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16 api developer jobs found

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United Kingdom api developer up to £300
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Contract Spy
Mar 27, 2026
Duration not stated
System Administration Tooling at Omnis Intelligence Limited, United Kingdom, £250-£300 per day
£250 - £300 per day
Contract Spy United Kingdom
Introduction The organisation develops and operates a suite of digital platforms that support the management and analysis of operational data within the automotive sector. These platforms integrate information from multiple sources and provide tools that enable manufacturers, dealer groups, and operational teams to work with data effectively. As the platform continues to evolve, we are developing a set of internal system administration tools that allow authorised users to manage configuration, reference data, assets, and platform access in a structured and secure way. These tools form an important part of the platform infrastructure, enabling operational teams to maintain system configuration, manage users and permissions, and administer key platform data without requiring direct database access. Role Overview This role focuses on designing and developing internal system administration tooling that supports the operation and management of the organisation’s...
Contract Spy
Mar 10, 2026
Hourly/Freelance
Web Developer- AI Trainer at DataAnnotation, Remote, From £29.61 an hour
£200 - £240 per day
Contract Spy Remote (London, UK)
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  Web 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...
Contract Spy
Mar 30, 2026
Duration not stated
Senior Performance Tester (SC Cleared/SC Eligible) at Scrumconnect Consulting, London EC1A, £275-£300 per day (Outside IR35)
£275 - £300 per day
Contract Spy London EC1A, UK
275-300 Outside IR 35 City London Province Greater London Country United Kingdom Postal Code EC1A 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, and more to deliver innovative digital services that matter.   Role Overview We are looking for a Senior Performance Tester with Active SC to deliver hands-on load and performance testing across large-scale digital services and backend applications, with experience of working with cloud-based distributed services. This is a technical, delivery-focused role operating in structured and governed environments where performance, resilience, and...
Contract Spy
Mar 30, 2026
Duration not stated
SEO & AI Search Specialist - Digital Visibility & Content at Dukes Education, London, £150-£300 per day
£150 - £300 per day
Contract Spy London, UK
Company Overview Dukes Education Ltd is a family of schools and educators dedicated to providing children with the foundations for an extraordinary life through quality education. Our diverse community includes nurseries, prep schools, senior schools, 6th form colleges, international summer courses, summer camps, and university preparation consultancies. Job Overview We are seeking a experienced SEO and AI Search specialist with strong content experience to improve the digital visibility of a group of international schools and colleges. The role combines technical SEO, AI search optimisation, and content development across multiple school websites. A core objective of this role is to improve the quality, relevance, and discoverability of website content, ensuring it performs well in both traditional search engines and emerging AI-powered search systems. Candidates should have experience creating or directing high-performing SEO content and optimising...
Contract Spy
Mar 25, 2026
Duration not stated
Java Back-End Developer with Azure/AWS at ERP Tech Solutions Ltd, London, £300 per day (Outside IR35)
£300 per day
Contract Spy London, UK
Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've...
Contract Spy
Mar 23, 2026
Duration not stated
SEO & AI Search Specialist - Digital Visibility & Content at Dukes Education, London, £150-£300 per day
£150 - £300 per day
Contract Spy London, UK
Company Overview Dukes Education Ltd is a family of schools and educators dedicated to providing children with the foundations for an extraordinary life through quality education. Our diverse community includes nurseries, prep schools, senior schools, 6th form colleges, international summer courses, summer camps, and university preparation consultancies. Job Overview We are seeking a experienced SEO and AI Search specialist with strong content experience to improve the digital visibility of a group of international schools and colleges. The role combines technical SEO, AI search optimisation, and content development across multiple school websites. A core objective of this role is to improve the quality, relevance, and discoverability of website content, ensuring it performs well in both traditional search engines and emerging AI-powered search systems. Candidates should have experience creating or directing high-performing SEO content and optimising websites...
Contract Spy
Mar 23, 2026
Duration not stated
Senior Performance Tester (SC Cleared/SC Eligible) at Scrumconnect Consulting, London EC1A, £275-£300 per day (Outside IR35)
£275 - £300 per day
Contract Spy London EC1A, UK
275-300 Outside IR 35 City London Province Greater London Country United Kingdom Postal Code EC1A 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, and more to deliver innovative digital services that matter.   Role Overview We are looking for a Senior Performance Tester with Active SC to deliver hands-on load and performance testing across large-scale digital services and backend applications, with experience of working with cloud-based distributed services. This is a technical, delivery-focused role operating in structured and governed environments where performance, resilience, and...
Contract Spy
Mar 18, 2026
Duration not stated
Java Back-End Developer with Azure/AWS at ERP Tech Solutions Ltd, London, £300 per day (Outside IR35)
£300 per day
Contract Spy London, UK
Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've written...
Contract Spy
Mar 16, 2026
Duration not stated
Senior Performance Tester (SC Cleared/SC Eligible) at Scrumconnect Consulting, London EC1A, £275-£300 per day (Outside IR35)
£275 - £300 per day
Contract Spy London EC1A, UK
275-300 Outside IR 35 City London Province Greater London Country United Kingdom Postal Code EC1A 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, and more to deliver innovative digital services that matter.   Role Overview We are looking for a Senior Performance Tester with Active SC to deliver hands-on load and performance testing across large-scale digital services and backend applications, with experience of working with cloud-based distributed services. This is a technical, delivery-focused role operating in structured and governed environments where performance, resilience, and...
