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21 api developer jobs found

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up to 6 Months api developer
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Contract Spy
Dec 11, 2025
up to 6 Months
.Net Software Engineer (x3) at Ampa - Legal & Professional Services, England, 3 Months initial, £Contract Rate
Contract Spy England, United Kingdom
Ampa are looking to add three Software (Bespoke) Developers to our Applications & Development division on an initial 3-month contract basis.   This role is to support the delivery and implementation of a new Azure-hosted technical solution that will transform how our internal debt recovery team operates in line with our product roadmap. What you will be doing: Create, implement, and support reliable data integrations between our new debt solution, third parties, clients and internal systems Ensure seamless data exchange, that automates vital business processes, supports regulatory requirements, and creates new possibilities for insightful reporting and process improvement. This role is critical in making the most of the debt solution by ensuring it works as part of a unified digital environment, driving efficiency and organisational growth Role Priorities Understand the new solution, architecture design, project purpose and...
Contract Spy
Dec 08, 2025
up to 6 Months
Mobile App Developer at FinnPowa, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Job Summary We are seeking a skilled Application Developer to join our dynamic team. The ideal candidate will be responsible for designing, developing, and maintaining applications across various platforms, including Android, iOS and/or Flutter. This role requires a strong understanding of application development principles and the ability to work collaboratively within a team environment. The successful applicant will demonstrate proficiency in multiple programming languages and frameworks, ensuring high-quality user experiences. Duties Design and develop mobile applications for Android and iOS platforms using languages such as Java, Kotlin, Swift, and Objective-C. Create UX/UI page which are intuitive and visually appealing interfaces that enhance user experience. Implement RESTful APIs to facilitate communication between applications and back-end services e.g. for authentication, transactions, payment transfer, etc Conduct thorough testing of...
Contract Spy
Dec 31, 2025
up to 6 Months
Senior Systems Integration Test Analyst at Ten10, London/Remote, 3 Months initial, £375 per day
£375 per day
Contract Spy Hybrid (London, UK)
Senior Systems Integration Test Analyst Rate: £375pd (Inside IR35) Duration: 3 months initially Location: London (Hybrid, 3 days per week onsite)   Are you a highly experienced Senior Systems Integration Test Analyst with a proven track record in end-to-end technical systems validation? At Ten10, we’re a leading consultancy in Quality Engineering, Software Testing, and DevOps, and we’re looking for someone like you to join us on an interim basis for a challenging and impactful project.   The Role: Specialist in Back-End Systems Integration You will play a crucial role in ensuring that our client’s integrated back-end systems meet the highest standards of quality. This role is highly focused on the technical depth of systems integration and requires a proactive, inquisitive approach to testing in a dynamic environment.   We need a candidate who is naturally inquisitive, is comfortable asking...
Contract Spy
Dec 31, 2025
up to 6 Months
Power Platform Developer at Sword Group, United Kingdom, 3 Months, £Contract Rate
Contract Spy Remote
Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving real transformation change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals. Power Platform Developer – 3-Month Contract (UK-Based, Starting January 2026)   We are seeking experienced Power Platform Developers to join our team on a short-term contract to accelerate delivery of a Renewables Project Portal (RPP) Ecosystem —a suite of interconnected, enterprise-scale Power Platform solutions supporting a renewable energy initiatives.   We are looking for specialists to focus on different areas of the product backlog:   Dataverse Developer –...
Contract Spy
Dec 30, 2025
up to 6 Months
Power Platform Developer at Sword Group, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving real transformation change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals. Power Platform Developer – 3-Month Contract (UK-Based, Starting January 2026)   We are seeking experienced Power Platform Developers to join our team on a short-term contract to accelerate delivery of a Renewables Project Portal (RPP) Ecosystem —a suite of interconnected, enterprise-scale Power Platform solutions supporting a renewable energy initiatives.   We are looking for specialists to focus on different areas of the product backlog:   Dataverse Developer –...
