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        • Hertfordshire

        35 Contract API jobs in Hertford + 20 miles

        222 exact matches jobs are outside your preferred location

        Senior QA Engineer

        Verisk Analytics
        South East
        Competitive
        Performing automation and API testing when required. * API automation testing using JavaScript * Experience in API and integration testing
        Performing automation and API testing when required. * API automation testing using JavaScript * Experience in API and integration testing
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        Senior C# Software Engineer

        Spectrum It Recruitment Limited
        UK
        £60000 - £65000 per annum
        Due to continued success, they are looking to grow one of their key software engineering teams working on some of their most successful SaaS products. The Senior C# Software Engineer will join an established team developing business logic for Windows based products. Key experience * Extensive commercial experience in C# Windows programming * Multithreading / TPL * XML * SQL * Version control * Unit testing Experience in any of the following areas would be advantageous but is not a prerequisite * WIX installers * Windows services eg Active Directory, Exchange etc * Client-server architecture development * M365 APIs If you are seeking a role of this nature please get in touch for more information. Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
        Due to continued success, they are looking to grow one of their key software engineering teams working on some of their most successful SaaS products. The Senior C# Software Engineer will join an established team developing business logic for Windows based products. Key experience * Extensive commercial experience in C# Windows programming * Multithreading / TPL * XML * SQL * Version control * Unit testing Experience in any of the following areas would be advantageous but is not a prerequisite * WIX installers * Windows services eg Active Directory, Exchange etc * Client-server architecture development * M365 APIs If you are seeking a role of this nature please get in touch for more information. Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
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        Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
        Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
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        Remote, with occasional London travel £450 to £500 p/d - Inside IR35 3-month initial contract (Immediate start) iO Associates is partnered with a Software Development Consultancy delivering key Public Sector projects. We're looking for Front-End Developers (React and Angular) with a track record of working in Government, Council, or wider Public Sector environments. * Strong hands-on experience with React and Angular * Solid understanding of core web development (HTML, CSS, JavaScript, APIs) * Previous experience delivering solutions within Gov / Council / Public Sector projects * Ability to work in an agile, collaborative environment If this sounds like you, drop me a DM or send your CV directly.
        Remote, with occasional London travel £450 to £500 p/d - Inside IR35 3-month initial contract (Immediate start) iO Associates is partnered with a Software Development Consultancy delivering key Public Sector projects. We're looking for Front-End Developers (React and Angular) with a track record of working in Government, Council, or wider Public Sector environments. * Strong hands-on experience with React and Angular * Solid understanding of core web development (HTML, CSS, JavaScript, APIs) * Previous experience delivering solutions within Gov / Council / Public Sector projects * Ability to work in an agile, collaborative environment If this sounds like you, drop me a DM or send your CV directly.
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        Expertise in Salesforce deployment strategies, including change sets, Salesforce DX, and metadata API. * Experience in Salesforce API integration (REST, SOAP, Platform Events).
        Expertise in Salesforce deployment strategies, including change sets, Salesforce DX, and metadata API. * Experience in Salesforce API integration (REST, SOAP, Platform Events).
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        API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. * 5+ years of hands-on experience in a technical integration role, such as an Integration Developer or API Specialist. * Expertise in API design and development (REST, SOAP, webhooks).
        API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. * 5+ years of hands-on experience in a technical integration role, such as an Integration Developer or API Specialist. * Expertise in API design and development (REST, SOAP, webhooks).
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        Recurring Payments Innovation: Build rock-solid API infrastructure and platform capabilities for pull payment functionality, tackling complex collection challenges head-on. * B2B Technical Product Expertise: You've got solid experience with API products, PaaS solutions, or technical SaaS platforms and love building merchant banking infrastructure for developers who integrate multiple financial endpoints and banking APIs.
        Recurring Payments Innovation: Build rock-solid API infrastructure and platform capabilities for pull payment functionality, tackling complex collection challenges head-on. * B2B Technical Product Expertise: You've got solid experience with API products, PaaS solutions, or technical SaaS platforms and love building merchant banking infrastructure for developers who integrate multiple financial endpoints and banking APIs.
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        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
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        We are looking for a K8 Systems Developer to design, develop, implement, and support solutions exclusively for the enhancement of the EPOS application within our Trade business. This role involves working with Product Owners, Business Analysts, and Technical Architects to deliver effective solutions for depot colleagues. It is a full-time permanent role working 37.5 hours per week, occasional weekend work, and participation in a shared on-call support rota. What you will be doing * Developing and implementing K8 Reports following best practices for user experience and performance. * Developing and implementing DX transfers and DX transforms to support K8 and SAP end to end integration. * Developing and implementing K8 Format Stationaries using Print Manager. * Supporting end-users by troubleshooting system and integration issues, maintaining optimal performance.
        We are looking for a K8 Systems Developer to design, develop, implement, and support solutions exclusively for the enhancement of the EPOS application within our Trade business. This role involves working with Product Owners, Business Analysts, and Technical Architects to deliver effective solutions for depot colleagues. It is a full-time permanent role working 37.5 hours per week, occasional weekend work, and participation in a shared on-call support rota. What you will be doing * Developing and implementing K8 Reports following best practices for user experience and performance. * Developing and implementing DX transfers and DX transforms to support K8 and SAP end to end integration. * Developing and implementing K8 Format Stationaries using Print Manager. * Supporting end-users by troubleshooting system and integration issues, maintaining optimal performance.
