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        • Hertfordshire

        35 Permanent API jobs in Hertford + 20 miles

        212 exact matches jobs are outside your preferred location

        QA Engineer

        Becrypt
        London
        Unspecified
        Good understanding of API testing * Basic understanding of API automation using python
        Good understanding of API testing * Basic understanding of API automation using python
        NEW
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
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        NEW

        Senior Solution Architect

        UK Health Security Agency
        Canary Wharf, E14 4PU
        From £54,416 to £68,344 per annum
        The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health * Analyse: use world-class science and data analytics to assess and continually monitor threats
        The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health * Analyse: use world-class science and data analytics to assess and continually monitor threats
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        NEW

        Lead .Net Software Developer

        Hireful
        Milton Keynes, Buckinghamshire
        £65k - £75k base + Bonus
        Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
        Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
        more
        NEWFEATURED
        Deliver front-end excellence: Build fast, responsive web apps using Vite, React Query, Context API, and CSS frameworks. * Design for scale: Lead on API design, performance optimisation, and secure, cloud-ready architectures.
        Deliver front-end excellence: Build fast, responsive web apps using Vite, React Query, Context API, and CSS frameworks. * Design for scale: Lead on API design, performance optimisation, and secure, cloud-ready architectures.
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        NEW

        IT Project Engineer

        Networking People (UK) Limited
        London
        £50000 - £70000 per annum + + benefits
        Advanced automation experience using PowerShell, Graph API, or Azure Automation for large-scale management and orchestration.
        Advanced automation experience using PowerShell, Graph API, or Azure Automation for large-scale management and orchestration.
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        NEW

        Solution Architect

        Stackstudio Digital Ltd.
        SL4, Windsor
        From £525 to £550 per day
        Job Title: Solution Architect - Location: Windsor, UK - Work Model: Hybrid (1 day per week in office) Job Type: Contract (Inside IR35) Duration: 6 Months - We are seeking an experienced Solution Architect to join our team in Windsor. You will play a key role in defining, communicating, and implementing strategic technology standards and roadmaps, ensuring robust and scalable solutions for business transformation initiatives. This is a hybrid role requiring one day per week in the office. * Identify, publish, and communicate strategic technology standards, frameworks, principles, and roadmaps to guide technology decisions and leverage efficiency opportunities. * Analyze the impact of implementing new technologies into the IT infrastructure. * Assist Solution Architects, Product Specialists, and Project Managers in matching technology services to specific business servi
        Job Title: Solution Architect - Location: Windsor, UK - Work Model: Hybrid (1 day per week in office) Job Type: Contract (Inside IR35) Duration: 6 Months - We are seeking an experienced Solution Architect to join our team in Windsor. You will play a key role in defining, communicating, and implementing strategic technology standards and roadmaps, ensuring robust and scalable solutions for business transformation initiatives. This is a hybrid role requiring one day per week in the office. * Identify, publish, and communicate strategic technology standards, frameworks, principles, and roadmaps to guide technology decisions and leverage efficiency opportunities. * Analyze the impact of implementing new technologies into the IT infrastructure. * Assist Solution Architects, Product Specialists, and Project Managers in matching technology services to specific business servi
        more
        NEW

        Global Claims, IT Solutions Leader

        MARSH CORPORATE SERVICES LIMITED
        The City, EC3R 5BU
        Discretionary Bonus, Pension Scheme & Private Healthcare
        Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
        Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
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        NEWPREMIUM

        Student Systems Developer

        London School of Science & Technology Ltd T/a LSST
        Park Royal, W3 0XA
        Unspecified
        Authentication & Integration Services API integrations, SSO (Single Sign-On), and system interoperability with University IT infrastructure.
        Authentication & Integration Services API integrations, SSO (Single Sign-On), and system interoperability with University IT infrastructure.
        more