Contract Spy
Dec 24, 2025
up to 6 Months
Senior Systems Integration Test Analyst at Ten10, London/Remote, 3 Months initial, £375 per day
£375 per day
Contract Spy Remote (London Area, United Kingdom)
Senior Systems Integration Test Analyst Rate: £375pd (Inside IR35) Duration: 3 months initially Location: London (Hybrid, 3 days per week onsite)     Are you a highly experienced Senior Systems Integration Test Analyst with a proven track record in end-to-end technical systems validation? At Ten10, we’re a leading consultancy in Quality Engineering, Software Testing, and DevOps, and we’re looking for someone like you to join us on an interim basis for a challenging and impactful project.     The Role: Specialist in Back-End Systems Integration You will play a crucial role in ensuring that our client’s integrated back-end systems meet the highest standards of quality. This role is highly focused on the technical depth of systems integration and requires a proactive, inquisitive approach to testing in a dynamic environment.     We need a candidate who is naturally inquisitive,...
Contract Spy
Dec 22, 2025
up to 6 Months
Senior AI Architect at KPMG, London/Remote, 3 Months, £Contract Rate
Contract Spy Hybrid (London, UK)
Role Overview: Leads the design, development, and deployment of intelligent, scalable AI applications leveraging LLMs, advanced RAG, and agentic AI frameworks. This role requires a strong blend of data science acumen, AI product design, and cloud-native full-stack architecture expertise, particularly within the Azure ecosystem.    The ideal candidate will have proven experience delivering production-grade AI systems, leading multidisciplinary teams, and shaping the AI strategy within enterprise environments.    Key Responsibilities:   Architect and develop intelligent applications using state-of-the-art LLMs (e.g., Gemini, OpenAI, Mistral) for tasks such as summarization, generation, Q&A, and reasoning Lead the integration of agentic AI frameworks (e.g., LangGraph, CrewAI, AutoGen) to build autonomous or semi-autonomous systems for complex workflows  Define and enforce scalable patterns for deploying AI/ML...
Contract Spy
Dec 22, 2025
up to 6 Months
Senior Systems Integration Test Analyst at Ten10, London/Remote, 3 Months initial, £375 per day
£375 per day
Contract Spy Hybrid (London, UK)
Senior Systems Integration Test Analyst Rate: £375pd (Inside IR35) Duration: 3 months initially Location: London (Hybrid, 3 days per week onsite)   Are you a highly experienced Senior Systems Integration Test Analyst with a proven track record in end-to-end technical systems validation? At Ten10, we’re a leading consultancy in Quality Engineering, Software Testing, and DevOps, and we’re looking for someone like you to join us on an interim basis for a challenging and impactful project.   The Role: Specialist in Back-End Systems Integration You will play a crucial role in ensuring that our client’s integrated back-end systems meet the highest standards of quality. This role is highly focused on the technical depth of systems integration and requires a proactive, inquisitive approach to testing in a dynamic environment.   We need a candidate who is naturally inquisitive, is comfortable asking...
Contract Spy
Dec 22, 2025
up to 6 Months
Power Platform Developer at Sword Group, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving real transformation change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals. Power Platform Developer – 3-Month Contract (UK-Based, Starting January 2026)   We are seeking experienced Power Platform Developers to join our team on a short-term contract to accelerate delivery of a Renewables Project Portal (RPP) Ecosystem —a suite of interconnected, enterprise-scale Power Platform solutions supporting a renewable energy initiatives.   We are looking for specialists to focus on different areas of the product backlog:   Dataverse Developer –...
Contract Spy
Dec 19, 2025
up to 6 Months
Data Scientist at Cabinet Office, UK Wide, 2 months, £Contract Rate
Contract Spy United Kingdom
On behalf of the Cabinet Office, we are looking for a Data Scientist (Inside IR35)  for a 2 month contract based REMOTELY .   Note:  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, (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   The Applied Data & Insight team (ADI) within the Cabinet Office sit at the centre of the Government Communications profession and are formed from a group of multidisciplinary experts from backgrounds in Digital, Data Science, Software Development, Insight & Evaluation, Behavioural Science and Communications working closely together to deliver effective data-driven solutions across government. We are looking for a Data Scientist to join ADI. The role...
