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46 api developer jobs found

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api developer Greater London
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Contract Spy
Jan 07, 2026
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. Analyse requirements and translate them into technical solutions especially around Integrations. Design, Build, and test applications ensuring high-quality delivery. Also, integral part of the Run/Ops team of Salesforce to help with BAU requests and maintain the...
Contract Spy
Jan 07, 2026
Duration not stated
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 31, 2025
Duration not stated
Cloud Developer at Satalia, London/Remote, £Contract Rate
Contract Spy London, UK
Cloud Developer Role type: Contract Location: UK 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 offer true flexible working and allow our...
Contract Spy
Dec 30, 2025
6 Months or more
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 19, 2025
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, UK
Salesforce Developer (Day Rate Contract) Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. • Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. • Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. • Analyse requirements and translate them into technical solutions especially around Integrations. • Design, Build, and test applications ensuring high-quality delivery. • Also, integral part of the Run/Ops...
Contract Spy
Dec 19, 2025
Duration not stated
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 16, 2025
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. Analyse requirements and translate them into technical solutions especially around Integrations. Design, Build, and test applications ensuring high-quality delivery. Also, integral part of the Run/Ops team of Salesforce to help with BAU requests and maintain the...
Contract Spy
Dec 12, 2025
6 Months or more
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 31, 2025
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London, £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
Dec 22, 2025
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London, £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
Dec 15, 2025
Hourly/Freelance
Android Developer for Digital Asset Marketplace App at Fliprly, London, £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
Dec 22, 2025
Hourly/Freelance
AI-Enabled Fullstack Developer at Future Works, Remote, £Freelance Rate
Contract Spy Remote (London, UK)
Description   Future Works is searching for a talented Fullstack Developer with a track record of building groundbreaking consumer products. As a key member of our team, you'll collaborate on exciting projects for top-tier brands, working alongside world-class designers.   Requirements Proven ability to deliver modern web projects from inception to deployment. Familiarity with LLMs (Large Language Models) and experience integrating AI-driven solutions into development processes. AI Native Mindset: A deep understanding of AI tools and technologies, with the ability to actively leverage and develop AI systems to optimize workflows, enhance creativity, and achieve exceptional results. Strong proficiency in JavaScript and TypeScript. 3+ years of experience working with React and Next.js. Expertise in styled-components, CSS/SCSS modules, Tailwind CSS, and shadcn. Experience implementing...
Contract Spy
Jan 07, 2026
Duration not stated
DevOps Engineer at Tokio Marine HCC, London, £Contract Rate (Outside IR35)
Contract Spy London, UK
Job Title: DevOps Engineer Reporting to: DevOps and Automation Manager Direct Reports: 0 Position Type: Contract, Outside IR35   Why Tokio Marine HCC? Standing still is not an option in the current world of Insurance. TMHCC is one of the world’s leading Specialty Insurers. With deep expertise in our chosen lines of business, our unparalleled track record and a solid balance sheet, TMHCC evaluates and manages risk like no one else in the industry. Looking beyond profit, empowering our people and delivering on our commitments are at the core of our customer values, along with a desire to grow and provide creative and innovative solutions to our clients.   About Operations Operations sits at the heart of TMHCC, we ensure the smooth running of all business processes – from policy administration and claims handling to data, technology, and delivery. We focus on driving efficiency which enables our teams across the...
Contract Spy
Jan 07, 2026
Duration not stated
Senior C#/.NET Developer at Fusion Practices Limited, London, £Contract Rate
Contract Spy London, United Kingdom
Overview We are seeking a Senior C#/.NET Developer to design, build, and lead the development of high-quality, scalable software solutions. This role combines hands-on engineering, technical leadership, and mentorship, playing a key role in architecture decisions and delivery excellence-particularly for systems that handle large, complex data sets and high-volume processing . Key Responsibilities Lead the design and development of applications using C#, .NET (.NET Core/.NET 6+) Design and optimize solutions that process and manage large-scale data sets with a focus on performance and scalability Define and enforce coding standards, architecture patterns, and best practices Architect scalable, secure, and maintainable solutions (monoliths or microservices) capable of handling high data throughput and concurrency Perform code reviews and mentor junior and mid-level developers Collaborate with product managers, architects, QA, and DevOps teams Translate...
Contract Spy
Jan 06, 2026
Duration not stated
Data Modeller at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities Operates in line with the Bank's Risk Management framework (including sub-frameworks) and relevant risk and compliance policies and procedures, ensuring appropriate and timely escalation of any concerns to their line manager. Designs logical data models in the Finance domain, aligned with the bank’s conceptual data model, to capture the organization's data requirements to support reporting, analytics, and operational use cases Collaborates with data stewards and subject matter experts to develop the logical data models aligned with business requirements when conceptual data models are not available and to confirm internal reference data in the Finance domain Inputs into the development of the bank’s conceptual data model and how it is applied. Works closely with Data and Solution Architects on projects to support the completion of High level solution architecture and Low level designs Collaborates with...