Contract Spy
Mar 13, 2026
Duration not stated
Senior Software Developer at The Cosec House, United Kingdom, £250 a day
£250 per day
Contract Spy United Kingdom
At The Cosec House, we provide expert company secretarial services to businesses across the UK. Our mission is to simplify corporate governance through smart automation and user-friendly software that saves our clients time and ensures full compliance. We are seeking an experienced Senior Software Developer to join our growing team. You’ll play a key role in the continued development of our Laravel-based platform, which automates and streamlines company secretarial workflows. A major focus of this role is the modernisation of functionality from a legacy system. You’ll be responsible not just for building features, but for understanding existing processes and code, reviewing how they operate today, planning the work required to recreate and improve them on the new platform, and then delivering those improvements end-to-end. This is a hands-on role with a strong emphasis on technical ownership, planning, and structured delivery. You’ll help shape how work is broken down into...
Contract Spy
Mar 11, 2026
Duration not stated
Java Back-end Developer with Azure/AWS at ERP Tech Solutions Ltd, London, £300 per day Outside IR35
£300 per day
Contract Spy London, UK
Job Summary We are seeking an experienced Java Back-end Developer specialised in cloud platforms such as Azure and AWS to join our dynamic development team. The successful candidate will be responsible for designing, developing, and maintaining scalable back-end services and APIs, ensuring seamless integration with front-end applications and third-party systems. This role offers an exciting opportunity to work on innovative projects within a collaborative environment, contributing to the realisation of cutting-edge solutions that meet business needs. Responsibilities Liaise with fellow developers Designing and implementing microservices which use the spring boot framework. Working in compliance with the full Software Development Life Cycle. Connecting microservices to interact with databases. Understanding of how streaming technologies work such as Kafka. Build Azure/AWS pipelines Identifying and finding solutions to bugs. Ensure you've written...
Contract Spy
Mar 09, 2026
Duration not stated
Implementation Specialist – E-Invoicing at Stackstudio Digital Ltd., Multiple Locations, £300-£350 per day
£300 - £350 per day
Contract Spy United Kingdom
Job Title: Implementation Specialist E-Invoicing Location: London- 1 day Job Type: 6 months- Inside IR35 Role overview Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients.This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service. Note: Prior experience with e-invoicing platforms is not required. Comprehensive training on the platform will be provided prior to...
Contract Spy
Mar 09, 2026
Duration not stated
Implementation Specialist – E-Invoicing at Stackstudio Digital Ltd., Brighton, £300-£350 per day
£300 - £350 per day
Contract Spy Brighton, Brighton and Hove, UK
Job Title: Implementation Specialist E-Invoicing Location: London- 1 day Job Type: 6 months- Inside IR35 Role overview Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients.This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service. Note: Prior experience with e-invoicing platforms is not required. Comprehensive training on the platform will be provided prior to...
Contract Spy
Mar 09, 2026
Duration not stated
Implementation Specialist – E-Invoicing at Stackstudio Digital Ltd., Manchester, £300-£350 per day
£300 - £350 per day
Contract Spy Manchester, UK
Job Title: Implementation Specialist E-Invoicing Location: London- 1 day Job Type: 6 months- Inside IR35 Role overview Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients.This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service. Note: Prior experience with e-invoicing platforms is not required. Comprehensive training on the platform will be provided prior to...
Contract Spy
Mar 09, 2026
Duration not stated
Implementation Specialist – E-Invoicing at Stackstudio Digital Ltd., Birmingham, £300-£350 per day
£300 - £350 per day
Contract Spy Birmingham, UK
Job Title: Implementation Specialist E-Invoicing Location: London- 1 day Job Type: 6 months- Inside IR35 Role overview Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients.This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service. Note: Prior experience with e-invoicing platforms is not required. Comprehensive training on the platform will be provided prior to...
Contract Spy
Mar 09, 2026
Duration not stated
Implementation Specialist – E-Invoicing at Stackstudio Digital Ltd., Leicester, £300-£350 per day
£300 - £350 per day
Contract Spy Leicester, UK
Job Title: Implementation Specialist E-Invoicing Location: London- 1 day Job Type: 6 months- Inside IR35 Role overview Are you looking for a role that will use your problem-solving skills, technical interests, and client communication skills to their full potential? We are seeking Implementation Specialists to join our e-invoicing Professional Services team and lead the technical implementation of our e-invoicing platform with global clients.This is the perfect role for a well-organised, collaborative, and analytical person who wants to grow their career within the software implementation space and work with a varied portfolio of multinational clients. You'll use your technical aptitude, excellent communication skills, and problem-solving abilities to tackle client configuration challenges and ensure the highest level of service. Note: Prior experience with e-invoicing platforms is not required. Comprehensive training on the platform will be provided prior to...
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