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141 api developer jobs found

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Contract Spy
Jun 12, 2026
Hourly/Freelance
API Developer - 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 API Developer 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
Jun 05, 2026
Hourly/Freelance
API Developer - 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 API Developer 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
May 29, 2026
Hourly/Freelance
API Developer - 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 API Developer 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
Jun 03, 2026
Duration not stated
Java Developer – API & Playwright at Derisk360, Edinburgh/Remote, £Contract Rate
Contract Spy Hybrid (Edinburgh, Scotland, United Kingdom)
Java Developer – API & Playwright Company: Derisk360 Location: Edinburgh, UK Work Mode: Hybrid (2 Days Work from Office) Employment Type: Contract (Inside IR35) Experience Required: 7+ Years Overview Are you a passionate Java Developer with expertise in API development, Playwright automation, and modern software development practices? Join Derisk360 and contribute to building scalable, high-quality applications and automation frameworks that drive business success. We are looking for a proactive professional who thrives in a collaborative environment and is passionate about delivering reliable, secure, and efficient software solutions. Key Responsibilities Design, develop, and maintain scalable applications using Java. Develop and consume RESTful APIs and microservices. Build and maintain Playwright-based automation frameworks for UI and API testing. Participate in all phases of the Software Development Life Cycle (SDLC)....
Contract Spy
Jun 11, 2026
Duration not stated
Senior Android Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £400-£425 per day
£400 - £425 per day
Contract Spy Staines TW18, UK
400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior Android Developer to design, build, and maintain high-quality native Android applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred mobile experiences that meet Government Digital Service (GDS) standards and accessibility requirements. This is a hands-on technical role operating within...
Contract Spy
Jun 11, 2026
Duration not stated
Senior IOS Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £400-£425 per day
£400 - £425 per day
Contract Spy Staines TW18, UK
400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior iOS Developer to design, build, and maintain high-quality native iOS applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred mobile experiences that meet Government Digital Service (GDS) standards and accessibility requirements. This is a hands-on technical role operating within structured...
Contract Spy
Jun 04, 2026
Duration not stated
Senior IOS Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £400-£425 per day
£400 - £425 per day
Contract Spy Staines TW18, UK
400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior iOS Developer to design, build, and maintain high-quality native iOS applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred mobile experiences that meet Government Digital Service (GDS) standards and accessibility requirements. This is a hands-on technical role operating within structured...
Contract Spy
Jun 04, 2026
Duration not stated
Senior Android Developer at Scrumconnect Consulting, Staines-upon-Thames TW18, £400-£425 per day
£400 - £425 per day
Contract Spy Staines TW18, UK
400-425 inside ir 35 City Staines Province Surrey Country United Kingdom Postal Code TW18 Job Description About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to deliver innovative digital services that matter. Role Overview We are looking for a Senior Android Developer to design, build, and maintain high-quality native Android applications for a UK government client. You will work as part of a multidisciplinary agile team, delivering user-centred mobile experiences that meet Government Digital Service (GDS) standards and accessibility requirements. This is a hands-on technical role operating within...
Contract Spy
Jun 09, 2026
Hourly/Freelance
Full-Stack Web App Developer at Mindrift, Remote, £Freelance Rate
Contract Spy Remote (United Kingdom)
Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.ai/) and build interactive browser-based applications within our hybrid AI + human environment. In this role, as an AI Pilot - that 's how we refer to this position at Mindrift - you 'll collaborate with Tendem Agents that handle repetitive tasks, while you provide full-stack engineering expertise, architectural judgment, and quality control to ensure web apps are functional, robust, and ready for real users. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.   What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.  ...
Contract Spy
Jun 04, 2026
Hourly/Freelance
AI Native Shopify Developer at ZOEVA GmbH, Remote, 6-12 Months, £Freelance Rate
Contract Spy Remote (United Kingdom)
Job Title: AI-Native Shopify Developer (Freelance, 6–12 months) Department: Technology Location: Remote Position Type: Freelance · Project-based · Shopify Plus   Job Description: ZOEVA is a prestige EU+UK beauty brand with a fast-scaling DTC business on Shopify Plus. We run lean, move fast, and operate with AI embedded across our workflows — from analytics to campaign execution. We are looking for a senior Shopify developer who actively uses AI tools such as Claude Code and Codex as a core part of their development workflow — not as add-ons, but as the foundation of how they build, iterate, and ship code. This role involves taking AI-generated concepts, prototypes, or functional ideas and transforming them into clean, production-grade Shopify implementations that perform in a live environment.   Key Responsibilities: Architect and build within Shopify Plus across...
