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        55 API jobs in Hertford + 20 miles

        439 exact matches jobs are outside your preferred location

        Python Developer

        Xelix
        London
        £60,000 - £80,000 a year
        About us - At Xelix, we work with some of the worlds largest companies to automate and strengthen their financial controls. Our AI solutions redefine how Accounts Payable teams operate - moving from manual processes to automated, intelligent workflows. Xelix is a fast-paced scale-up - things move fast and expectations are high. We raised our Series B with Insight Partners in June 2025 and are expanding aggressively, whilst remaining profitable. We have over 100 talented people pulling together to achieve our goals. Everyone is trusted to take ownership, move fast and have a meaningful impact. We prioritise personal and professional growth, keep things fun & we love to celebrate a milestone together. In this role youll grow, be challenged and help shape the future of Xelix. If youre excited about building something special with us, wed love to hear from you. About the
        About us - At Xelix, we work with some of the worlds largest companies to automate and strengthen their financial controls. Our AI solutions redefine how Accounts Payable teams operate - moving from manual processes to automated, intelligent workflows. Xelix is a fast-paced scale-up - things move fast and expectations are high. We raised our Series B with Insight Partners in June 2025 and are expanding aggressively, whilst remaining profitable. We have over 100 talented people pulling together to achieve our goals. Everyone is trusted to take ownership, move fast and have a meaningful impact. We prioritise personal and professional growth, keep things fun & we love to celebrate a milestone together. In this role youll grow, be challenged and help shape the future of Xelix. If youre excited about building something special with us, wed love to hear from you. About the
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        Summary - The Wikimedia Foundation is seeking a Senior Software Engineer to join the team supporting the Wikidata Platform the structured data backbone of Wikimedia projects and a key part of the global open knowledge ecosystem. You'll help scale and sustain the Wikidata Query Service (WDQS) and related platform services that power tools, features, communities, and research efforts across Wikimedia projects and beyond. This role combines backend engineering and operations ownership. You'll implement high-scale, production-grade services while ensuring performance, reliability, and maintainability. Working closely with the technical and product leads, you'll contribute to shaping the future of how the world queries and interacts with structured, linked data. Important : We are a fully remote team. Your working hours will need to overlap with UTC+1 to UTC-5 time zones t
        Summary - The Wikimedia Foundation is seeking a Senior Software Engineer to join the team supporting the Wikidata Platform the structured data backbone of Wikimedia projects and a key part of the global open knowledge ecosystem. You'll help scale and sustain the Wikidata Query Service (WDQS) and related platform services that power tools, features, communities, and research efforts across Wikimedia projects and beyond. This role combines backend engineering and operations ownership. You'll implement high-scale, production-grade services while ensuring performance, reliability, and maintainability. Working closely with the technical and product leads, you'll contribute to shaping the future of how the world queries and interacts with structured, linked data. Important : We are a fully remote team. Your working hours will need to overlap with UTC+1 to UTC-5 time zones t
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        OrganOx is an innovative, fast-paced, global medical device company with a mission to save lives by making every donated organ count. We are a commercial stage organ technology company, spun out of the University of Oxford in 2008, committed to improving transplantation outcomes throughout the world. The companys first product, the OrganOx metra normothermic machine perfusion (NMP) system for liver transplantation, has been used to support more than 5,000 liver transplant operations globally. Position Summary - The Senior Full Stack Web Developer will be a key internal resource in the Digital department and will deliver on projects to build research tools and production solutions to dovetail with outsourced development teams while being an asset to the specialist design and development work conducted in-house.
        OrganOx is an innovative, fast-paced, global medical device company with a mission to save lives by making every donated organ count. We are a commercial stage organ technology company, spun out of the University of Oxford in 2008, committed to improving transplantation outcomes throughout the world. The companys first product, the OrganOx metra normothermic machine perfusion (NMP) system for liver transplantation, has been used to support more than 5,000 liver transplant operations globally. Position Summary - The Senior Full Stack Web Developer will be a key internal resource in the Digital department and will deliver on projects to build research tools and production solutions to dovetail with outsourced development teams while being an asset to the specialist design and development work conducted in-house.
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        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. As a Agile Business Analyst Consultant, you will be joining the growing and exciting Digital Excellence community who are continually sharing knowledge and expertise. We are all passionate about user-centred design, critical thinking, problem solving and designing and building digital services and products. Working at Capgemini Invent would give you opportunities to develop and grow, working with major clients in both p
        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. As a Agile Business Analyst Consultant, you will be joining the growing and exciting Digital Excellence community who are continually sharing knowledge and expertise. We are all passionate about user-centred design, critical thinking, problem solving and designing and building digital services and products. Working at Capgemini Invent would give you opportunities to develop and grow, working with major clients in both p
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        Job Description - Purpose of the role - To develop, implement and maintain solutions that support the safeguarding of the banks systems and sensitive information. Accountabilities * Provision of subject matter expertise on security systems and engineering patterns. * Development and implementation of protocols, algorithms, and software applications to protect sensitive data and systems. * Management and protection of secrets, ensuring that they are securely generated, stored, and used. * Execution of audits to monitor, identify and assess vulnerabilities in the banks infrastructure/software and support the response to potential security breaches. * Identification of advancements in to support the innovation and adoption of new cryptographic technologies and techniques. * Collaboration across the bank, including developers and security teams, to ensure that cryptograph
        Job Description - Purpose of the role - To develop, implement and maintain solutions that support the safeguarding of the banks systems and sensitive information. Accountabilities * Provision of subject matter expertise on security systems and engineering patterns. * Development and implementation of protocols, algorithms, and software applications to protect sensitive data and systems. * Management and protection of secrets, ensuring that they are securely generated, stored, and used. * Execution of audits to monitor, identify and assess vulnerabilities in the banks infrastructure/software and support the response to potential security breaches. * Identification of advancements in to support the innovation and adoption of new cryptographic technologies and techniques. * Collaboration across the bank, including developers and security teams, to ensure that cryptograph
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        Software Engineer

