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60 api developer jobs found in London

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London United Kingdom api developer
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Contract Spy
Jun 09, 2026
Duration not stated
AI Security Engineer at Orbital, London, £Contract Rate
Contract Spy London, UK
We’re on a mission to make real estate transactions smarter, faster, and friction-free.   Real estate is the world’s largest asset class , yet the legal processes and tools behind it remain slow, manual, and underinvested. Lawyers must review dense documents line by line and piece together information across silos, all while clients demand faster, more transparent due diligence.   That's where we come in. Orbital Copilot is the AI assistant built exclusively for commercial real estate law. Developed with former practicing real estate lawyers, it accelerates complex due diligence by up to 70% while delivering legal-grade precision.   We’ve just raised a $60m Series B to accelerate our UK/US expansion.   We're trusted by leading firms like Goodwin and BCLP to remove the busywork so legal teams can focus on what they do best: applying sharp legal judgment, delivering standout client service, and getting...
Contract Spy
Jun 05, 2026
Duration not stated
Senior/Lead Java Developer at Synechron, London, £Contract Rate
Contract Spy London, UK
Senior/Lead Java Developer 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. We are seeking a highly skilled and experienced Senior/Lead Java Developer with 10+ years of hands-on experience in enterprise application development. The ideal candidate must possess strong expertise in core Java fundamentals, concurrency, and distributed systems , along with exposure to AI/ML-driven solutions . This role demands a deep understanding of data structures, system design, performance optimization, and scalable architecture , along with the ability to lead technical initiatives and mentor teams. This role is Inside IR35 contract Job Locatio n: London (Hybrid - 3 days in the offi ce) Key Responsibilities: Design, develop, and...
Contract Spy
May 28, 2026
up to 6 Months
FastAPI Engineer - Python at Photoroom, London, 3-6 Months, £Contract Rate
Contract Spy London, UK
About us Founded in 2019 and part of Y Combinator's 2020 cohort, Photoroom is the leading visual solution for e-commerce. We've raised Series B funding and reached 300+ million users worldwide, processing over 5 billion images annually and serving both small businesses and major enterprises like Amazon, DoorDash, and Decathlon through our mobile app, web platform, and API. We're a remote-friendly team of 100+ passionate builders giving e-commerce businesses superpowers to create visuals that help them grow, making the hardest parts of selling online disappear. We focus on craft, innovation, and collaboration, creating exceptional impact for e-commerce businesses worldwide. Python Engineer – Public API (Contract) Day rate: Negotiable Duration: 6 months Location: Remote. We can hire people already based in selected countries only: France, Germany, Ireland, Italy, Portugal, Spain, UK   About the Role You will design,...
Contract Spy
May 28, 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
May 27, 2026
up to 6 Months
Software Developer in Test - SC Cleared at TEN10 SOLUTIONS LIMITED, London/Remote, 3 Months initial, £Contract Rate
Contract Spy Hybrid (Southwark, London SE1 3SS, UK)
Contract Opportunity: Security Cleared Software Developer in Test Job Type: Contract -3 month initial - Inside IR35 Location: Hybrid - London Start Date: ASAP Are you an experienced Security Cleared Software Developer in Test looking for your next contract opportunity? We’re seeking a highly capable SDET to support a major public sector programme, helping deliver secure, high-quality software solutions within a complex Agile environment. This is an exciting opportunity to work on large-scale digital transformation initiatives, contributing to the design and implementation of robust automated testing frameworks using Java and Selenium . ?? Important: Candidates must hold active Security Clearance Existing NPPV3 clearance would be highly advantageous. The Role As a Security Cleared Software Developer in Test , you will play a key role in ensuring software quality across critical public sector systems and services. Working closely...
