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        149 API jobs in Hertfordshire + 20 miles

        Full Stack Developers (AI/ML integration)

        AMS CWS
        Mayfair, W1B 3BN
        Unspecified
        AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.
        AMS is a global workforce solutions partner committed to creating inclusive, dynamic, and future-ready workplaces. We help organisations adapt, grow, and thrive in an ever-evolving world by building, shaping, and optimising diverse talent strategies. Our Contingent Workforce Solutions (CWS) is one of our service offerings. Acting as an extension of their recruitment teams, we connect them with skilled interim and temporary professionals, fostering workplaces where everyone can contribute and succeed. Our client, a major UK retail bank, provides every day banking services to over 17 million retail customers. The banks expertise and services span across Business Services, Corporate banking, Wealth Management, Group Functions, Retail and Investment Banking.
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        NEWFEATURED

        Axway API Developer

        Randstad Digital
        EC1, City of London
        £500 - £650 per day
        6 months contract Inside IR35?? £500 to £650 a day?? Remote Working (UK based) *Active SC Clearance is needed* A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. You will contribute to a large government gateway project, and active SC clearance is required. The main focus of this role is to design and develop Axway policies while maintaining automated testing and code deployment. You will also be responsible for liaising with stakeholders to define requirements and design comprehensive solutions. * Axway's core products: Policy Studio, API Gateway, and API Manager. * Key communication protocols: SFTP, HTTPS, SSL/TLS, and oAuth. * Data and messaging formats: JSON, XML, SOAP, and REST. * Linux scripting and environments. * Using DevOps toolsets to automate testing and deployments.
        6 months contract Inside IR35?? £500 to £650 a day?? Remote Working (UK based) *Active SC Clearance is needed* A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. You will contribute to a large government gateway project, and active SC clearance is required. The main focus of this role is to design and develop Axway policies while maintaining automated testing and code deployment. You will also be responsible for liaising with stakeholders to define requirements and design comprehensive solutions. * Axway's core products: Policy Studio, API Gateway, and API Manager. * Key communication protocols: SFTP, HTTPS, SSL/TLS, and oAuth. * Data and messaging formats: JSON, XML, SOAP, and REST. * Linux scripting and environments. * Using DevOps toolsets to automate testing and deployments.
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        NEWFEATURED
        Job Title: Senior Developer Location:Osterley, UK (Hybrid) Duration: 6 months-Extendable * Architect, develop, and maintain scalable TypeScript/Node.js services and GraphQL APIs. * Write resilient, maintainable code with a strong focus on automated testing (unit, integration, functional, end-to-end, visual regression, Lighthouse). * Collaborate on DevOps practices: CI/CD (Jenkins, Concourse), containerisation, Helm chart authoring, and Kubernetes deployments. * Work within a cross-functional Agile team, contributing to technical direction, code reviews, and process improvements. * Ensure code is performant, secure, observable, and aligned with best practices. * Mentor and support junior developers, fostering a culture of technical excellence. * Extensive experience with TypeScript and Node.js in production environments.
        Job Title: Senior Developer Location:Osterley, UK (Hybrid) Duration: 6 months-Extendable * Architect, develop, and maintain scalable TypeScript/Node.js services and GraphQL APIs. * Write resilient, maintainable code with a strong focus on automated testing (unit, integration, functional, end-to-end, visual regression, Lighthouse). * Collaborate on DevOps practices: CI/CD (Jenkins, Concourse), containerisation, Helm chart authoring, and Kubernetes deployments. * Work within a cross-functional Agile team, contributing to technical direction, code reviews, and process improvements. * Ensure code is performant, secure, observable, and aligned with best practices. * Mentor and support junior developers, fostering a culture of technical excellence. * Extensive experience with TypeScript and Node.js in production environments.
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        NEW