        Gigaclear Ltd
        Abingdon, Oxfordshire
        £45,000 - £55,000 a year
        A Full Stack Software Engineering role. A role that will build your technical capabilities, providing a foundation for growth into more senior technical leadership roles. The Software Engineer is a hands-on contributor responsible for delivering secure, maintainable, and performant software as part of a cross-functional Agile team. Working closely with Product, QA, DevOps, and fellow engineers, this role helps shape technical solutions and contributes to quality practices. Essential Skills & Experience * Strong Python Development Capability 3 years+ * Experienced with front-end frameworks (React.js and Next.js) * Experience with TypeScript * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Experience with responsive web design * Understanding of SEO strategies and security standards
        A Full Stack Software Engineering role. A role that will build your technical capabilities, providing a foundation for growth into more senior technical leadership roles. The Software Engineer is a hands-on contributor responsible for delivering secure, maintainable, and performant software as part of a cross-functional Agile team. Working closely with Product, QA, DevOps, and fellow engineers, this role helps shape technical solutions and contributes to quality practices. Essential Skills & Experience * Strong Python Development Capability 3 years+ * Experienced with front-end frameworks (React.js and Next.js) * Experience with TypeScript * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Experience with responsive web design * Understanding of SEO strategies and security standards
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        Senior Software Engineer

        Gigaclear Ltd
        Abingdon, Oxfordshire
        £55,000 - £60,000 a year
        A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
        A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
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        As a Web Experience Designer & Payload Developer, you will play a key role in shaping and building the next generation of our content-driven web experiences. You will be responsible for designing reusable templates, implementing them within Payload CMS, and creating modular components and widgets that allow our teams to scale content production efficiently. This hybrid role combines design sensibility with hands-on front-end development and CMS integration, ensuring our digital properties are both visually engaging and technically robust. Responsibilities * Design and deliver reusable page templates (e.g., product landing pages) that are brand-consistent and scalable. * Create designs in Figma for review. * Build and configure these templates in Payload CMS, ensuring editors can easily manage and repurpose them.
        As a Web Experience Designer & Payload Developer, you will play a key role in shaping and building the next generation of our content-driven web experiences. You will be responsible for designing reusable templates, implementing them within Payload CMS, and creating modular components and widgets that allow our teams to scale content production efficiently. This hybrid role combines design sensibility with hands-on front-end development and CMS integration, ensuring our digital properties are both visually engaging and technically robust. Responsibilities * Design and deliver reusable page templates (e.g., product landing pages) that are brand-consistent and scalable. * Create designs in Figma for review. * Build and configure these templates in Payload CMS, ensuring editors can easily manage and repurpose them.
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        6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
        6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
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        Deep knowledge of enterprise architecture patterns, public cloud services (Azure, AWS), application design, integration patterns (API, event-driven), and data platforms.
        Deep knowledge of enterprise architecture patterns, public cloud services (Azure, AWS), application design, integration patterns (API, event-driven), and data platforms.
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        Familiarity with API testing and integration diagnostics
        Familiarity with API testing and integration diagnostics
        NEW
        You will lead four teams: Platform Engineering (cloud, data platforms, developer tooling), Backstage (internal developer portal), API Developer Portal (external partner integrations), and QA Engineering (central QA strategy). What youll be doing In this role, you will provide strategic leadership for our Platform Engineering, Backstage, API Developer Portal, and QA Engineering teams, setting the vision and direction while aligning emerging industry trends with business priorities across IAG Loyalty and BA Holidays.
        You will lead four teams: Platform Engineering (cloud, data platforms, developer tooling), Backstage (internal developer portal), API Developer Portal (external partner integrations), and QA Engineering (central QA strategy). What youll be doing In this role, you will provide strategic leadership for our Platform Engineering, Backstage, API Developer Portal, and QA Engineering teams, setting the vision and direction while aligning emerging industry trends with business priorities across IAG Loyalty and BA Holidays.
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        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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        NEW
        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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        NEW
        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
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        Frequently Asked Questions

        How many API jobs are there in Hertford?
        There are 55 API jobs within 20 miles of Hertford available on CWJobs right now.

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