Contract Spy
May 28, 2026
Hourly/Freelance
Full-Stack Web App Developer at Mindrift, Remote, £Freelance Rate
Contract Spy Remote (United Kingdom)
Mindrift is looking for skilled Full-Stack Web App Developers (JavaScript/TypeScript + Python or Node) to join the Tendem project (https://tendem.ai/) and build interactive browser-based applications within our hybrid AI + human environment. In this role, as an AI Pilot - that 's how we refer to this position at Mindrift - you 'll collaborate with Tendem Agents that handle repetitive tasks, while you provide full-stack engineering expertise, architectural judgment, and quality control to ensure web apps are functional, robust, and ready for real users. This part-time remote opportunity is ideal for professionals with hands-on experience in modern frontend frameworks, backend APIs, databases, and shipping interactive web products end-to-end.   What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.  ...
Contract Spy
Jun 12, 2026
Duration not stated
Software Development Manager at AND Digital, UK, £Contract Rate
Contract Spy United Kingdom
We are recruiting for a Contract Software Development Manager for a duration of initially 6 months. This role is an immediate start. Who We Are: AND Digital are a tech company focused on accelerating digital delivery and dedicated to closing the digital skills gap. We've been helping organisations build better digital products and stronger digital teams since 2014. We believe our work should always make a remarkable impact for our clients. We do this through our regional offices (or 'Clubs') building strong relationships with our partners, so that they are always prioritised by a team within close proximity. This unique model has driven success for our clients and ourselves, evidenced by our remarkable organic growth since 2014. Today we number more than 1,300 people with Clubs all over the UK, Europe and the USA with plans for global expansion in the next couple of years. Join us - and help us fulfil our mission to close the world's digital skills gap. The Role:...
Contract Spy
Jun 12, 2026
Duration not stated
Senior Software Developer at ONYX Insight, Nottingham, £Contract Rate
Contract Spy Nottingham, UK
The Role Are you a senior backend engineer who thrives on distributed systems, clean architecture, and complex data problems? At ONYX Insight, we're looking for a Senior Software Developer (Contractor) to make an immediate impact on our core platform, a sophisticated distributed system processing data from wind turbines around the world. This is not a typical SaaS CRUD role. You'll work across a distributed architecture including asynchronous messaging, worker processes, and data ingestion pipelines. Frontend exposure is a bonus, not a requirement. Key Responsibilities: Backend Delivery: Implement robust, well-tested C# .NET services following clean architecture principles — domain logic, data access, messaging, and background processing. Distributed Systems: Contribute to service boundary design, asynchronous messaging flows, and worker processes within our modular monolith, with an eye on future decomposition. Data Pipelines: Build and...
Contract Spy
Jun 11, 2026
Duration not stated
QA Engineer/Test Lead - MVP Trading Platform at Wagglyn, London Area, £Contractor Rate
Contract Spy London Area, United Kingdom
Role Summary Wagglyn is looking for an experienced QA Engineer / Test Lead to work with the existing engineering team on the testing and release readiness of its MVP trading platform. This is a hands-on contract role for someone who has tested complex financial or real-time systems before. It is not a generic web QA role and not a manual-testing-only role.   Scope The contractor will help define and execute the QA process across the front end, backend services, market data, execution flows, deployment environments and operational readiness. The role involves working with engineering, product and stakeholders to make sure releases are testable, repeatable and safe to promote through UAT and production-like environments. QA here is about proving the system behaves safely when data is live, services reconnect, orders are sent, risk state changes and deployments happen.   Profile ·      Hands-on QA...
Contract Spy
Jun 11, 2026
Hourly/Freelance
Bot Developer at Mindrift, Remote, £Freelance Rate
Contract Spy Remote (United Kingdom)
Mindrift is looking for skilled Bot Developers (WhatsApp Business API, Telegram Bot API, Discord API) to join the Tendem project (https://tendem.ai/) and build conversational bots and messaging-platform integrations within our hybrid AI + human environment. In this role, as an AI Pilot - that 's how we refer to this position at Mindrift - you 'll collaborate with Tendem Agents that handle repetitive tasks, while you provide bot engineering expertise, conversational design judgment, and quality control to ensure bots are reliable, useful, and ready for real users. This part-time remote opportunity is ideal for professionals with hands-on experience building messaging bots, working with platform APIs and webhooks, and implementing conversational logic.   What We Do The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe....