        Student Systems Developer

        London School of Science & Technology Ltd T/a LSST
        Park Royal, W3 0XA
        Unspecified
        The London School of Science & Technology (LSST) is one of UKs leading, largest and fastest growing independent higher education provider with over 8000 students, 6 campuses and 3 university partnerships. The team behind LSST is passionately committed to transforming lives by providing excellent education. We believe no matter what your background, your age or personal circumstances everyone is entitled to access a good education. We have one of the highest National Student Survey scores of 96.7%, placing us in the top 15 in the UK. We are currently seeking to appoint a Student System Developer to support existing and new programmes.
        The London School of Science & Technology (LSST) is one of UKs leading, largest and fastest growing independent higher education provider with over 8000 students, 6 campuses and 3 university partnerships. The team behind LSST is passionately committed to transforming lives by providing excellent education. We believe no matter what your background, your age or personal circumstances everyone is entitled to access a good education. We have one of the highest National Student Survey scores of 96.7%, placing us in the top 15 in the UK. We are currently seeking to appoint a Student System Developer to support existing and new programmes.
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        NEW
        Fully Remote - UK 3 Month Contract Rate: £450 - £500 (Inside IR35) We are looking to recruit a Golang Backend Developer for a global software organisation on an initial 3 month contract. This is an excellent opportunity to contribute to high-performance backend systems in a collaborative environment and make a tangible impact on scalable, secure products. * Write clean, maintainable, and high-quality Go code following best practices. * Design, develop, and maintain large-scale backend systems with a focus on performance, reliability, and scalability. * Build and maintain API-based interfaces, ensuring security and compliance with industry standards. * Collaborate with cross-functional teams to understand requirements and translate them into technical solutions. * Participate in code reviews, provide constructive feedback, and help raise engineering standards.
        Fully Remote - UK 3 Month Contract Rate: £450 - £500 (Inside IR35) We are looking to recruit a Golang Backend Developer for a global software organisation on an initial 3 month contract. This is an excellent opportunity to contribute to high-performance backend systems in a collaborative environment and make a tangible impact on scalable, secure products. * Write clean, maintainable, and high-quality Go code following best practices. * Design, develop, and maintain large-scale backend systems with a focus on performance, reliability, and scalability. * Build and maintain API-based interfaces, ensuring security and compliance with industry standards. * Collaborate with cross-functional teams to understand requirements and translate them into technical solutions. * Participate in code reviews, provide constructive feedback, and help raise engineering standards.
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        Back End Integration Engineer

        I3 Resourcing Limited
        The City, EC3V 3ND
        £70000 - £80000 per annum + + BENS + BONUS
        London (Hybrid) | ?? Full-time | ?? Permanent | ?? Competitive + Excellent Benefits Reports To: Data Engineering Manager?? Join us on Our Digital Transformation Journey! We're building a cutting-edge suite of automation and data services to power the next phase of growth in the insurance market. Now, we're on the hunt for a passionate and highly skilled Back End Integration Engineer to help us reimagine how our business operates. If you're a creative problem solver, excited by innovative technologies, and experienced in integration and automation within a cloud environment - we want to hear from you. What You'll Be Doing You'll be part of our growing Data and Engineering team, working on exciting, high-impact projects across the entire business.
        London (Hybrid) | ?? Full-time | ?? Permanent | ?? Competitive + Excellent Benefits Reports To: Data Engineering Manager?? Join us on Our Digital Transformation Journey! We're building a cutting-edge suite of automation and data services to power the next phase of growth in the insurance market. Now, we're on the hunt for a passionate and highly skilled Back End Integration Engineer to help us reimagine how our business operates. If you're a creative problem solver, excited by innovative technologies, and experienced in integration and automation within a cloud environment - we want to hear from you. What You'll Be Doing You'll be part of our growing Data and Engineering team, working on exciting, high-impact projects across the entire business.
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        Non-Functional Testing Engineer

        McGregor Boyall Associates Limited
        E1, East London
        £75000 - £850000 per annum + + Additional Benefits
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy.
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy.
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        NEW