Contract Spy
May 20, 2026
Duration not stated
ServiceNow Developer — ITSM / Integrations at XAAS Solutions LLC, London, £500 - £560 a day
£500 - £560 per day
Contract Spy 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
May 20, 2026
up to 6 Months
FastAPI Engineer - Python at Photoroom, London, 3-6 Months, £Contract Rate
Contract Spy London, UK
About us Founded in 2019 and part of Y Combinator's 2020 cohort, Photoroom is the leading visual solution for e-commerce. We've raised Series B funding and reached 300+ million users worldwide, processing over 5 billion images annually and serving both small businesses and major enterprises like Amazon, DoorDash, and Decathlon through our mobile app, web platform, and API. We're a remote-friendly team of 100+ passionate builders giving e-commerce businesses superpowers to create visuals that help them grow, making the hardest parts of selling online disappear. We focus on craft, innovation, and collaboration, creating exceptional impact for e-commerce businesses worldwide. Python Engineer – Public API (Contract) Day rate: Negotiable Duration: 6 months Location: Remote. We can hire people already based in selected countries only: France, Germany, Ireland, Italy, Portugal, Spain, UK   About the Role You will design,...
Contract Spy
May 15, 2026
6 Months or more
Salesforce Technical Architect at Handelsbanken, London, 12 Months, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities The Technical Architect (Salesforce) is accountable for the end-to-end technical integrity of the Salesforce platform across Financial Services Cloud (FSC), OmniStudio, and Experience Cloud. Working closely with the other architects, the role sets and enforces the technical direction for delivery teams — governing solution design, development standards, platform security, and DevOps practices. The role serves as the primary technical authority within the delivery organisation: making high-consequence design decisions, resolving complex platform challenges, and ensuring that custom development and integrations are fit for purpose in a regulated banking environment. Equally, the Technical Architect is a people leader — mentoring developers, setting the standard for engineering craft, and building a culture of quality, accountability, and continuous improvement across the team. Key Responsibilities Technical Solution Design...
Contract Spy
May 14, 2026
6 Months or more
ESRI Dashboard Developer at Valcon Group UK, Remote/London, 6 Months, £Contract Rate
Contract Spy Remote (London, UK)
Role Overview We are seeking a skilled and motivated ESRI Dashboard Developer to join our GIS team. You will be responsible for designing, developing, and maintaining interactive spatial dashboards and web applications using the ESRI ArcGIS platform. Working closely with stakeholders across the organisation, you will translate complex datasets into clear, compelling visualisations that support data-driven decision-making. Key Responsibilities Dashboard Development Design and build dynamic, interactive dashboards using ArcGIS Dashboards (Operations Dashboard) Develop and maintain ArcGIS Experience Builder and ArcGIS StoryMaps applications Create and configure ArcGIS Web AppBuilder applications with custom widgets Integrate Real Time data feeds and live layers into operational dashboards Prepare, process, and publish spatial and tabular datasets to ArcGIS Online and ArcGIS Enterprise Build and maintain feature layers, hosted feature services, and map...
Contract Spy
May 13, 2026
up to 6 Months
FastAPI Engineer - Python at Photoroom, London, 3-6 Months, £Contract Rate
Contract Spy London, UK
About us Founded in 2019 and part of Y Combinator's 2020 cohort, Photoroom is the leading visual solution for e-commerce. We've raised Series B funding and reached 300+ million users worldwide, processing over 5 billion images annually and serving both small businesses and major enterprises like Amazon, DoorDash, and Decathlon through our mobile app, web platform, and API. We're a remote-friendly team of 100+ passionate builders giving e-commerce businesses superpowers to create visuals that help them grow, making the hardest parts of selling online disappear. We focus on craft, innovation, and collaboration, creating exceptional impact for e-commerce businesses worldwide. Python Engineer – Public API (Contract) Day rate: Negotiable Duration: 6 months Location: Remote. We can hire people already based in selected countries only: France, Germany, Ireland, Italy, Portugal, Spain, UK   About the Role You will design, build, and...
Contract Spy
Jun 03, 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
May 27, 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
May 19, 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
May 12, 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
Jun 10, 2026
6 Months or more
Senior AI Engineer at Tokio Marine HCC, London, 6 Months, £Contract Rate (Outside IR35)
Contract Spy London, UK
Senior AI Engineer Assignment type: 6 month contract (outside IR35) TMHCC is seeking a Senior AI Engineer to support the build-out of our AI Ops capability and delivery of strategic AI transformation initiatives across insurance operations, including Policy Revamp and FNOL (First Notice of Loss). The role will focus on designing and implementing enterprise-grade Agentic AI solutions using Azure AI Foundry, Python, Azure Functions, and modern cloud-native engineering practices. This is a hands-on engineering role requiring strong experience in AI workflow orchestration, secure Azure architecture, API integration, and scalable AI solution delivery.   Key Responsibilities Design and develop Agentic AI solutions using Azure AI Foundry and Azure OpenAI Build AI orchestration workflows using Python and Azure Durable Functions Develop document-processing and AI-driven automation solutions for insurance workflows Implement secure Azure...
