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13 Contract API jobs in Saunderton Lee + 20 miles
Senior Full Stack Developer (TypeScript / Vue.js / C# / .NET) Fully Remote (UK-based) Contract Outside IR35 - Long-Term Contract - Competitive Day Rate - Were working with a well-established organisation undergoing a major platform transformation programme, and theyre looking to add an experienced Full Stack Developer to the team. This role will suit someone who enjoys owning features end-to-end, with strong frontend expertise while remaining comfortable working across APIs, databases, and backend services in a modern environment. What Youll Be Doing * Developing and enhancing customer-facing platforms and transactional systems * Building modern applications using Vue.js and TypeScript * Working closely with product, QA, and engineering teams to deliver new features * Investigating and resolving production issues across frontend, APIs, and databases
Senior Full Stack Developer (TypeScript / Vue.js / C# / .NET) Fully Remote (UK-based) Contract Outside IR35 - Long-Term Contract - Competitive Day Rate - Were working with a well-established organisation undergoing a major platform transformation programme, and theyre looking to add an experienced Full Stack Developer to the team. This role will suit someone who enjoys owning features end-to-end, with strong frontend expertise while remaining comfortable working across APIs, databases, and backend services in a modern environment. What Youll Be Doing * Developing and enhancing customer-facing platforms and transactional systems * Building modern applications using Vue.js and TypeScript * Working closely with product, QA, and engineering teams to deliver new features * Investigating and resolving production issues across frontend, APIs, and databases
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QA Engineer Automation
QA Engineer Automation
Halian Technology Limited
Maidenhead Thicket, Maidenhead (SL6)
Up to £400 per day
API testing and backend validation
API testing and backend validation
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Oracle Technical Change Consultant - Financial Systems
Oracle Technical Change Consultant - Financial Systems
Cadence Resourcing Limited
Reading (RG1)
£550 - £600 per day + Outside IR35
The contract requires a solid understanding of database schema and API structures for core financial modules: General Ledger (GL), Accounts Payable (AP), Accounts Receivable (AR), Fixed Assets (FA), and Cash Management (CE).
The contract requires a solid understanding of database schema and API structures for core financial modules: General Ledger (GL), Accounts Payable (AP), Accounts Receivable (AR), Fixed Assets (FA), and Cash Management (CE).
FEATURED
ASP.NET Web API * API-driven backend development
ASP.NET Web API * API-driven backend development
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Experience defining API standards, service boundaries and architectural governance.
Experience defining API standards, service boundaries and architectural governance.
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Full Stack .NET Web Developer
Full Stack .NET Web Developer
Association For Project Management
Saunderton Lee, Princes Risborough (HP27), HP27 9LE
From £50,000 to £55,000 per annum
Salary: £50,000- £55,000 per annum (depending on experience) 12-month Fixed Term Contract (Full time - 35 hours per week) Hybrid Working Home Based/Princes Risborough - Were Association for Project Management (APM). Were a professional membership organisation that sets the standards for the project profession. As a registered charity, we reinvest our surplus for the benefit of our members and the profession. We deliver education and develop qualifications. We conduct research and provide knowledge and resources. We run events and share best practice. We give people the opportunity to connect and provide community for our individual members and corporate partners, wherever they are. Above all, when doing so makes a difference, we challenge the status quo - Job Role Overview - An exciting opportunity has arisen for a Full Stack .NET Web Developer to join our Digital team on a fixed term ...
Salary: £50,000- £55,000 per annum (depending on experience) 12-month Fixed Term Contract (Full time - 35 hours per week) Hybrid Working Home Based/Princes Risborough - Were Association for Project Management (APM). Were a professional membership organisation that sets the standards for the project profession. As a registered charity, we reinvest our surplus for the benefit of our members and the profession. We deliver education and develop qualifications. We conduct research and provide knowledge and resources. We run events and share best practice. We give people the opportunity to connect and provide community for our individual members and corporate partners, wherever they are. Above all, when doing so makes a difference, we challenge the status quo - Job Role Overview - An exciting opportunity has arisen for a Full Stack .NET Web Developer to join our Digital team on a fixed term ...