        Principal Consultant

        Infoplus Technologies UK Ltd
        E11, East London
        From £550 to £650 per day
        Role :Principal Consultant (Planning Lead) Work mode: Remote Travel: Should be ready to travel to Netherlands as required (this will be required as needed, e.g. for CRP sessions etc . Apart from this role is remote in UK). Contract duration: 6 months Location: UK We are seeking a seasonedFunctional Leadto drive the implementation ofOracle Fusion Cloud Planning modulesincludingSupply Planning and Demand Planning, GOP and S&OP. The ideal candidate will have deep domain expertise in theCPG industry, strong functional knowledge of Oracle Cloud Planning, and experience leading multi-country rollouts in Europe. Must have skills:?? 8+ years of experience in Oracle Planning modules, with 6+ years in Oracle Fusion Cloud. Proven track record in at least 3 full-cycle Oracle Cloud Planning implementations.
        Role :Principal Consultant (Planning Lead) Work mode: Remote Travel: Should be ready to travel to Netherlands as required (this will be required as needed, e.g. for CRP sessions etc . Apart from this role is remote in UK). Contract duration: 6 months Location: UK We are seeking a seasonedFunctional Leadto drive the implementation ofOracle Fusion Cloud Planning modulesincludingSupply Planning and Demand Planning, GOP and S&OP. The ideal candidate will have deep domain expertise in theCPG industry, strong functional knowledge of Oracle Cloud Planning, and experience leading multi-country rollouts in Europe. Must have skills:?? 8+ years of experience in Oracle Planning modules, with 6+ years in Oracle Fusion Cloud. Proven track record in at least 3 full-cycle Oracle Cloud Planning implementations.
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        NEW
        *inside IR35 - umbrella* * Hardworking, dedicated, detail oriented, focused on quality and a team player, with effective verbal and written communications. * 7+ years of hands-on coding in server side Java with strong emphasis on Concurrency, Collections API, Messaging and Event processing across multiple streams * 5+ years of coding experience in multi-cast messaging (Solace / RV) * 5+ years of coding with relational DB (SQL Server, Sybase, Oracle) * 5+ years of technical design of low latency trading application services * 3+ years of build tools (Maven, Jenkins, Nexus) * Coding with FIX protocol, ION API is a strong plus
        *inside IR35 - umbrella* * Hardworking, dedicated, detail oriented, focused on quality and a team player, with effective verbal and written communications. * 7+ years of hands-on coding in server side Java with strong emphasis on Concurrency, Collections API, Messaging and Event processing across multiple streams * 5+ years of coding experience in multi-cast messaging (Solace / RV) * 5+ years of coding with relational DB (SQL Server, Sybase, Oracle) * 5+ years of technical design of low latency trading application services * 3+ years of build tools (Maven, Jenkins, Nexus) * Coding with FIX protocol, ION API is a strong plus
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        *inside IR35 - umbrella* * Hardworking, dedicated, detail oriented, focused on quality and a team player, with effective verbal and written communications. * 7+ years of hands-on coding in server side Java with strong emphasis on Concurrency, Collections API, Messaging and Event processing across multiple streams * 5+ years of coding experience in multi-cast messaging (Solace / RV) * 5+ years of coding with relational DB (SQL Server, Sybase, Oracle) * 5+ years of technical design of low latency trading application services * 3+ years of build tools (Maven, Jenkins, Nexus) * Coding with FIX protocol, ION API is a strong plus
        *inside IR35 - umbrella* * Hardworking, dedicated, detail oriented, focused on quality and a team player, with effective verbal and written communications. * 7+ years of hands-on coding in server side Java with strong emphasis on Concurrency, Collections API, Messaging and Event processing across multiple streams * 5+ years of coding experience in multi-cast messaging (Solace / RV) * 5+ years of coding with relational DB (SQL Server, Sybase, Oracle) * 5+ years of technical design of low latency trading application services * 3+ years of build tools (Maven, Jenkins, Nexus) * Coding with FIX protocol, ION API is a strong plus
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        Software Developer