Contract Spy
Jan 06, 2026
Duration not stated
JUNIOR UI/UX DESIGNER at Digimasters Ltd, London, £150-£250 per day
£150 - £250 per day
Contract Spy London, UK
ABOUT DIGIMASTERS  Digimasters Ltd was founded in 2017 as a digital transformation consultancy focused on technology, business process optimisation and data analytics. Digimasters works across all industries and provides experience in organisations of all sizes. Primarily based in London, UK, we work in many regions including the US, EU, APAC and the Middle East. Digimasters takes on additional talent during large programmes of work. For our engagements with clients in Architecture, Engineering, and Construction (AEC), as well as other sectors, we have several roles supporting the delivery of technology, business change, and data programmes.  ROLE  We’re looking for an enthusiastic and motivated Junior UI/UX Designer to join our growing Digimasters team! This role is ideal for recent graduates looking to gain hands-on experience, build their design skills, and contribute to exciting digital transformation projects across a variety of industries.  As a Junior UI/UX...
Contract Spy
Jan 06, 2026
6 Months or more
Lead Fullstack Engineer at Mindera, London Paddington/Remote, 6 Months initial, £Contract Rate (Outside IR35)
Contract Spy Hybrid (Paddington, London, UK)
We are looking for a Lead Full-Stack Engineer to take technical ownership across backend and frontend development, shaping high-quality, scalable solutions and setting engineering standards for the team. This role combines hands-on delivery with technical leadership, mentoring, and close collaboration with product and platform teams. You will work across modern backend services built in Kotlin, rich frontend applications using React and Next.js with TypeScript, and cloud-native infrastructure on Azure or AWS.   This is an initial 6 month contract (outside iR35) that requires you onsite in London Paddington 3 days a week.   Key Responsibilities Lead the design and development of full-stack solutions, balancing backend robustness with high-quality user experiences Build and maintain backend services using Kotlin, following clean architecture and best practices Develop modern, performant frontends using React, Next.js, and TypeScript Take...
Contract Spy
Jan 06, 2026
6 Months or more
D365 Product Owner at Investec, London, 6 Months, £Contract Rate
Contract Spy London, UK
Investec is a distinctive Specialist Bank serving clients principally in the UK and South Africa. Our culture gives us our edge: we work hard to find colleagues who'll think out of the ordinary and we put them in environments where they'll flourish. We combine a flat structure with a focus on internal mobility. If you can bring an entrepreneurial spirit and a desire to learn and collaborate to your work, this could be the boost your career deserves.   Contract D365 Product Owner 6 month sabbatical cover Inside IR35   Investec are looking for an experienced senior Dynamics 365 Product Owner to join the D365 Digital & Technology team on a 6 month contract basis, supporting Investec Bank as we undertake a once-in-a-generation transformation to move to a fully cloud native & SaaS technology stack, entirely built on Azure. As part of this transformation, we are heavily leveraging D365 as the backbone of our business processes....
Contract Spy
Jan 05, 2026
Duration not stated
Technical Lead – Shopify Development at Ecomlanders, London Area, £Contract Rate
Contract Spy London Area, United Kingdom
Job Description: About Us We’re a Shopify design and development agency partnering with direct-to-consumer brands across multiple industries. We turn Figma designs into pixel perfect, high performing Shopify stores that help brands scale their online presence.   The Role We’re looking for a Mid-weight Shopify Developer ready to step up into a technical leadership role on a retainer basis.   This isn’t a hands-on coding position — you’ll oversee technical quality, consistency, and efficiency across our global development team.   Your role is to refine processes, set standards, and elevate developer output across all client projects.   Key Responsibilities Review and approve all code before deployment (pull requests, theme updates, custom builds) Establish coding standards and best practices that work across multiple client themes Build and maintain a library of reusable,...
Contract Spy
Jan 05, 2026
6 Months or more
Test Lead at Mindera, London Paddington, 6 Months, £Contract Rate (Outside IR35)
Contract Spy London, UK
We are looking for a Test Lead/ Manager to join our crew! You’ll play a key role in driving our ambition to build a best-in-class engineering culture—where quality, collaboration, and continuous improvement sit at the heart of everything we do. We’re looking for an experienced Test Manager to join our client's Loyalty team and help deliver seamless, high-quality digital experiences to millions of customers. You’ll lead the testing strategy and ensure the reliability of systems that integrate personalized offers and mission-based rewards into our customer journey. Working closely with developers, data scientists, and the core loyalty platform team, you’ll help create a modern digital ecosystem powered by data and built with cutting-edge technology.   This is an initial 6 month contract (outside IR35). You will be required on client site 3 days a week in Paddington, London.   What You’ll Do: Test Leadership...
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