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        80 Contract API jobs in Hertford + 20 miles

        716 exact matches jobs are outside your preferred location

        Salesforce DevOps Lead

        Thames Water Utilities
        South East
        Competitive
        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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        NEW
        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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        NEW
        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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        NEW
        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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        NEWFEATURED
        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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        NEW
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
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        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
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        Java Developers - 100% Remote role - SC Clearance is preferred but will sponsor exceptional applicants - Overview of the Java Developers role - We are looking for highly skilled Java Developers to join a secure government project with a critical deadline. This is an opportunity to work on a large-scale system where your expertise in Java, Spring Boot, and AWS will be essential. You will be part of a collaborative team, building scalable solutions and solving complex problems that have a real impact. Key responsibilities for Java Developers * Design, develop, and deploy backend services using Java and Spring Boot * Build and maintain scalable APIs * Analyse schemas and write optimised SQL queries against large datasets * Work closely with DevOps on Docker containerisation and cloud deployment in AWS * Contribute to architectural decisions and shape technical roadmaps
        Java Developers - 100% Remote role - SC Clearance is preferred but will sponsor exceptional applicants - Overview of the Java Developers role - We are looking for highly skilled Java Developers to join a secure government project with a critical deadline. This is an opportunity to work on a large-scale system where your expertise in Java, Spring Boot, and AWS will be essential. You will be part of a collaborative team, building scalable solutions and solving complex problems that have a real impact. Key responsibilities for Java Developers * Design, develop, and deploy backend services using Java and Spring Boot * Build and maintain scalable APIs * Analyse schemas and write optimised SQL queries against large datasets * Work closely with DevOps on Docker containerisation and cloud deployment in AWS * Contribute to architectural decisions and shape technical roadmaps
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        PREMIUM
        As part of our high-performing Client Insight & Engagement team, youll help us research, define and craft outstanding digital experiences across our growing Analytics product portfolio. Focused on customer desirability you'll be at the forefront of crafting innovative, seamless, and human-centred products that make a real difference for our clients, at scale. Were looking for an experienced Product Research lead to inform and evolve sophisticated product concepts into user-first experiences across multiple industry digital touchpoints and channels. You'll weave design and systems thinking, empathy, and innovation to every stage of the product process, ensuring our products not only meet user needs but exceed expectations. This is more than a research role; its a chance to help define the future of how our clients engage with and experience high value financial solutio
        As part of our high-performing Client Insight & Engagement team, youll help us research, define and craft outstanding digital experiences across our growing Analytics product portfolio. Focused on customer desirability you'll be at the forefront of crafting innovative, seamless, and human-centred products that make a real difference for our clients, at scale. Were looking for an experienced Product Research lead to inform and evolve sophisticated product concepts into user-first experiences across multiple industry digital touchpoints and channels. You'll weave design and systems thinking, empathy, and innovation to every stage of the product process, ensuring our products not only meet user needs but exceed expectations. This is more than a research role; its a chance to help define the future of how our clients engage with and experience high value financial solutio
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        NEW
        We are seeking an experienced Product Engagement specialist to join the Analytics Client Engagement team in London, where you'll drive the narrative strategy behind some of LSEGs most impactful financial analytics products and experiences. As part of our high-performing client insight and engagement team, you will take a lead role to craft and scale brilliant narratives and digital experiences across the Analytics product portfolio for our growing client base and digital experiences. We're looking for a strategic storyteller to lead narrative research and development across our Analytics product and proposition portfolio, someone who knows how to bring clarity to complexity and compose product messaging that not only informs but inspires. In this role, you'll shape and drive a unified approach that cuts across product silos and regional teams, ensuring every word ...