        Senior Data Analyst

        SE Trains Ltd
        SE1, South East London, SE1 2AU
        £42,000 per annum
        Experience in working with and ingesting a variety of different data sources of different data types (e.g. JSON, CSV, API etc.)
        Experience in working with and ingesting a variety of different data sources of different data types (e.g. JSON, CSV, API etc.)
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        NEW
        A Developer with experience in .NET, C#, and JavaScript is urgently required to join a dynamic and innovative team in a leading organisation working on a fully remote basis. This is an excellent opportunity to contribute to technological developments, streamline processes, and enhance operational efficiency. The Role - As a Developer, you will work closely with the Senior Developer to design and implement internal tools and solutions. Collaborating with various departments, you’ll support development-related queries and build integrations with third-party platforms via APIs. This role is central to improving workflows, enabling innovative practices, and contributing to the company’s technology strategy. The Company - Our client is a forward-thinking organisation committed to technological advancement and efficiency.
        A Developer with experience in .NET, C#, and JavaScript is urgently required to join a dynamic and innovative team in a leading organisation working on a fully remote basis. This is an excellent opportunity to contribute to technological developments, streamline processes, and enhance operational efficiency. The Role - As a Developer, you will work closely with the Senior Developer to design and implement internal tools and solutions. Collaborating with various departments, you’ll support development-related queries and build integrations with third-party platforms via APIs. This role is central to improving workflows, enabling innovative practices, and contributing to the company’s technology strategy. The Company - Our client is a forward-thinking organisation committed to technological advancement and efficiency.
        more
        NEW

        Software Engineering Lead

        Dignity Funerals Limited
        Maidenhead Court, SL6 8LT
        Up to £110,000 per annum
        Contract: Full-Time, Permanent - Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum - At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
        Contract: Full-Time, Permanent - Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum - At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
        more
        FEATURED
        Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
        Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
        more
        NEW
        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
        more
        NEW

        Senior Java Software Engineer

        Run-Time Group Ltd
        SW19, South West London
        From £70,000 to £85,000 per annum
        Job Title: Mid-Senior Java Engineer - Location:London (Hybrid - 2-3 days in-office) Salary:Up to £85,000 per annum + Benefits - Sector:Financial Services - We are seeking aSenior-Level Java Engineerto join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. * Design, develop, and maintain high-quality Java-based applications for financial services. * Collaborate with cross-functional teams to deliver robust and scalable software solutions. * Ensure code quality, security, and performance standards are met.
        Job Title: Mid-Senior Java Engineer - Location:London (Hybrid - 2-3 days in-office) Salary:Up to £85,000 per annum + Benefits - Sector:Financial Services - We are seeking aSenior-Level Java Engineerto join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. * Design, develop, and maintain high-quality Java-based applications for financial services. * Collaborate with cross-functional teams to deliver robust and scalable software solutions. * Ensure code quality, security, and performance standards are met.
        more
        Contract Java Developer (Inside IR35) | SC Cleared - We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information * IR35 Status: Inside IR35 * Duration: 6-12 month initial contract * Location: Remote, with required travel to London once a month. * Security Clearance: You must hold an active SC Clearance. The Role - You will be a key member of a development team, responsible for designing and implementing high-performance back-end services. This role requires deep technical expertise and a proactive approach to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience
        Contract Java Developer (Inside IR35) | SC Cleared - We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information * IR35 Status: Inside IR35 * Duration: 6-12 month initial contract * Location: Remote, with required travel to London once a month. * Security Clearance: You must hold an active SC Clearance. The Role - You will be a key member of a development team, responsible for designing and implementing high-performance back-end services. This role requires deep technical expertise and a proactive approach to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience
        more
        FEATURED

        Senior Data Scientist / Engineer

        Serve Legal
        Pimlico, SW1
        From £60,000 to £75,000 per annum plus 10% company bonus scheme
        Reports to: Data Director / Executive Sponsor - Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent - Base Salary: £60,000 £75,000 dependent on location and experience + 10% bonus scheme - Why This Role Exists - Serve Legal is forging new ground: transforming operational data into market-ready products, algorithms, and insights that redefine client value. As a driver of our Innovation Labs, you will experiment, prototype, and build compelling data solutions in a startup-within-a-business environmentboldly iterating and owning proofs-of-concept that scale. This is a position with a balance between data science and engineering. Besides exploring and analysing datasets, you will help to establish a cloud native data foundations, with a data warehouse and supporting data pipelines.
        Reports to: Data Director / Executive Sponsor - Location: Remote with occasional travel to London (2 times a month) Contract: Full-time, permanent - Base Salary: £60,000 £75,000 dependent on location and experience + 10% bonus scheme - Why This Role Exists - Serve Legal is forging new ground: transforming operational data into market-ready products, algorithms, and insights that redefine client value. As a driver of our Innovation Labs, you will experiment, prototype, and build compelling data solutions in a startup-within-a-business environmentboldly iterating and owning proofs-of-concept that scale. This is a position with a balance between data science and engineering. Besides exploring and analysing datasets, you will help to establish a cloud native data foundations, with a data warehouse and supporting data pipelines.
        more
        NEW

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        Frequently Asked Questions

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

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