        Nextech Group Limited
        MK1, Milton Keynes
        £45000 - £50000 per annum
        Senior Software Engineer Salary: up to £50k Location: Buckinghamshire My client, an innovative leader in the technology space, is seeking a Senior Software Engineer to drive the development of next-generation Windows desktop applications. This role blends desktop engineering, networking, and real-time data integration, offering the chance to work on truly cutting-edge projects. Key Responsibilities * Build and enhance Electron-based desktop applications * Integrate IP cameras via TCP/IP protocols * Develop mapping and geolocation features * Optimize and extend Node.js applications * Implement API integrations with external services * Collaborate using modern Git workflows * Contribute across the full technology stack What We're Looking For * 5+ years software development experience * 3+ years hands-on with Electron * Strong expertise in TCP/IP networking
        Senior Software Engineer Salary: up to £50k Location: Buckinghamshire My client, an innovative leader in the technology space, is seeking a Senior Software Engineer to drive the development of next-generation Windows desktop applications. This role blends desktop engineering, networking, and real-time data integration, offering the chance to work on truly cutting-edge projects. Key Responsibilities * Build and enhance Electron-based desktop applications * Integrate IP cameras via TCP/IP protocols * Develop mapping and geolocation features * Optimize and extend Node.js applications * Implement API integrations with external services * Collaborate using modern Git workflows * Contribute across the full technology stack What We're Looking For * 5+ years software development experience * 3+ years hands-on with Electron * Strong expertise in TCP/IP networking
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        Senior React Developer / Front End Engineer (React TypeScript Data Visualisation) London to £80k Are you a skilled Software Developer with strong React and Data Visualisation skills combined with a good appreciation of financial markets and technology? You could be joining a growing, global, Fintech services company that has seen 30-40% year on year growth for the past 10 years and has ambitious growth plans. As a Senior React Developer you'll design and develop new features and enhancements to the front end of the platform with a focus on real-time data visualisation on business critical systems using React. You'll collaborate with backend engineers to build complex financial products. You'll join the team in Central London three days a week with flexibility to work from home the other two days.
        Senior React Developer / Front End Engineer (React TypeScript Data Visualisation) London to £80k Are you a skilled Software Developer with strong React and Data Visualisation skills combined with a good appreciation of financial markets and technology? You could be joining a growing, global, Fintech services company that has seen 30-40% year on year growth for the past 10 years and has ambitious growth plans. As a Senior React Developer you'll design and develop new features and enhancements to the front end of the platform with a focus on real-time data visualisation on business critical systems using React. You'll collaborate with backend engineers to build complex financial products. You'll join the team in Central London three days a week with flexibility to work from home the other two days.
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        NEWPREMIUM

        Lead Applied AI Engineer

        SUMMER-BROWNING ASSOCIATES LIMITED
        E1, East London
        £700 - £750 per day
        Summer-Browning Associates are currently supporting our Central Government client, who are seeking a Lead Applied AI Engineer on an initial 6 month assignment. Location: London, Bristol or Manchester (hybrid - must be able to travel to London for key meetings) You will be responsible for leading the design and establishment of frameworks, tools and processes to responsibly develop, deploy and monitor AI products. * Proficient experience in Python * Strong software engineering skills with a focus on building production-ready systems * Experience of deploying & monitoring such systems in a cloud environment. * Experience with natural language processing, deep learning and generative AI. * Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers). * Building AI agents, or products that rely on AI agents
        Summer-Browning Associates are currently supporting our Central Government client, who are seeking a Lead Applied AI Engineer on an initial 6 month assignment. Location: London, Bristol or Manchester (hybrid - must be able to travel to London for key meetings) You will be responsible for leading the design and establishment of frameworks, tools and processes to responsibly develop, deploy and monitor AI products. * Proficient experience in Python * Strong software engineering skills with a focus on building production-ready systems * Experience of deploying & monitoring such systems in a cloud environment. * Experience with natural language processing, deep learning and generative AI. * Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers). * Building AI agents, or products that rely on AI agents
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        Senior IOS Developer

