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47 Contract API jobs in Sunbury-On-Thames + 20 miles
173 exact matches jobs are outside your preferred location
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Senior Frontend Engineer (Next.js / React) High-Growth SaaS | Build Elegant, User-First Products - In partnership with Robert Half Limited. We're a high-growth SaaS company scaling fast, and we're looking for a Senior Frontend Engineer to join our team. This is a chance to shape products used by thousands of customers, working with modern tools and a team that values craftsmanship, speed, and impact. Hybrid Working in the City of London, London. 3 days in the office and 2 days from home. What You'll Do * Build and scale complex, high-performing web applications with Next.js and React * Collaborate with design and product to create polished, intuitive, responsive interfaces * Drive improvements in performance, accessibility, and scalability across platforms * Contribute to architecture decisions, code reviews, and design discussions
Senior Frontend Engineer (Next.js / React) High-Growth SaaS | Build Elegant, User-First Products - In partnership with Robert Half Limited. We're a high-growth SaaS company scaling fast, and we're looking for a Senior Frontend Engineer to join our team. This is a chance to shape products used by thousands of customers, working with modern tools and a team that values craftsmanship, speed, and impact. Hybrid Working in the City of London, London. 3 days in the office and 2 days from home. What You'll Do * Build and scale complex, high-performing web applications with Next.js and React * Collaborate with design and product to create polished, intuitive, responsive interfaces * Drive improvements in performance, accessibility, and scalability across platforms * Contribute to architecture decisions, code reviews, and design discussions
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Software Developer (Java / Kotlin / React.js) Hybrid London or Munich £70,000 - £90,000 p/a + Benefits - An innovative digital insurance platform is looking for a talented Full Stack Software Developer to join its growing international team. The business is transforming the way consumers engage with insurance, creating simple, transparent, and personalised experiences, and now expanding into new products and markets. As part of a small, highly skilled cross-functional team of engineers, designers, and domain experts, youll have direct input into platform architecture and strategy, working on impactful projects from day one. This is an exciting opportunity to shape a fast-scaling platform while working with modern tools and practices. Key Responsibilities * Lead development of core platform services and REST APIs in Kotlin.
Software Developer (Java / Kotlin / React.js) Hybrid London or Munich £70,000 - £90,000 p/a + Benefits - An innovative digital insurance platform is looking for a talented Full Stack Software Developer to join its growing international team. The business is transforming the way consumers engage with insurance, creating simple, transparent, and personalised experiences, and now expanding into new products and markets. As part of a small, highly skilled cross-functional team of engineers, designers, and domain experts, youll have direct input into platform architecture and strategy, working on impactful projects from day one. This is an exciting opportunity to shape a fast-scaling platform while working with modern tools and practices. Key Responsibilities * Lead development of core platform services and REST APIs in Kotlin.
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Role Full Stack Developer - Location - London (Remote) Salary - £70K - £85K - Role Type Permanent - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched permanent positions. Overview - Are you a talented Full Stack Developer eager to make an immediate impact on exciting projects? Our client is seeking an experienced Full Stack development professional for a hybrid position to be based in Central London, but operating remotely * Design and implement robust web applications using cutting-edge technologies and frameworks. * Collaborate with cross-functional teams to drive the full development lifecycle, from concept to deployment. * Engage in continuous learning and professional development, enhancing your skills and career prospects.
Role Full Stack Developer - Location - London (Remote) Salary - £70K - £85K - Role Type Permanent - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched permanent positions. Overview - Are you a talented Full Stack Developer eager to make an immediate impact on exciting projects? Our client is seeking an experienced Full Stack development professional for a hybrid position to be based in Central London, but operating remotely * Design and implement robust web applications using cutting-edge technologies and frameworks. * Collaborate with cross-functional teams to drive the full development lifecycle, from concept to deployment. * Engage in continuous learning and professional development, enhancing your skills and career prospects.