Contract Spy
Dec 19, 2025
up to 6 Months
Senior User Researcher - Active SC at Cabinet Office, Remote, 2 Months, £Contract Rate
Contract Spy Remote (United Kingdom)
Note: 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, (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   The Applied Data & Insight team (ADI) within the Cabinet Office sit at the centre of the Government Communications profession and are formed from a group of multidisciplinary experts from backgrounds in Digital, Data Science, Software Development, Insight & Evaluation, Behavioural Science and Communications working closely together to deliver effective data-driven solutions across government.   We are looking for a Senior User Researcher to join our team to help develop and deliver a new round of actionable insight from our 6500 users across 240 organisations. The role holder will work...
Contract Spy
Dec 15, 2025
up to 6 Months
Senior Systems Integration Test Analyst at Ten10, London/Remote, 3 Months initial, £375 per day
£375 per day
Contract Spy Hybrid (London, UK)
Senior Systems Integration Test Analyst Rate: £375pd (Inside IR35) Duration: 3 months initially Location: London (Hybrid, 3 days per week onsite)   Are you a highly experienced Senior Systems Integration Test Analyst with a proven track record in end-to-end technical systems validation? At Ten10, we’re a leading consultancy in Quality Engineering, Software Testing, and DevOps, and we’re looking for someone like you to join us on an interim basis for a challenging and impactful project.   The Role: Specialist in Back-End Systems Integration You will play a crucial role in ensuring that our client’s integrated back-end systems meet the highest standards of quality. This role is highly focused on the technical depth of systems integration and requires a proactive, inquisitive approach to testing in a dynamic environment.   We need a candidate who is naturally inquisitive, is comfortable asking...
Contract Spy
Dec 15, 2025
up to 6 Months
Power Platform Developer at Sword Group, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving real transformation change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals. Power Platform Developer – 3-Month Contract (UK-Based, Starting January 2026)   We are seeking experienced Power Platform Developers to join our team on a short-term contract to accelerate delivery of a Renewables Project Portal (RPP) Ecosystem —a suite of interconnected, enterprise-scale Power Platform solutions supporting a renewable energy initiatives.   We are looking for specialists to focus on different areas of the product backlog:   Dataverse Developer –...
Contract Spy
Dec 12, 2025
up to 6 Months
Software Engineer, Device Integrations at Automata, London, 4 Months+, £Contract Rate
Contract Spy London, England, United Kingdom
Staff Software Engineer – Robotics & Life Sciences Automation Location: London, UK - Hybrid (3 days/week on site) Contract: 4 months with possibility of extension Start: ASAP (Dec 2025 / Jan 2026) Automata: accelerating breakthroughs that save lives Automata builds automation that accelerates life sciences: enabling faster drug discovery, next-generation personalised medicines, and high-precision diagnostics where turnaround time can mean the difference between life and death. We believe the future of biology depends on automation that is reliable, scalable and accessible — and we’re building the platform that makes that possible. Our modular lab bench and digital automation platform already run mission-critical workflows in leading research organisations. The next evolution of our product will scale globally, unify robotics with reproducible software interfaces, and redefine how scientists interact with instruments. And we’re building...
Contract Spy
Dec 11, 2025
up to 6 Months
Power Platform Developer at Sword Group, United Kingdom, 3 Months, £Contract Rate
Contract Spy United Kingdom
Sword is a leading provider of business technology solutions within the Energy, Public and Finance Sectors, driving real transformation change within our clients. We use proven technology, specialist teams and domain expertise to build solid technical foundations across platforms, data and business applications. We have a passion for using technology to solve business problems, working in partnership with our clients to help in achieving their goals. Power Platform Developer - 3-Month Contract (UK-Based, Starting January 2026)   We are seeking experienced Power Platform Developers to join our team on a short-term contract to accelerate delivery of a Renewables Project Portal (RPP) Ecosystem -a suite of interconnected, enterprise-scale Power Platform solutions supporting a renewable energy initiatives.   We are looking for specialists to focus on different areas of the product backlog:   Dataverse Developer - Expertise in complex security...