Contract Spy
Jun 11, 2026
6 Months or more
Senior Full Stack Developer - Active SC at Ministry of Justice, UK Offices/Hybrid, 12 Months, £Contract Rate
Contract Spy Hybrid (United Kingdom)
HM Courts & Tribunals Service is responsible for the administration of criminal, civil and family Courts and Tribunals in England & Wales. Their roles support service users and colleagues within HMCTS, where people and businesses access potentially life-changing justice. We're looking for individuals who are committed to public service and making a difference in people's lives to deliver justice.   As a Senior Software Developer at HMCTS you will work with a wide range of stakeholders such as user researchers, product managers, designers, business analysts, delivery managers and digital architects, all of whom share a vision for making better government through smarter use of technology. You will innovate to radically transform public services for the better.   As a Senior Full Stack Developer your main responsibilities will be to:   Develop, improve and document code, following best practices and internal standards. Continuously...
Contract Spy
Jun 11, 2026
6 Months or more
Full Stack Developer - Active SC at Ministry of Justice, UK Offices/Remote, 12 Months, £Contract Rate
Contract Spy Hybrid (United Kingdom)
HM Courts & Tribunals Service is responsible for the administration of criminal, civil and family Courts and Tribunals in England & Wales. Their roles support service users and colleagues within HMCTS, where people and businesses access potentially life-changing justice. We're looking for individuals who are committed to public service and making a difference in people's lives to deliver justice.   As a Software Developer at HMCTS you will work with a wide range of stakeholders such as user researchers, product managers, designers, business analysts, delivery managers and digital architects, all of whom share a vision for making better government through smarter use of technology. You will innovate to radically transform public services for the better.   As a Full Stack Developer your main responsibilities will be to:   Develop, improve and document code, following best practices and internal standards. Continuously learn and stay up...
Contract Spy
Jun 11, 2026
Duration not stated
ServiceNow Developer — ITSM/Integrations at XAAS Solutions, Remote, £500-£560 per day
£500 - £560 per day
Contract Spy Remote (London, UK)
Job Summary We are looking for an experienced ServiceNow Developer to support ongoing ServiceNow ITSM development, enhancement, integration, and platform support work. The ideal candidate will have 5–6 years of hands-on ServiceNow experience , with strong technical knowledge of ITSM modules , including Incident Management, Problem Management, Change Management, Request Management, Service Catalog, and CMDB-related processes . This is a remote UK-based contract role , operating Inside IR35 , with a day rate of up to £560 per day . The candidate must be currently residing in the UK and must have the legal right to work in the UK without sponsorship, such as UK citizenship or Indefinite Leave to Remain (ILR) . ServiceNow certifications are preferred but not mandatory. Strong practical knowledge and hands-on implementation experience are essential. Key Responsibilities The ServiceNow Developer will be responsible for designing,...
Contract Spy
Jun 10, 2026
Duration not stated
Vue.js/Nuxt Developer at YO HR Consultancy, Remote, £Contractor Rate
Contract Spy Remote (United Kingdom)
Vue.js/Nuxt Developer Job Type : Contractor Location : Remote Role Description As a Vue.js / Nuxt Engineer, you will work remotely on an hourly paid basis to review AI-generated Vue/Nuxt code, frontend architectures, and technical explanations, as well as produce high-quality reference implementations and step-by-step reasoning for complex engineering problems. You will assess solutions for correctness, clarity, accessibility, security, performance, and adherence to the prompt; identify issues in Vue reactivity, component composition, state management, SSR/SSG, routing/data fetching, hydration, caching, and bundle performance; fact-check technical information; write high-quality explanations and model solutions that demonstrate best practices; and rate and compare multiple AI responses based on correctness and reasoning quality. This fully remote, hourly paid contractor role is a fast-growing AI data services company that provides AI training data to many of the...
Contract Spy
Jun 10, 2026
Duration not stated
Senior Developer at Scrumconnect, Taunton, £400-£425 per day (Outside IR35)
£400 - £425 per day
Contract Spy Hybrid (Taunton, UK)
£400-£425 Outside Ir35 City Taunton Province Somerset Country United Kingdom Postal Code TA1 Job Description   About Scrumconnect Consulting   Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful and innovative technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter.   Role Purpose Join a blended agile delivery squad working on large-scale, secure digital services for a government client. As a Senior Developer, you will bring strong hands-on experience across both .NET...
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