        Norton Blake
        City of London, London
        £500 - £550 per day
        As a Manager Mobile Solutions, you will play a key role in delivering award winning, interactive experiences to our clients. You will drive the translation and construction of clients' business problems into innovative technology solutions by creating and owning the technical vision of a project to ensure that the vision is achieved with a high level of quality. You will be responsible for solution design and architecture delivery- providing technical direction to teams and implementing architectural strategy. You will elaborate design options, encourage innovation, drive technical strategy and ensure that solutions meet functional and non-functional requirements. You will contribute to delivery capability by educating and mentoring developers, using a variety of design techniques and ensuring that good design practices are followed. PRIMARY RESPONSIBILITIES?
        As a Manager Mobile Solutions, you will play a key role in delivering award winning, interactive experiences to our clients. You will drive the translation and construction of clients' business problems into innovative technology solutions by creating and owning the technical vision of a project to ensure that the vision is achieved with a high level of quality. You will be responsible for solution design and architecture delivery- providing technical direction to teams and implementing architectural strategy. You will elaborate design options, encourage innovation, drive technical strategy and ensure that solutions meet functional and non-functional requirements. You will contribute to delivery capability by educating and mentoring developers, using a variety of design techniques and ensuring that good design practices are followed. PRIMARY RESPONSIBILITIES?
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        Data Strategy Lead Reinsurance City of London

        IPS Group
        City of London, London
        £120,000-£150,000 per annum plus benefits
        Location: City of London, Hybrid Salary: £120,000-£150,000 Industry: Insurance/Reinsurance Tenure: Permanent Our Client An international financial services organisation is looking for a hands-on data leader to shape and drive its data strategy across multiple global regions. The role is based in London and will focus on strengthening adoption of enterprise-wide data platforms, improving analytics capability, and unlocking value from diverse and complex datasets. This position will support a wide variety of business areas and requires close collaboration with colleagues across the UK, Europe, Asia Pacific, Latin America, the Middle East, and Africa. Key Responsibilities * Provide leadership and direction to embedded data specialists, helping them deliver solutions aligned to business needs. * Lead the rollout and ongoing enhancement of core data products and platforms.
        Location: City of London, Hybrid Salary: £120,000-£150,000 Industry: Insurance/Reinsurance Tenure: Permanent Our Client An international financial services organisation is looking for a hands-on data leader to shape and drive its data strategy across multiple global regions. The role is based in London and will focus on strengthening adoption of enterprise-wide data platforms, improving analytics capability, and unlocking value from diverse and complex datasets. This position will support a wide variety of business areas and requires close collaboration with colleagues across the UK, Europe, Asia Pacific, Latin America, the Middle East, and Africa. Key Responsibilities * Provide leadership and direction to embedded data specialists, helping them deliver solutions aligned to business needs. * Lead the rollout and ongoing enhancement of core data products and platforms.
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        Fully Remote - UK 3 Month Contract Rate: £450 - £500 per day (Inside IR35) We are looking to recruit a Senior Front End Developer for a global software organisation on an initial 3 month contract. This is an excellent opportunity to work hands-on with modern frontend technologies, shape the user experience, and mentor junior developers. * Hands-on development of new functionality, building the frontend and integrating with APIs. * Modify and modernise existing functionality to improve performance and usability. * Apply best practices to deliver high-quality, secure, and performant solutions. * Build reusable components and collaborate closely with teams across the business. * Work with product managers, UX/UI designers, and stakeholders to gather requirements and propose effective solutions.
        Fully Remote - UK 3 Month Contract Rate: £450 - £500 per day (Inside IR35) We are looking to recruit a Senior Front End Developer for a global software organisation on an initial 3 month contract. This is an excellent opportunity to work hands-on with modern frontend technologies, shape the user experience, and mentor junior developers. * Hands-on development of new functionality, building the frontend and integrating with APIs. * Modify and modernise existing functionality to improve performance and usability. * Apply best practices to deliver high-quality, secure, and performant solutions. * Build reusable components and collaborate closely with teams across the business. * Work with product managers, UX/UI designers, and stakeholders to gather requirements and propose effective solutions.
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        Software Engineer Java AWS React - Start-up

