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224 api developer jobs found

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Contract Spy
May 14, 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 07, 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
Apr 29, 2026
Hourly/Freelance
API Developer - AI Trainer at DataAnnotation, Remote, £Hourly Rate
Contract Spy Remote
Full job description 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...
Contract Spy
Apr 22, 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 13, 2026
Hourly/Freelance
Integration Developer (API Specialist) - AI Trainer at Mindrift, Remote, £Freelance Rate
Contract Spy Remote
Mindrift is looking for skilled  Integration Developers (API Specialists)  to join the Tendem project ( https://tendem.ai/ ) and build robust system 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 system integration expertise, structured thinking, and quality control to ensure reliable and scalable data connectivity across platforms. This part-time remote opportunity is ideal for professionals with hands-on experience in APIs, webhooks, and building multi-system data pipelines. 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. About the Role This is a freelance role for a Tendem project....
Contract Spy
May 20, 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
May 20, 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
May 06, 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...
Contract Spy
May 06, 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
e 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 and governed...
Contract Spy
Apr 28, 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...
Contract Spy
Apr 28, 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
Apr 27, 2026
Duration not stated
Python - Senior Developers - AI Training at Prolific, UK, £Contract Rate
Contract Spy London, England, United Kingdom
About Prolific Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We're looking for Senior Python Developers to join our Expert Network to help train and evaluate cutting-edge AI models. If you have a background in Software Engineering, we'll send you a quick 10- to 15-minute test to assess your skills. If successful, you'll be invited to join Prolific as a participant, where you'll get paid to help AI understand and summarize complex scientific data. Researchers looking for your skills tend to pay up to $50/hr, depending on skills and experience level . You must be prepared to complete paid tasks that require one hour of uninterrupted work , though many are shorter. What you'll bring Educational...
Contract Spy
May 20, 2026
Duration not stated
CRM Solutions Engineer at The Legal Director, Remote, £450-£600 per day
£450 - £600 per day
Contract Spy Remote
A Freelance CRM Solutions Engineer is needed to join The Legal Director, a scaling B2B legal services firm entering a critical stage of operational maturity. Working directly with the leadership team, this is a high impact project role focused on reviewing, redesigning and rebuilding the systems that underpin the commercial engine. This is not a standard CRM admin brief. It sits at the intersection of systems architecture, product thinking, operational design and hands on technical delivery. You will assess the current environment, untangle technical debt, and design a future state that is commercially practical, scalable and aligned to how the business actually works. The Legal Director provides fractional legal support to SMEs through a flexible model that combines a core team with a large network of freelance lawyers. As the business grows, the need for clarity across pipeline tracking, workflow management, reporting and integrations has become critical. Joining...
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 18, 2026
6 Months or more
Senior Backend .NET Engineer (AWS, Claude Code) at Reapit Ltd, Remote, 6 Months, £Excellent Day Rate (Outside IR35)
Contract Spy Remote (United Kingdom)
Outside IR35 contract - 6 months - excellent day rate - remote Reapit - Who are we? Reapit is the original end-to-end business technology provider for estate agencies of all sizes. We've been helping sales and lettings agents build relationships and grow their businesses for more than 25 years. Our technology empowers property professionals across Europe, the Middle East, Australia, and New Zealand to work with buyers, sellers, tenants, and landlords to deliver a dream home experience. Worldwide, over 100,000 agents across more than 15,000 branches use Reapit to run their businesses, manage properties, collect rent, engage clients, and provide outstanding customer service every time. What you'll be doing Reporting to the Director of Engineering, you'll operate as a highly senior, technically hands-on Back End engineer, Embedded into a squad and owning delivery of substantive, cloud-native services end-to-end. Ad-hoc client interaction, supporting...
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 15, 2026
Duration not stated
Senior Front End Developer at Bridebook, Remote, £Competitive Day Rate
Contract Spy Remote
Senior Front-End React Developer At Bridebook, we're digitising the wedding industry! Join us in transforming the wedding planning experience for engaged couples around the world. Full-time Contractor · Remote · Competitive Day Rate Who is Bridebook anyway? Bridebook is a revolutionary wedding planning platform that seeks to make wedding planning an enjoyable, intuitive, and rewarding experience for couples, guests, and industry partners. Launched in the UK, Bridebook has over 1,000,000 planning couples and has been featured in major outlets such as the New York Times, the BBC, and the App Store. After seven years and many iterations later, we have 2 in 3 engaged UK couples and 1 in 3 engaged German couples using Bridebook, and have recently expanded into the French and Irish markets. While we serve a very emotional and creative industry, we are disrupting the wedding industry by leveraging cutting-edge technology to provide seamless and...
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
Duration not stated
ServiceNow Developer — ITSM/Integrations at XAAS Solutions, Remote, £500-£560 per day
£500 - £560 per day
Contract Spy Remote
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, developing,...
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