        We are seeking an experienced Product Engagement specialist to join the Analytics Client Engagement team in London, where you'll drive the narrative strategy behind some of LSEGs most impactful financial analytics products and experiences. As part of our high-performing client insight and engagement team, you will take a lead role to craft and scale brilliant narratives and digital experiences across the Analytics product portfolio for our growing client base and digital experiences. We're looking for a strategic storyteller to lead narrative research and development across our Analytics product and proposition portfolio, someone who knows how to bring clarity to complexity and compose product messaging that not only informs but inspires. In this role, you'll shape and drive a unified approach that cuts across product silos and regional teams, ensuring every word ...
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        NEW
        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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        NEW
        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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        NEW
        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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        NEW
        At Burberry, we believe creativity opens spaces. Our purpose is to unlock the power of imagination to push boundaries and open new possibilities for our people, our customers and our communities. This is the core belief that has guided Burberry since it was founded in 1856 and is central to how we operate as a company today. We aim to provide an environment for creative minds from different backgrounds to thrive, bringing a wide range of skills and experiences to everything we do. As a purposeful, values-driven brand, we are committed to being a force for good in the world as well, creating the next generation of sustainable luxury for customers, driving industry change and championing our communities. The Principal Engineer will act as a technical thought partner and knowledge anchor for platform engineering across our Digital ecosystem.
        At Burberry, we believe creativity opens spaces. Our purpose is to unlock the power of imagination to push boundaries and open new possibilities for our people, our customers and our communities. This is the core belief that has guided Burberry since it was founded in 1856 and is central to how we operate as a company today. We aim to provide an environment for creative minds from different backgrounds to thrive, bringing a wide range of skills and experiences to everything we do. As a purposeful, values-driven brand, we are committed to being a force for good in the world as well, creating the next generation of sustainable luxury for customers, driving industry change and championing our communities. The Principal Engineer will act as a technical thought partner and knowledge anchor for platform engineering across our Digital ecosystem.
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        NEW
        Job Title: Social Media Technology Executive - Location: 1HQ - Type of contract: full-time, permanent - Diageo is the worlds leading premium drinks company, a business built on the principles and foundations laid by the giants of our industry. Arthur Guinness, Alexander Walker, and many other dedicated people that followed in their footsteps, cared deeply about the people and businesses they fostered, and the communities in which they operated. Today we stand on the shoulders of these giants and act with the same entrepreneurial spirit. We are a spirited company born of an incredible entrepreneurial legacy. The success of Guinness, Smirnoff, Johnnie Walker, Tanqueray, Baileys and many more brands led to the formation of our company in 1997. And we only thrive today because of the talent of our people to grow our brands, old and new, and keep them strong.
        Job Title: Social Media Technology Executive - Location: 1HQ - Type of contract: full-time, permanent - Diageo is the worlds leading premium drinks company, a business built on the principles and foundations laid by the giants of our industry. Arthur Guinness, Alexander Walker, and many other dedicated people that followed in their footsteps, cared deeply about the people and businesses they fostered, and the communities in which they operated. Today we stand on the shoulders of these giants and act with the same entrepreneurial spirit. We are a spirited company born of an incredible entrepreneurial legacy. The success of Guinness, Smirnoff, Johnnie Walker, Tanqueray, Baileys and many more brands led to the formation of our company in 1997. And we only thrive today because of the talent of our people to grow our brands, old and new, and keep them strong.
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        NEW
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
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        NEW
        Front End Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
        Front End Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience) We're looking for a skilled and motivated Front End Developer to help deliver modern, user-focused digital services for clients in the Defence sector. This is an exciting opportunity to join a multi-disciplinary team transforming the way Defence users interact with critical systems. You'll work closely with designers, UX specialists, back-end developers and stakeholders to bring ideas to life through intuitive and responsive interfaces. You'll be key to developing new applications, optimising performance, and shaping the digital journey from prototype through to production. * Building responsive, high-quality web applications and user interfaces using HTML, CSS and JavaScript
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        NEWPREMIUM
        Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
        Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
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        NEWPREMIUM

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        Frequently Asked Questions

        How many contract API jobs are there in Hertford?
        There are 80 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, Management, amongst many others.