        Client Server
        EC2A, City of London
        £90000 - £110000 per annum + equity + benefits
        Software Engineer / Developer (Java AWS React) London / WFH to £110k Are you a technologist looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Software Engineer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
        Software Engineer / Developer (Java AWS React) London / WFH to £110k Are you a technologist looking for an opportunity to be part of something big from the start? You could be progressing your career in an impactful role at a newly established Fintech start-up, set up by a small team of finance and technology entrepreneurs with a hugely successful track record. As a Software Engineer you will join a small team to build systems from the ground up, working across the full technology stack with a focus on designing, developing and deploying cloud-native microservices that form the core of the platform. You'll collaborate closely with the Lead Engineer, Architect and Product Manager to shape system design, APIs and data models to enable scalable backend logic and clean UI.
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        NEWPREMIUM
        Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. Were building a more open world. Join us. Introduction to team
        Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. Were building a more open world. Join us. Introduction to team
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        NEW

        Software Developer

        Oscar Associates (UK) Limited
        EC1, City of London
        £30000 - £45000 per annum
        We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
        We are delighted to be partnering with a successful technology consultancy that is expanding its Software Development team. This is an excellent opportunity for a proactive and committed Software Developer with expertise in .NET (C# / ASP.NET), modern JavaScript frameworks, and SQL to contribute to impactful projects across a diverse client base. About the role As a Software Developer, you will be working on the development, and maintenance of their internal software product, ensuring seamless integrations into their clients systems. You'll also get involved with external projects, collaborating closely with clients to understand their needs, and design effective solutions. This role blends hands-on technical work with client interaction, giving you the chance to make a visible impact. Key Responsibilities
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        FEATURED

        Head of New Product Delivery (Insurance) *12 month FTC*

        Saga Group Limited
        North London, London, N1 4AC
        £70,000 - £90,000 dependent on experience + car allowance
        Head of New Product Delivery (Insurance) £70,000 - £90,000 dependent on experience + car allowance 12 month secondment Hybrid London/Folkestone At Saga, were not just a business were a trusted brand, built on care, understanding, and delivering the very best for our customers. At Saga we are driving forward in our vision to continue to provide our experience customers with best-in-class insurance products that support their individual needs. In this newly created role, youll join us as Head of Product Development to lead the development of new insurance products. Reporting to the Chief Commercial Officer, you will own the new product delivery agenda, manage the backlog, and drive delivery - working closely with internal teams and partners to launch customer-focused, compliant, and commercially successful products.
        Head of New Product Delivery (Insurance) £70,000 - £90,000 dependent on experience + car allowance 12 month secondment Hybrid London/Folkestone At Saga, were not just a business were a trusted brand, built on care, understanding, and delivering the very best for our customers. At Saga we are driving forward in our vision to continue to provide our experience customers with best-in-class insurance products that support their individual needs. In this newly created role, youll join us as Head of Product Development to lead the development of new insurance products. Reporting to the Chief Commercial Officer, you will own the new product delivery agenda, manage the backlog, and drive delivery - working closely with internal teams and partners to launch customer-focused, compliant, and commercially successful products.
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        NEWFEATURED
        ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
        ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
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        NEWFEATURED

        IT Operations PM

        Randstad Digital
        EC1, City of London
        £650 - £700 per day
        IT Operations Project Manager 6 Months Contract Outside IR35 £650 to £700 a day Remote - Occasional travel to Paddington A large manufacturing company is urgently seeking an Operations project manager with a background working in procurement savings. This role is ideal for a professional with a strong background in manufacturing operations and data-led applications. As a project manager you will need to have the following skills * Project Management experience * Data Platform and Analytics * Application Development and Interfacing * Be familiar with AI and API interfacing as part of the pilot project. * Manufacturing Operations * Procurement & Cost Savings * Leadership & Teamwork 6 Months Contract Outside IR35 | £650 to £700 a day | Remote - Occasional travel to Paddington
        IT Operations Project Manager 6 Months Contract Outside IR35 £650 to £700 a day Remote - Occasional travel to Paddington A large manufacturing company is urgently seeking an Operations project manager with a background working in procurement savings. This role is ideal for a professional with a strong background in manufacturing operations and data-led applications. As a project manager you will need to have the following skills * Project Management experience * Data Platform and Analytics * Application Development and Interfacing * Be familiar with AI and API interfacing as part of the pilot project. * Manufacturing Operations * Procurement & Cost Savings * Leadership & Teamwork 6 Months Contract Outside IR35 | £650 to £700 a day | Remote - Occasional travel to Paddington
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        NEWFEATURED
        Technical Architect - Genesys Cloud - 6 Months - Inside IR35 I am urgently looking to recruit a Technical Architect with Genesys Cloud Experience. The Techincal Architect will have good solid experience of having work on Genesys Clould projects. The Technical Architect will have experience in; - Genesys Cloud - Genesys Engage - AI/Ml - API Integration - Java/Pyton Experience Randstad Technologies is acting as an Employment Business in relation to this vacancy.
        Technical Architect - Genesys Cloud - 6 Months - Inside IR35 I am urgently looking to recruit a Technical Architect with Genesys Cloud Experience. The Techincal Architect will have good solid experience of having work on Genesys Clould projects. The Technical Architect will have experience in; - Genesys Cloud - Genesys Engage - AI/Ml - API Integration - Java/Pyton Experience Randstad Technologies is acting as an Employment Business in relation to this vacancy.
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        NEWFEATURED

