer), Satalia’s ambition is to become a decentralised organisation of the future. Today this involves developing tools and processes to liberate and automate manual repetitive tasks, with a focus on freedom, transparency and trust. At the core of our thinking is an approach to wellbeing and inclusivity. We unpack human behaviour and unpick prejudice to ensure a safe and inviting environment. We...
Contract Spy
Mar 09, 2026
Duration not stated
Senior KDB Developer - Global eTrading | London, UK at Delta Capita, London, £Competitive Rate
Contract Spy London, UK
Senior KDB Developer - Global eTrading Location : London, Hybrid Role Type : 12 Month Contract Rate : £700 - £1000 per day This is a client facing role working in a specialised team responsible for building and enhancing a high-performance eTrading MI and Analytics platform. The platform captures, stores, and analyses extremely large volumes of real-time and historical data over 3TB / 5 billion records daily from multiple electronic trading venues, internal pricing streams, and execution systems. The team provides the golden source of MI, analytics, and quantitative research support for global stakeholders across risk, quant, trading, and sales. The platform also underpins regulatory reporting, large-scale data processing pipelines, and backtesting workflows. This is a high performance, globally distributed environment, running hundreds of concurrent production services with multiple daily releases. Key...
Contract Spy
Mar 09, 2026
Duration not stated
Full Stack Developer at School Prom Car Hire, Surbiton KT6 7NA, £Contract Rate
Contract Spy Hook Rise S, Surbiton KT6 7NA, UK
About School Prom Car Hire School Prom Car Hire is a premium luxury transport and travel platform operating across the UK and internationally. We specialise in limousine hire, yacht charters, private aviation, chauffeur services, airport transfers, and high-end event transport. Our growth strategy is built on technical excellence, search dominance, automation, and scalable digital infrastructure. We are hiring a Senior Full-Stack Web Developer who understands how engineering decisions directly impact SEO performance, scalability, and long-term growth. The Role This position requires a true full-stack engineer — not just a WordPress developer. You will take ownership of our entire digital ecosystem, ensuring it is technically sound, search-optimised, secure, automated, and built for algorithm resilience. What You’ll Be Responsible For Full-Stack Development Front-end and back-end development Building scalable web applications Working across...
Contract Spy
Mar 09, 2026
Duration not stated
Fullstack Product Engineer at IconicShift, London, £Contract Rate
Contract Spy London, UK
About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit acceptance of core strategic bets, ensuring...
Contract Spy
Apr 02, 2026
Duration not stated
Senior Java Developer (AI-Focused) at Synechron, London, £Contract Rate
Contract Spy London, UK
About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced Senior Java Developer with over 10 years of hands-on Java development experience and extensive exposure to AI/ML-driven systems . The ideal candidate will design, build, and scale enterprise-grade applications while integrating modern AI capabilities such as machine learning models, generative AI, and intelligent automation into Back End systems. Key Responsibilities Design, develop, and maintain high-performance, scalable Java applications using modern frameworks. Architect and implement AI-enabled solutions , integrating ML/AI models into Java-based platforms....
Contract Spy
Apr 02, 2026
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London/Remote, £Freelance Rate
Contract Spy Hybrid (London, UK)
About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at...
Contract Spy
Mar 26, 2026
Duration not stated
Senior Java Developer (AI-Focused) at Synechron, London, £Contract Rate
Contract Spy London, UK
About Synechron: Synechron is a leading digital transformation consulting firm dedicated to delivering innovative technology solutions within banking, financial services, and insurance. We thrive on engineering excellence, collaboration, and a passion for cutting-edge technologies. Job Location: London (Hybrid - 3 days in the office) About the role: We are seeking a highly experienced Senior Java Developer with over 10 years of hands-on Java development experience and extensive exposure to AI/ML-driven systems . The ideal candidate will design, build, and scale enterprise-grade applications while integrating modern AI capabilities such as machine learning models, generative AI, and intelligent automation into Back End systems. Key Responsibilities Design, develop, and maintain high-performance, scalable Java applications using modern frameworks. Architect and implement AI-enabled solutions , integrating ML/AI models into Java-based platforms....
Contract Spy
Mar 19, 2026
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London/Remote, £Freelance Rate
Contract Spy London, UK
About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps...
Contract Spy
Mar 19, 2026
Hourly/Freelance
AI-Enabled Fullstack Developer at Future Works, Remote, £Freelance Rate
Contract Spy Remote (London, UK)
Description Future Works is searching for a results-driven, AI-Enabled Fullstack Engineer with strong end-to-end experience building custom software solutions. In this role, you will own the development and delivery of scalable, production-grade applications, from architecture through deployment, ensuring solutions are aligned with client requirements and business objectives.   Working within an agentic engineering environment, you will collaborate closely with product managers, designers, and stakeholders to translate business goals into robust technical implementations. By leveraging modern AI-assisted development tools, you will increase the speed and quality of delivery while maintaining strong engineering standards and architectural discipline.   What You’ll Do Design and build production-grade applications with React and Next.js Translate product and client requirements into structured implementation plans...
Contract Spy
Mar 16, 2026
6 Months or more
AI-First Full Stack Developer at ISTARI, London, 6 Months initial, £500–700 per day
£500 - £700 per day
Contract Spy London Area, United Kingdom
About Us: ISTARI is a strategic cybersecurity advisory company with a bold vision; to curate the defining cybersecurity ecosystem of our time, uniting enterprise, academia, government, and innovators to build collective resilience. At the heart of this mission, ISTARI helps clients achieve lasting organisational cyber resilience by convening and applying world-class talent, expertise, and innovation through a uniquely powerful network, with ISTARI as the central orchestrator. ─────────────────────────────────────────────────────── The Opportunity: We are seeking an entrepreneurial, AI-native developer to join ISTARI as a contract developer and help transform how we deliver our consulting work. You will be the founding technical resource responsible for building a suite of AI-powered internal tools that dramatically improve productivity across our Advisory practice.   This is not a traditional development role. You will be expected to leverage AI coding...
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