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MERITUS are recruiting for an SC Cleared Technical Architect / Solution Architect to join our client delivering secure, large-scale technology programmes within the Defence and Central Government sector. As a Technical Architect, you will lead the design and assurance of complex, secure systems across major government programmes. You will ensure architectural integrity across the full delivery lifecycle, working closely with engineering, delivery, and security teams to design scalable, compliant, cloud-based solutions. * Lead technical design of large-scale, complex systems * Define and govern solution architecture and technical designs * Ensure alignment with security, performance, scalability, and compliance standards * Work closely with engineering, delivery, and business stakeholders * Provide technical governance, assurance, and risk evaluation
MERITUS are recruiting for an SC Cleared Technical Architect / Solution Architect to join our client delivering secure, large-scale technology programmes within the Defence and Central Government sector. As a Technical Architect, you will lead the design and assurance of complex, secure systems across major government programmes. You will ensure architectural integrity across the full delivery lifecycle, working closely with engineering, delivery, and security teams to design scalable, compliant, cloud-based solutions. * Lead technical design of large-scale, complex systems * Define and govern solution architecture and technical designs * Ensure alignment with security, performance, scalability, and compliance standards * Work closely with engineering, delivery, and business stakeholders * Provide technical governance, assurance, and risk evaluation
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Lead Full Stack Developer (.NET & React)
Lead Full Stack Developer (.NET & React)
TEAM
Coley, Reading (RG1), RG1 7QG
£70,000 - £80,000 + Benefits
This Lead Full Stack Developer role is an opportunity to take ownership of AI-powered products that are already delivering measurable improvements across UK public services. You'll combine modern front-end engineering, scalable cloud-based development and emerging AI technologies to shape products that reduce demand on services, improve outcomes and drive productivity at scale. Your technical decisions will directly influence product direction, architecture and the next generation of AI-enabled solutions. Working fully remotely, with quarterly visits to Basingstoke (expenses covered), you'll have the freedom to help build innovative products from concept through to delivery. Whats in it for you * Fully remote working with quarterly travel to Basingstoke fully expensed * Salary of £70,000 - £80,000 plus benefits package
This Lead Full Stack Developer role is an opportunity to take ownership of AI-powered products that are already delivering measurable improvements across UK public services. You'll combine modern front-end engineering, scalable cloud-based development and emerging AI technologies to shape products that reduce demand on services, improve outcomes and drive productivity at scale. Your technical decisions will directly influence product direction, architecture and the next generation of AI-enabled solutions. Working fully remotely, with quarterly visits to Basingstoke (expenses covered), you'll have the freedom to help build innovative products from concept through to delivery. Whats in it for you * Fully remote working with quarterly travel to Basingstoke fully expensed * Salary of £70,000 - £80,000 plus benefits package
FEATURED
API integration or data engineering background
API integration or data engineering background
Working closely with the engineering and integration support teams along with communicating externally with Dexory's customers, you will develop custom parsers, API integrations, and data transformation logic to enable our robots to understand each customer's unique warehouse management system. * Building custom API integrations to retrieve real-time data from customer warehouse management systems;
Working closely with the engineering and integration support teams along with communicating externally with Dexory's customers, you will develop custom parsers, API integrations, and data transformation logic to enable our robots to understand each customer's unique warehouse management system. * Building custom API integrations to retrieve real-time data from customer warehouse management systems;
Delivering back-end development including API design and working with multiple database paradigms. * Solid knowledge of web and cloud technologies, security, communications, and API based architectures, ideally within IoT or scientific systems.
Delivering back-end development including API design and working with multiple database paradigms. * Solid knowledge of web and cloud technologies, security, communications, and API based architectures, ideally within IoT or scientific systems.
Oversee automated testing across API and service layers, UI (E2E and accessibility), and infrastructure and deployment workflows.
Oversee automated testing across API and service layers, UI (E2E and accessibility), and infrastructure and deployment workflows.
