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92 API jobs in Hertfordshire + 20 miles
386 exact matches jobs are outside your preferred location
Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vus/Svelte Writing unit tests Modern front end testing frameworks like Jest Experience of consuming and modifying CI/CD pipelines Experience working with API of varying types and integrating with backend data Experience of working with cloud technologies (Azure/AWS) Capable of teaching/mentoring/pair-programming with other members of the team - Experience of Docker Experience of working in a Continuous Delivery or Deployment environment Experience of developing any backend API frameworks * Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
Expert knowledge of HTML, CSS, JavaScript Experience developing Frontend Application using Modern Javascript frameworks like React/Vus/Svelte Writing unit tests Modern front end testing frameworks like Jest Experience of consuming and modifying CI/CD pipelines Experience working with API of varying types and integrating with backend data Experience of working with cloud technologies (Azure/AWS) Capable of teaching/mentoring/pair-programming with other members of the team - Experience of Docker Experience of working in a Continuous Delivery or Deployment environment Experience of developing any backend API frameworks * Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
Collaborate closely with backend teams to evolve API contracts, caching and data-fetching strategies for resilient, scalable UX
Collaborate closely with backend teams to evolve API contracts, caching and data-fetching strategies for resilient, scalable UX
GraphQL and API design : Building, consuming, and documenting APIs, ideally with experience in GraphQL.
GraphQL and API design : Building, consuming, and documenting APIs, ideally with experience in GraphQL.
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The Tyk API Management platform is helping to drive the connected world and power new products and services. Weve started by building an API Management platform. As a Mid-Level Full-Stack Engineer (React + Go) at Tyk, youll be responsible for designing and building compelling solutions for our Dashboard and API Gateway products. * Contribute to the direction of dashboard UI development and API functionality * Understanding of distributed systems design fundamentals and secure API design (REST and/or gRPC) * API management experience
The Tyk API Management platform is helping to drive the connected world and power new products and services. Weve started by building an API Management platform. As a Mid-Level Full-Stack Engineer (React + Go) at Tyk, youll be responsible for designing and building compelling solutions for our Dashboard and API Gateway products. * Contribute to the direction of dashboard UI development and API functionality * Understanding of distributed systems design fundamentals and secure API design (REST and/or gRPC) * API management experience
Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
Experience working with API of varying types and integrating with backend data * Experience of developing any backend API frameworks
Work with back-end teams to align API integration and interface logic.
Work with back-end teams to align API integration and interface logic.
.NET Code development in terms of API development / Azure Functions / Logic Apps / C# This may be a great opportunity for someone in an IT role that wants to move into a more specialised / technical role or someone with a demonstrable passion for integration and API development, either self-taught or certified in, looking to put their skills into practice with a very strong technical team in a complex environment.
.NET Code development in terms of API development / Azure Functions / Logic Apps / C# This may be a great opportunity for someone in an IT role that wants to move into a more specialised / technical role or someone with a demonstrable passion for integration and API development, either self-taught or certified in, looking to put their skills into practice with a very strong technical team in a complex environment.
Experience with front-end JS frameworks (ideally Vue.js 3 + Composition API)
Experience with front-end JS frameworks (ideally Vue.js 3 + Composition API)
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Experience interacting with a variety of API technologies, such as REST, JSON and XML * Experience working with AWS, using services such as ECS, S3 and API Gateway (Optional)
Experience interacting with a variety of API technologies, such as REST, JSON and XML * Experience working with AWS, using services such as ECS, S3 and API Gateway (Optional)
Knowledge of API design principles, patterns (SOAP, REST), data formats (JSON, XML), and hands-on experience executing APIs through scripting.
Knowledge of API design principles, patterns (SOAP, REST), data formats (JSON, XML), and hands-on experience executing APIs through scripting.
Implement and optimize robust API integrations (REST and GraphQL) with backend systems. * Reliable delivery of API-driven features that meet product requirements. * Demonstrated experience building and maintaining API integrations (REST, GraphQL, or gRPC).
Implement and optimize robust API integrations (REST and GraphQL) with backend systems. * Reliable delivery of API-driven features that meet product requirements. * Demonstrated experience building and maintaining API integrations (REST, GraphQL, or gRPC).
Advanced understanding of good practice API development, integration, and testing (e.g. RESTful services, GraphQL). * Experience with both front-end (e.g. React, TypeScript) and back-end (.NET C#, ASP.NET) development, especially related to API consumption good practices such as schema validation, or event-driven architectures (e.g. webhooks).
Advanced understanding of good practice API development, integration, and testing (e.g. RESTful services, GraphQL). * Experience with both front-end (e.g. React, TypeScript) and back-end (.NET C#, ASP.NET) development, especially related to API consumption good practices such as schema validation, or event-driven architectures (e.g. webhooks).