Role: API Integration Engineer - We are seeking a highly skilled API Integration Engineer to join our technology team. * Design, build, and maintain API integrations for telecom OSS/BSS systems, Openreach APIs, supplier platforms, and enterprise applications. * Manage API version upgrades and partner change notifications. * Apply robust fault handling, retry logic, and back-off strategies for resilient API operations. * Design and maintain CI/CD pipelines using GitLab, Azure DevOps, and Jenkins for API and data workflow deployments. * Work closely with the Chief Enterprise & Security Officer and enterprise architects to co-develop a five-year, API-first roadmap for intelligent, context-aware systems. * Provide technical leadership and guidance on mode
Role: API Integration Engineer - We are seeking a highly skilled API Integration Engineer to join our technology team. * Design, build, and maintain API integrations for telecom OSS/BSS systems, Openreach APIs, supplier platforms, and enterprise applications. * Manage API version upgrades and partner change notifications. * Apply robust fault handling, retry logic, and back-off strategies for resilient API operations. * Design and maintain CI/CD pipelines using GitLab, Azure DevOps, and Jenkins for API and data workflow deployments. * Work closely with the Chief Enterprise & Security Officer and enterprise architects to co-develop a five-year, API-first roadmap for intelligent, context-aware systems. * Provide technical leadership and guidance on mode
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4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
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Experience with API design and development for both internal and external use cases
Experience with API design and development for both internal and external use cases
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Technical Architect
Technical Architect
Inspire People
London
£71590 - £85413 per annum + 29% pension + Civil Service benefits
Track record designing and delivering secure cloud solutions using AWS/Azure plus ideally API-driven architecture
Track record designing and delivering secure cloud solutions using AWS/Azure plus ideally API-driven architecture
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
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Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
Work closely with the team to develop new features, such as better interpretation layers, enhanced data decoding, and improved API coverage for various blockchain data.
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You may also be asked to support the testing of releases for our Client API and Mobile Application. * API testing - building out automated test coverage of our RESTful Client API * Collaborate with the external contractor QA resource on specific projects (e.g. automating API testing) and as an additional resource when required
You may also be asked to support the testing of releases for our Client API and Mobile Application. * API testing - building out automated test coverage of our RESTful Client API * Collaborate with the external contractor QA resource on specific projects (e.g. automating API testing) and as an additional resource when required
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Location & Working Model: Flexible Remote or hybrid options available depending on location - Employment Type: Permanent - About TxODDS - TxODDS is a premier provider of ultra low-latency, accurate odds data, fast scores, and innovative betting solutions for the global sports betting industry. With offices in London, Chicago, and Belgrade and team members working worldwide we deliver cutting-edge technology and data products that power some of the worlds top sportsbooks. About the Role - Were looking for a Developer to join our Data Acquisition team. This role plays a key part in building and maintaining the systems that power our real-time data delivery. Youll work closely with cross-functional teams to ensure the accuracy, reliability, and speed of the data we provide to our customers. In this role, youll take ownership of key responsibilities that help drive team a
Location & Working Model: Flexible Remote or hybrid options available depending on location - Employment Type: Permanent - About TxODDS - TxODDS is a premier provider of ultra low-latency, accurate odds data, fast scores, and innovative betting solutions for the global sports betting industry. With offices in London, Chicago, and Belgrade and team members working worldwide we deliver cutting-edge technology and data products that power some of the worlds top sportsbooks. About the Role - Were looking for a Developer to join our Data Acquisition team. This role plays a key part in building and maintaining the systems that power our real-time data delivery. Youll work closely with cross-functional teams to ensure the accuracy, reliability, and speed of the data we provide to our customers. In this role, youll take ownership of key responsibilities that help drive team a
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Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
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Support customers in achieving effective and efficient SDK and API integrations with Braze
Support customers in achieving effective and efficient SDK and API integrations with Braze
Skilled in designing and building REST APIs and understanding REST API architecture
Skilled in designing and building REST APIs and understanding REST API architecture
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SharePoint CSOM API
SharePoint CSOM API
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Identify opportunities for process improvements within the CRM system and recommend efficiency solutions, including integrations via API or native 3rd party tools and datasets.
Identify opportunities for process improvements within the CRM system and recommend efficiency solutions, including integrations via API or native 3rd party tools and datasets.
Knowledge of REST APIs and tools for testing API endpoints
Knowledge of REST APIs and tools for testing API endpoints
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
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Additionally, our apps and API are trusted by tens of thousands of drivers and fleets including Blue Badge innovators Motability Operations.
Additionally, our apps and API are trusted by tens of thousands of drivers and fleets including Blue Badge innovators Motability Operations.
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Our frontend stack includes multiple applications using React, Next.js and Storybook; using data from API services and a WordPress CMS.
Our frontend stack includes multiple applications using React, Next.js and Storybook; using data from API services and a WordPress CMS.
Document integration flows, including API specs, data mapping, and system interactions
Document integration flows, including API specs, data mapping, and system interactions
Experience in REST API, GraphQL / gRPCdesign and development.
Experience in REST API, GraphQL / gRPCdesign and development.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
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The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Strong understanding of APIs; experience in API usage is mandatory.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Strong understanding of APIs; experience in API usage is mandatory.
Ability to design and build end-to-end applications and API integrations.
Ability to design and build end-to-end applications and API integrations.