Contract Spy
Dec 11, 2025
up to 6 Months
Frontend WordPress Developer at Digital Mosaic, Remote, 3 Months, £Contract Rate
Contract Spy Remote
Contract length: 3 months This role to open to anyone residing within the UK or European Union. Job Summary: We are seeking a skilled and experienced Frontend WordPress Developer to join our team. As a WordPress Developer, you will be responsible for designing and implementing attractive and functional websites for our clients. You will work closely with our design team to ensure seamless integration of design and functionality. Duties: - Develop and maintain WordPress websites using best practices - Collaborate with the design team to implement website designs - Customize WordPress themes and plugins to meet client requirements - Optimize website performance and ensure compatibility across different browsers and devices - Conduct website testing and troubleshooting - Collaborate with cross-functional teams to integrate third-party APIs and services - Stay up-to-date with industry trends and advancements in web development Qualifications: - Proven experience as...
Contract Spy
Dec 10, 2025
up to 6 Months
Senior Applications Developer at Essex County Council, Chelmsford, 3 Months, to £500 per day
Contract Spy Chelmsford, England, United Kingdom
About The Role Senior Applications Developer Contract: March 2026 Working Hours : Full-Time Salary : £384.14 PAYE / £500.00 Umbrella, daily rate Closing Date : Monday 22nd December 2025 About The Role Essex County Council is ambitious and by 2030 it will be one of the most forward looking, effective and financially sustainable Councils in the country. ECC will be a leading-edge digital council that drives excellent customer service with transformation at the heart of service excellence. The Product and Delivery team will provide product leadership and direction for essex.gov.uk. They will develop a bold product vision, translating this into a roadmap of prioritised deliverables, planning and managing the different phases of the product delivery lifecycle, iterating a product over time to meet user needs, and ensuring products are built effectively, on time and to budget, setting high standards to ensure products meet user needs. The team...
Contract Spy
Dec 10, 2025
up to 6 Months
Senior Project Manager at Homes England, Remote/London, 3 Months, £Contract Rate
Contract Spy Remote (London, UK)
Homes England, the government's housing and regeneration agency, plays a central role in tackling the housing challenges the country now faces. We have the appetite, influence, expertise, and resource to drive positive market change, and our mission is to ensure more homes are built in areas of greatest need, improve affordability and create a sustainable housing market.   Following the publication of the government's Levelling Up White Paper, Homes England has also been tasked with a core role in spearheading regeneration, partnering with places to reduce economic disparity, empower local leaders and create equal opportunities across the country to ensure communities reach their full potential.   As a Senior Project Manager , your main responsibilities will be to: Create and lead the project to deliver the agreed outcomes within time, cost, and quality constraints Day-to-day management and leadership of the project and the project team. Providing...
Contract Spy
Dec 09, 2025
up to 6 Months
Web Experience Designer & Payload Developer at Crypto.com, London, 3 Months, £Contract Rate
Contract Spy London, England, United Kingdom
As a Web Experience Designer & Payload Developer, you will play a key role in shaping and building the next generation of our content-driven web experiences. You will be responsible for designing reusable templates, implementing them within Payload CMS, and creating modular components and widgets that allow our teams to scale content production efficiently. This hybrid role combines design sensibility with hands-on front-end development and CMS integration, ensuring our digital properties are both visually engaging and technically robust.     Responsibilities Design and deliver reusable page templates (e.g., product landing pages) that are brand-consistent and scalable Create designs in Figma for review Build and configure these templates in Payload CMS, ensuring editors can easily manage and repurpose them Develop and implement reusable widgets/components (e.g., author profile cards, live pricing blocks, rich content sections)...
Contract Spy
Dec 08, 2025
up to 6 Months
Principal React Native Engineer at hedgehog lab, Remote/Edinburgh, 3 Months, £Contract Rate
Contract Spy Remote (Edinburgh, UK)
Job title : Principal React Native Engineer Contract type : Full-time, contract Location : Remote first with the ability to travel to Edinburgh for key sessions Contract length: 3 months (January 5th start) We're putting together a new squad to deliver the rebuild of a long-standing B2B mobile product used by enterprise customers worldwide. The project is fully approved, well-defined and ready to start. We’re looking for a Principal React Native Engineer who can pair exceptional hands-on engineering with strong leadership. You’ll help guide teams, support delivery planning and work closely with key stakeholders. This role sits above three delivery squads and will be central to maintaining engineering quality, interpreting requirements and driving overall development velocity. It’s an excellent fit for someone with a deep background in building production-grade React Native applications, experience leading teams or technical workstreams and a...
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