Comprehensive understanding of pipeline industry standards (inc API, ASME, ASTM, BS, GIS, IGEM, PD)
Comprehensive understanding of pipeline industry standards (inc API, ASME, ASTM, BS, GIS, IGEM, PD)
Familiarity with application programming interfaces (API)
Familiarity with application programming interfaces (API)
Institutional User Experience (UX/API) This includes driving excellence across both the Web UI and API architecture, ensuring resilience, scalability, and ease of integration for institutional clients. * Proven ability to translate complex financial and security requirements into intuitive, compliance-aware user journeys for web platforms and B2B API integrations.
Institutional User Experience (UX/API) This includes driving excellence across both the Web UI and API architecture, ensuring resilience, scalability, and ease of integration for institutional clients. * Proven ability to translate complex financial and security requirements into intuitive, compliance-aware user journeys for web platforms and B2B API integrations.
We are looking for a skilled Java Tech Lead to design, develop, and lead implementation of scalable enterprise solutions. The ideal candidate will have strong hands-on expertise in Core Java , Spring Framework (Spring 11/17) , and Microservices architecture , along with solid understanding of CI/CD and deployment tools. * Lead development of Java-based microservices and REST APIs. * Design and implement scalable, maintainable solutions using OOPS principles. * Guide team members on coding best practices and solution design. * Oversee deployment pipelines using Jenkins, Terraform, or Ansible. * Collaborate with UI (Angular) and database teams for full-stack integration. * Ensure quality delivery through effective design and code reviews.
We are looking for a skilled Java Tech Lead to design, develop, and lead implementation of scalable enterprise solutions. The ideal candidate will have strong hands-on expertise in Core Java , Spring Framework (Spring 11/17) , and Microservices architecture , along with solid understanding of CI/CD and deployment tools. * Lead development of Java-based microservices and REST APIs. * Design and implement scalable, maintainable solutions using OOPS principles. * Guide team members on coding best practices and solution design. * Oversee deployment pipelines using Jenkins, Terraform, or Ansible. * Collaborate with UI (Angular) and database teams for full-stack integration. * Ensure quality delivery through effective design and code reviews.
Role: Java Engineer - Native Apps - Location: London office / Hybrid (2 days per week in the office) Reporting to: Engineering Manager - Rightmoves Native Apps are central to how millions of people find their next home. We are investing in creating faster, smarter, and more personalised mobile experiences, built on modern technology, powered by data, and driven by teams who care deeply about quality and collaboration. As part of this transformation, the Native Apps engineering group is becoming a space for experimentation and innovation, where backend systems and mobile experiences come together more seamlessly than ever before. Joining now means helping to shape how we design, build, and scale the technology that powers the UKs most trusted property platform, while contributing to an inclusive engineering culture that values learning, creativity, and impact. The Role
Role: Java Engineer - Native Apps - Location: London office / Hybrid (2 days per week in the office) Reporting to: Engineering Manager - Rightmoves Native Apps are central to how millions of people find their next home. We are investing in creating faster, smarter, and more personalised mobile experiences, built on modern technology, powered by data, and driven by teams who care deeply about quality and collaboration. As part of this transformation, the Native Apps engineering group is becoming a space for experimentation and innovation, where backend systems and mobile experiences come together more seamlessly than ever before. Joining now means helping to shape how we design, build, and scale the technology that powers the UKs most trusted property platform, while contributing to an inclusive engineering culture that values learning, creativity, and impact. The Role
Remote (UK, Netherlands, Germany) About Us - Studio 397 and Motorsport Games are the video game developer and publishers of Le Mans Ultimate the Official Video Game of the FIA World Endurance Championship and 24 Hours of Le Mans available now on Steam. We also run the popular rFactor 2 simulation title and have created an online matchmaking and player management system for racing games called RaceControl. We are a close-knit, passionate team committed to creating the most realistic motorsport simulations in the world. Our team works remotely, primarily across Europe, and we pride ourselves on technical excellence, collaboration, and innovation. The Role - We are seeking a Senior Console Developer to play a key role in developing the next generation of our technology for modern console platforms (PlayStation, Xbox).
Remote (UK, Netherlands, Germany) About Us - Studio 397 and Motorsport Games are the video game developer and publishers of Le Mans Ultimate the Official Video Game of the FIA World Endurance Championship and 24 Hours of Le Mans available now on Steam. We also run the popular rFactor 2 simulation title and have created an online matchmaking and player management system for racing games called RaceControl. We are a close-knit, passionate team committed to creating the most realistic motorsport simulations in the world. Our team works remotely, primarily across Europe, and we pride ourselves on technical excellence, collaboration, and innovation. The Role - We are seeking a Senior Console Developer to play a key role in developing the next generation of our technology for modern console platforms (PlayStation, Xbox).