Contract Spy
Jun 10, 2026
Duration not stated
Senior Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
  Job Title: Senior Full Stack Developer (contract) Location: London Hybrid. Travel to the London office 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for Senior Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...
Contract Spy
Jun 10, 2026
Duration not stated
Full Stack Developer at Deloitte, London, £Contract Rate
Contract Spy London, UK
  Job Title: Full Stack Developer (contract) Location: London Hybrid. Travel to the London office on 3 days a week Duration: 11 months Contract Start Date: ASAP *note client onboarding takes 6 weeks from offer Day Rate: Competitive (Inside IR35)   Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte.   The Role We are looking for an experienced Full Stack Developers to work in the Technology and Transformation Team at Deloitte. You will work with one of our global financial services clients. This position...
Contract Spy
Jun 10, 2026
Duration not stated
Microsoft 365 & SharePoint Data Engineer at Thebes IT Solutions Ltd, London, £Contract Rate
Contract Spy London, UK
Role : Microsoft 365 & SharePoint Data Engineer Location: UK Type: Contract The Context: Thebes Group is an optimisation company specialising in AI-enabled transformation. We help organisations improve workflow, reporting, information management, and operational decision-making by combining process optimisation, knowledge architecture, semantic technologies, automation, and artificial intelligence. We are currently delivering an AI transformation programme for a private equity group, focused on enhancing group-level operations through intelligent workflows, improved information accessibility, executive reporting, and AI-driven operational intelligence. The Microsoft 365 and SharePoint environment is the operational backbone through which much of the group's information flows: documents, reporting, collaboration, and process. Getting that environment right, and connecting it properly to the AI and knowledge layers being built, is critical to the success of the...
Contract Spy
Jun 10, 2026
Duration not stated
Microsoft Dynamics 365 Developer, Power Pages at Scrumconnect, London, £450-£475 per day
£450 - £475 per day
Contract Spy London, UK
£450–£475 per day | Inside IR35 City London Province Greater London Country United Kingdom Postal Code EC1A Job Description About Scrumconnect Consulting   Scrumconnect Consulting is a UK national SME award-winning software development consultancy with over 300 consultants across the UK. We work with UK Public Sector clients to build impactful, award-winning digital services that improve millions of lives.   We take as much pride in our people, culture and work-life balance as we do in making services that improve millions of lives. Collaborative, entrepreneurial and dedicated to problem-solving, we bring the step change our customers need to sustain innovation.   About the Role   We are looking for an experienced Microsoft Dynamics 365 Developer to join a blended delivery team working on a large-scale public sector digital transformation...
Contract Spy
Jun 08, 2026
6 Months or more
Back-End Developer (Java &Spring Boot/GCP) at Methods, London, 6 Months, £490 per day
£490 per day
Contract Spy London Area, United Kingdom
Methods is looking for a Back End Developer specialising in Java Spring Boot and GCP(Google Cloud Platform) to join our team within the private Sector Business unit. Rate: £490 inside IR35 Duration: 6 month initially Location: Hybrid; 3days/w in London office   Requirements:   Architectural Rebuild: Play a role in migrating and rebuilding our core architecture in Java Spring Boot to align with a composable, cloud-native landscape. Connector Development: Design and optimize technical connectors for a diverse mix of global channels, including generalist marketplaces, social commerce (eg, TikTok Shop), and quick-commerce (eg, Glovo, Deliveroo). Catalog Publication Flow: Refocus efforts on rebuilding the catalog publication flow, addressing technical complexities such as category mapping, product variant synchronization, and asynchronous marketplace APIs. Business Logic Migration: Collaborate on transferring complex Legacy...
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