        Business Systems Architect

        Corecruitment International
        N1, North London
        £60k - 65k per year + benefits
        We’re looking for a technically skilled, solutions-focused individual to run an entire technical operation solo. This is a highly autonomous role, perfect for someone who thrives on building, managing, and continuously improving the systems that keep a fast-moving business running smoothly. From data pipelines to automation workflows, you will ensure every technical aspect of the business operates efficiently and strategically. * Own all technology systems and processes across the business. * Design, build, and maintain data pipelines integrating POS, kitchen operations, labor, and inventory systems. * Develop and manage dashboards and reporting tools for leadership and operations. * Build and maintain low/no-code automation workflows to streamline operations. * Manage API integrations between platforms.
        We’re looking for a technically skilled, solutions-focused individual to run an entire technical operation solo. This is a highly autonomous role, perfect for someone who thrives on building, managing, and continuously improving the systems that keep a fast-moving business running smoothly. From data pipelines to automation workflows, you will ensure every technical aspect of the business operates efficiently and strategically. * Own all technology systems and processes across the business. * Design, build, and maintain data pipelines integrating POS, kitchen operations, labor, and inventory systems. * Develop and manage dashboards and reporting tools for leadership and operations. * Build and maintain low/no-code automation workflows to streamline operations. * Manage API integrations between platforms.
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        FEATURED
        Title: Laboratory Systems Specialist Location: Slough Visa and Relocation support is offered with this role. Today, Lonza is a global leader in life sciences operating across five continents. While we work in science, theres no magic formula to how we do it. Our greatest scientific solution is talented people working together, devising ideas that help businesses to help people. In exchange, we let our people own their careers. Their ideas, big and small, genuinely improve the world. And thats the kind of work we want to be part of. The role of a Laboratory Systems Specialist is to lead the development and implementation of robust Lab/digital infrastructure within our R&D laboratories for the UK and US locations.
        Title: Laboratory Systems Specialist Location: Slough Visa and Relocation support is offered with this role. Today, Lonza is a global leader in life sciences operating across five continents. While we work in science, theres no magic formula to how we do it. Our greatest scientific solution is talented people working together, devising ideas that help businesses to help people. In exchange, we let our people own their careers. Their ideas, big and small, genuinely improve the world. And thats the kind of work we want to be part of. The role of a Laboratory Systems Specialist is to lead the development and implementation of robust Lab/digital infrastructure within our R&D laboratories for the UK and US locations.
        more
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        What is the average salary for API in Hertfordshire?

        Average salary per year
        £62,499

        The average salary for a API in Hertfordshire is £62,499. API in Hertfordshire salaries range from £47,499 to £67,499.

        Frequently Asked Questions

        How many API jobs are there in Hertfordshire?
        There are 149 API jobs within 20 miles of Hertfordshire available on Jobsite right now.

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

        How many temporary and part-time API jobs are available in Hertfordshire?
        There are 4 temporary API jobs and 9 part-time API jobs available in Hertfordshire at the moment.