We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
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435 exact matches jobs are outside your preferred location
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Senior Test Analyst (API & Integration Testing) - Contract
Senior Test Analyst (API & Integration Testing) - Contract
Harvey Nash
Milton Keynes (MK1)
£350 - £400 per day
Our customer, a leading automotive organisation, is seeking an experienced Senior Test Analyst to support a major transformation programme involving complex system integrations, data migration activities and API-driven applications. This is a hands-on role requiring strong experience across API testing, manual testing and integration testing. * Strong commercial experience in API Testing * Hands-on experience using Postman for API validation and testing
Our customer, a leading automotive organisation, is seeking an experienced Senior Test Analyst to support a major transformation programme involving complex system integrations, data migration activities and API-driven applications. This is a hands-on role requiring strong experience across API testing, manual testing and integration testing. * Strong commercial experience in API Testing * Hands-on experience using Postman for API validation and testing
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Software Developer - Full Stack
Software Developer - Full Stack
AWD Online
Hounslow (TW4)
From £35,000 to £40,000 per annum pro rata + Benefits
API Knowledge: Familiarity with RESTful APIs, microservices and integration patterns
API Knowledge: Familiarity with RESTful APIs, microservices and integration patterns
FS React Native Developer - Trading London Outside IR35
FS React Native Developer - Trading London Outside IR35
Transparent Technology
London
£450 - £500 per day
Full-Stack Developer (React Native / Java) | London Hybrid | FinTech | Outside IR35 | React, React Native, Java, AWS | £450-500/day - A growing financial technology company is scaling its engineering team as it builds the next generation of modern web and mobile products for global users. With continued investment into digital platforms and infrastructure, they are looking for experienced Full-Stack Developers to support a major product and technology transformation programme. This role will focus on building scalable applications using React or React Native alongside backend services and APIs using Java. You'll work across frontend architecture, integrations, CI/CD pipelines, microservices, and cloud-native systems, helping deliver secure, high-performance products in a collaborative engineering environment. * 6+ years of full-stack engineering experience
Full-Stack Developer (React Native / Java) | London Hybrid | FinTech | Outside IR35 | React, React Native, Java, AWS | £450-500/day - A growing financial technology company is scaling its engineering team as it builds the next generation of modern web and mobile products for global users. With continued investment into digital platforms and infrastructure, they are looking for experienced Full-Stack Developers to support a major product and technology transformation programme. This role will focus on building scalable applications using React or React Native alongside backend services and APIs using Java. You'll work across frontend architecture, integrations, CI/CD pipelines, microservices, and cloud-native systems, helping deliver secure, high-performance products in a collaborative engineering environment. * 6+ years of full-stack engineering experience
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Enterprise integration patterns (API, event-driven, messaging)
Enterprise integration patterns (API, event-driven, messaging)
FEATURED
Integration architecture: microservices, API gateways, event-driven architectures, event brokers (Kafka), queues - handling 120+ integration points across systems and legacy stacks API Development & Integration - Strong expertise in API lifecycle design usingOpenAPIspecifications (OAS) - can read and write API specs - TMF Open API
Integration architecture: microservices, API gateways, event-driven architectures, event brokers (Kafka), queues - handling 120+ integration points across systems and legacy stacks API Development & Integration - Strong expertise in API lifecycle design usingOpenAPIspecifications (OAS) - can read and write API specs - TMF Open API
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Strong understanding of API-driven architectures, event-driven systems, and integration patterns
Strong understanding of API-driven architectures, event-driven systems, and integration patterns
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The Microsoft Entra ID Architect is responsible for defining the target state architecture for enterprise identity using Microsoft Entra ID, with a strong focus on Identity Governance, Secure Access, and API driven provisioning. Design API first provisioning patterns using - Microsoft Graph API Proven architecture experience with Graph API, SCIM, Lifecycle Workflows.
The Microsoft Entra ID Architect is responsible for defining the target state architecture for enterprise identity using Microsoft Entra ID, with a strong focus on Identity Governance, Secure Access, and API driven provisioning. Design API first provisioning patterns using - Microsoft Graph API Proven architecture experience with Graph API, SCIM, Lifecycle Workflows.
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API development (REST, OpenAPI)
API development (REST, OpenAPI)
FEATURED
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API Creation and Integration
API Creation and Integration
FEATURED
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Connectivity: Design PL/SQL interfaces to handle RESTful API operations.
Connectivity: Design PL/SQL interfaces to handle RESTful API operations.
FEATURED
Troubleshooters: You should be comfortable with API integrations, OAuth, and web standards.
Troubleshooters: You should be comfortable with API integrations, OAuth, and web standards.
FEATURED
Technical Troubleshooting: Experience with Chrome Developer Tools, API integrations, and investigating error codes.
Technical Troubleshooting: Experience with Chrome Developer Tools, API integrations, and investigating error codes.
FEATURED
Related Jobs
Locations
- The City, City (EC2)
- The City, City (EC3)
- Cambourne
- Clerkenwell
- Coley
- Fenny Lock
- Ferndale
- Harwell
- Heathcote
- Hinxton
- City of London
- Cambridge
- Farnborough
- Reading
- South West London
- Milton Keynes
- Oxford
- Basingstoke
- Swindon
- Warwick
- London
- Hampshire
- Cambridgeshire
- Berkshire
- Buckinghamshire
- Oxfordshire
- Surrey
- Warwickshire
- Wiltshire
- Hertfordshire
- South East
- East Anglia
- Midlands
- South West
- West Midlands
- East Midlands