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PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Lead Software Engineers to join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Lead Software Engineers to join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
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PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Senior Full Stack Software Engineers to join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Senior Full Stack Software Engineers to join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
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PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Senior Software Engineersto join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
PolyAI automates customer service through lifelike voice assistants that let customers lead a conversation. Our voice assistants make it possible for businesses to deliver outstanding customer service that rivals their human agents. Our customers, which include the worlds leading logos, are expanding how they use our platform, driving automation of critical customer service operations and integrating PolyAI into their daily customer service workflows. Were looking for talented Senior Software Engineersto join one of our three high impact teams: Runtime, Data, and Product Engineering. All three teams work closely together, share high engineering standards, and solve challenging technical problems at scale, but each has its own mission and area of focus. * Runtime: own the global infrastructure that powers real-time voice interactions.
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At Bluecrest, were more than a health assessment provider - were the health intelligence company. Since our founding in 2012, weve been on a mission to make high-quality, affordable health monitoring accessible to everyone across the UK and Ireland. Serving both individual customers and businesses, we empower people to take control of their wellbeing through early detection and long-term health insights. Our purpose is simple yet powerful: to give everyone confidence in their health. By 2028, our vision is to be the UKs leading health intelligence company, delivering vital health insights to over a million people every single day. Were proud to help people live healthier for longer, and we do it by making personal health monitoring easy, affordable, and impactful. Join us in shaping the future of health intelligence, where your work makes a real difference, every day.
At Bluecrest, were more than a health assessment provider - were the health intelligence company. Since our founding in 2012, weve been on a mission to make high-quality, affordable health monitoring accessible to everyone across the UK and Ireland. Serving both individual customers and businesses, we empower people to take control of their wellbeing through early detection and long-term health insights. Our purpose is simple yet powerful: to give everyone confidence in their health. By 2028, our vision is to be the UKs leading health intelligence company, delivering vital health insights to over a million people every single day. Were proud to help people live healthier for longer, and we do it by making personal health monitoring easy, affordable, and impactful. Join us in shaping the future of health intelligence, where your work makes a real difference, every day.
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Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But we're more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks , we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA , and we have an insatiable hunger to 'wow'! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But we're more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks , we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA , and we have an insatiable hunger to 'wow'! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
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Please note you must be able to pass security clearance for this role (NPPV 3) due to our clients requirements, to gain this level of clearance you must have been a resident living in the UK for the past 3 years - About This Role - Youve built up solid experience working with Oracle technologies, and youre ready for something that feels a bit more meaningful. Maybe its the chance to work more closely with clients. Maybe its the variety, the challenge, or just being part of a team where your knowledge actually matters. In this role, youll be part of the Managed Services team at Namos, supporting a mix of clients across different sectors, each with their own priorities and quirks. Youll step in when issues need fixing, but you wont stop there. Our aim is to improve how clients use their systems, not just keep things ticking along.
Please note you must be able to pass security clearance for this role (NPPV 3) due to our clients requirements, to gain this level of clearance you must have been a resident living in the UK for the past 3 years - About This Role - Youve built up solid experience working with Oracle technologies, and youre ready for something that feels a bit more meaningful. Maybe its the chance to work more closely with clients. Maybe its the variety, the challenge, or just being part of a team where your knowledge actually matters. In this role, youll be part of the Managed Services team at Namos, supporting a mix of clients across different sectors, each with their own priorities and quirks. Youll step in when issues need fixing, but you wont stop there. Our aim is to improve how clients use their systems, not just keep things ticking along.
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At Bluecrest, were more than a health assessment provider - were the health intelligence company. Since our founding in 2012, weve been on a mission to make high-quality, affordable health monitoring accessible to everyone across the UK and Ireland. Serving both individual customers and businesses, we empower people to take control of their wellbeing through early detection and long-term health insights. Our purpose is simple yet powerful: to give everyone confidence in their health. By 2028, our vision is to be the UKs leading health intelligence company, delivering vital health insights to over a million people every single day. Were proud to help people live healthier for longer, and we do it by making personal health monitoring easy, affordable, and impactful. Join us in shaping the future of health intelligence, where your work makes a real difference, every day.
At Bluecrest, were more than a health assessment provider - were the health intelligence company. Since our founding in 2012, weve been on a mission to make high-quality, affordable health monitoring accessible to everyone across the UK and Ireland. Serving both individual customers and businesses, we empower people to take control of their wellbeing through early detection and long-term health insights. Our purpose is simple yet powerful: to give everyone confidence in their health. By 2028, our vision is to be the UKs leading health intelligence company, delivering vital health insights to over a million people every single day. Were proud to help people live healthier for longer, and we do it by making personal health monitoring easy, affordable, and impactful. Join us in shaping the future of health intelligence, where your work makes a real difference, every day.
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