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        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are currently seeking an experienced Senior Test Automation Engineer to join our European Regulatory Operations Scrum team. The Senior Test Automation Engineer will have a background in trading or investment banking domain and will be working within the scrum team to design and run automated tests and to help de
        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are currently seeking an experienced Senior Test Automation Engineer to join our European Regulatory Operations Scrum team. The Senior Test Automation Engineer will have a background in trading or investment banking domain and will be working within the scrum team to design and run automated tests and to help de
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        NVIDIA is looking for an expert software engineer to help us expand our catalog of Device eXtension (Dx) APIs for our math libraries. For over a decade, NVIDIA's accelerated computing platform has revolutionized HPC and AI with applications ranging from COVID-19 research to autonomous machines. Did you know that our team develops the GPU-accelerated mathematical libraries that make all of this possible? The hardware and software accelerated computing ecosystem is constantly evolving, including shifts towards hybrid backends, deep integration with high-level languages and ecosystems (such as Python, Numpy, JAX, MLIR), and optimization at runtime for maximum flexibility and performance. Our Dx APIs allow developers to embed highly-optimized mathematical operations in their applications for these and other scenarios.
        NVIDIA is looking for an expert software engineer to help us expand our catalog of Device eXtension (Dx) APIs for our math libraries. For over a decade, NVIDIA's accelerated computing platform has revolutionized HPC and AI with applications ranging from COVID-19 research to autonomous machines. Did you know that our team develops the GPU-accelerated mathematical libraries that make all of this possible? The hardware and software accelerated computing ecosystem is constantly evolving, including shifts towards hybrid backends, deep integration with high-level languages and ecosystems (such as Python, Numpy, JAX, MLIR), and optimization at runtime for maximum flexibility and performance. Our Dx APIs allow developers to embed highly-optimized mathematical operations in their applications for these and other scenarios.
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        At Holland & Barrett, we're on a mission to make health and wellness a way of life for everyone and technology is at the heart of how we make that happen. As we continue our journey to become a leading omni-channel retailer, we're investing heavily in innovative tech to deliver faster, more personalised, and more convenient experiences for our customers both online and in-store. We're collaborative, customer-obsessed, and love working at pace. We embrace cloud-first principles, build solutions tailored to our business (rather than buying off-the-shelf), and embed automation and testing across everything we do from software to infrastructure and data. This role sits within our Online Customer Experience (OCX) vertical the team driving our e-commerce platforms across web and mobile. We're wrapping up a multi-year technical transformation and moving into an exciting new
        At Holland & Barrett, we're on a mission to make health and wellness a way of life for everyone and technology is at the heart of how we make that happen. As we continue our journey to become a leading omni-channel retailer, we're investing heavily in innovative tech to deliver faster, more personalised, and more convenient experiences for our customers both online and in-store. We're collaborative, customer-obsessed, and love working at pace. We embrace cloud-first principles, build solutions tailored to our business (rather than buying off-the-shelf), and embed automation and testing across everything we do from software to infrastructure and data. This role sits within our Online Customer Experience (OCX) vertical the team driving our e-commerce platforms across web and mobile. We're wrapping up a multi-year technical transformation and moving into an exciting new
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        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Mastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions. Artificial Intelligence is at the core of our strategy to make Mastercard stronger an
        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Mastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions. Artificial Intelligence is at the core of our strategy to make Mastercard stronger an
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        Introduction - Together, were working to welcome millions more passengers, while ensuring aviation can continue to be a force for good by leading global efforts in sustainability. At Heathrow, you can be part of this providing solutions that make every journey better for millions each year. That means ensuring we meet the changing needs of the passengers, colleagues and partners who use our airport to work, travel, trade, shop, eat, explore and connect. Our Solutions team covers project management, process improvement, business change, technology, cyber defence, masterplanning, infrastructure and procurement. It brings together people with the skills to deliver prestigious and often large-scale projects, from transforming terminals to making big reductions in our carbon emissions. Every day will test your skills and give you the opportunity to make your mark.
        Introduction - Together, were working to welcome millions more passengers, while ensuring aviation can continue to be a force for good by leading global efforts in sustainability. At Heathrow, you can be part of this providing solutions that make every journey better for millions each year. That means ensuring we meet the changing needs of the passengers, colleagues and partners who use our airport to work, travel, trade, shop, eat, explore and connect. Our Solutions team covers project management, process improvement, business change, technology, cyber defence, masterplanning, infrastructure and procurement. It brings together people with the skills to deliver prestigious and often large-scale projects, from transforming terminals to making big reductions in our carbon emissions. Every day will test your skills and give you the opportunity to make your mark.
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        Frequently Asked Questions

        How many contract API jobs are there in Hertford?
        There are 35 contract API jobs within 20 miles of Hertford available on CWJobs right now.

        What other similar jobs are there to contract API jobs in Hertford?
        As well as contract API jobs in Hertford, you can find contract IT, Software Development, Architecture, amongst many others.