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        237 API jobs in London + 20 miles

        101 exact matches jobs are outside your preferred location

        WordPress Web Developer

        Above Digital
        Reading (RG1)
        £35K, Hybrid, Great Benefits
        At Above Digital, we craft exceptional digital experiences. Were a creative, fast-paced digital agency based in the heart of Reading designing and developing high-performance, user-centric websites and branding projects for everyone from cutting-edge London media agencies to bold start-ups. Were on the hunt for a Mid-weight Full Stack WordPress Developer with great front-end experience and who loves getting into the detail, thrives on clean code, and excels in bringing designs to life. * Work with a friendly, forward-thinking team in modern Reading offices (a short walk from the main station). * Hybrid flexibility mix of remote and in-office collaboration. * Exciting client portfolio across sectors from award-winning campaigns to innovative start-ups. * Competitive salary and the chance to grow your skills and influence within a rapidly evolving digital agency.
        At Above Digital, we craft exceptional digital experiences. Were a creative, fast-paced digital agency based in the heart of Reading designing and developing high-performance, user-centric websites and branding projects for everyone from cutting-edge London media agencies to bold start-ups. Were on the hunt for a Mid-weight Full Stack WordPress Developer with great front-end experience and who loves getting into the detail, thrives on clean code, and excels in bringing designs to life. * Work with a friendly, forward-thinking team in modern Reading offices (a short walk from the main station). * Hybrid flexibility mix of remote and in-office collaboration. * Exciting client portfolio across sectors from award-winning campaigns to innovative start-ups. * Competitive salary and the chance to grow your skills and influence within a rapidly evolving digital agency.
        more

        Senior Java Developer - AI Project

        Connexa
        Milton Keynes (MK1)
        £70000 - £80000 per annum + + 20% Bonus
        Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Senior Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
        Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Senior Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
        more

        Software Engineer - AI Innovation

        Connexa
        Milton Keynes (MK1)
        £50000 - £70000 per annum + 20% Bonus
        Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Full Stack Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
        Our client, a growing consultancy delivering cutting-edge AI and data-led services to government and public sector clients, is looking for a Full Stack Software Engineer to join their forward-thinking team in Milton Keynes. This is a fantastic opportunity to contribute to a nationally recognised AI innovation platform used to drive sensitive data discovery, redaction, and secure archiving for government departments. You'll work across a modern tech stack and play a key role in the development, deployment, and support of a secure full stack system used across the UK public sector. * Design, build, and test full stack software in a secure, client-focused environment * Work with modern front-end technologies (React, TypeScript, HTML/CSS) to deliver intuitive UI/UX * Develop robust back-end services using Java and Spring Boot
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        Software Engineer

        Constant Recruitment
        Burton End, Stansted (CM24), CM22
        Up to £50,000 per annum
        Location: Bishops Stortford - Salary: Up to £50k - Do you have two years software development experience? Do you have a strong foundation in C# development? Would you enjoy working on projects that involve data integrations, security systems, and enterprise-scale solutions? This role is ideal for someone with around 2 years experience, looking to build on their skills with mentoring from senior engineers. The Company - Our client is a fast-growing technology business that designs and delivers bespoke software solutions, data integrations, and consultancy services. Since their launch in 2020, they have built a strong reputation for developing custom integrations between third-party systems and access control/security platforms, supporting sectors including higher education, commercial real estate, healthcare, and defence.
        Location: Bishops Stortford - Salary: Up to £50k - Do you have two years software development experience? Do you have a strong foundation in C# development? Would you enjoy working on projects that involve data integrations, security systems, and enterprise-scale solutions? This role is ideal for someone with around 2 years experience, looking to build on their skills with mentoring from senior engineers. The Company - Our client is a fast-growing technology business that designs and delivers bespoke software solutions, data integrations, and consultancy services. Since their launch in 2020, they have built a strong reputation for developing custom integrations between third-party systems and access control/security platforms, supporting sectors including higher education, commercial real estate, healthcare, and defence.
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        NEWPREMIUM

        ServiceNow Architect

        Syntax Consultancy Limited
        Reading, Berkshire, RG1 1LZ
        500-525/day (Outside IR35)
        6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
        6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
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        NEW

        Pen Tester

        Stackstudio Digital Ltd.
        Reading (RG1)
        From £400 to £410 per day
        Role/Job Title:Pen Tester - Work Location: Reading (3days) The Role - We're looking for a Security Consultant / Senior Security Consultant with expertise in penetration testing. As part of our Cyber Security team, you shall perform penetration testing which includes internet, intranet, wireless, web application, social engineering and physical penetration testing. You shall also perform in-depth analysis of penetration testing results and create a report that describes findings, exploitation procedures, risks and recommendations. Please include a brief outline of the impact this role will have, including overview of customer industry and projects, access to cutting-edge technology etc. Do NOT include customer name. Your Responsibilities (Up to 10, avoiding repetition) * Lead engagements from kickoff with clients through scoping engagements, penetration testing and rep
        Role/Job Title:Pen Tester - Work Location: Reading (3days) The Role - We're looking for a Security Consultant / Senior Security Consultant with expertise in penetration testing. As part of our Cyber Security team, you shall perform penetration testing which includes internet, intranet, wireless, web application, social engineering and physical penetration testing. You shall also perform in-depth analysis of penetration testing results and create a report that describes findings, exploitation procedures, risks and recommendations. Please include a brief outline of the impact this role will have, including overview of customer industry and projects, access to cutting-edge technology etc. Do NOT include customer name. Your Responsibilities (Up to 10, avoiding repetition) * Lead engagements from kickoff with clients through scoping engagements, penetration testing and rep
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        NEW

        Software Engineer

        EMBL-EBI
        Hinxton, Saffron Walden (CB10), CB10 1SD
        From £43,015 to £72,738 per annum based on experience and family
        We are looking for a Developer with a strong record in software development and interest in developing AI-based systems for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary, comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used resources for protein sequence and functional annotation, providing comprehensive, high-quality, and freely accessible data to a large and diverse research community in genomics, proteins and proteomics. As part of the Computational Annotation team in UniProt, you will be working in the design, development and maintenance of systems that automatically assign high-quality functional annotations to millions of unreviewed prote
        We are looking for a Developer with a strong record in software development and interest in developing AI-based systems for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary, comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used resources for protein sequence and functional annotation, providing comprehensive, high-quality, and freely accessible data to a large and diverse research community in genomics, proteins and proteomics. As part of the Computational Annotation team in UniProt, you will be working in the design, development and maintenance of systems that automatically assign high-quality functional annotations to millions of unreviewed prote
        more
        PREMIUM

        Software Engineer

        EMBL-EBI
        Hinxton, Saffron Walden (CB10), CB10 1SD
        From £43,015 to £72,738 per annum based on experience and family
        About the Team - We are looking for a Software engineer with strong record in software development and interested in developing services for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used protein databases serving a large and diverse research community in genomics, proteins and proteomics. Duties & Responsibilities - As part of your daily work, you will be designing and developing software and APIs for the UniProt data services and website, providing protein information to the scientific community and computational biologists.
        About the Team - We are looking for a Software engineer with strong record in software development and interested in developing services for one of the most internationally used data resources in biological science, UniProt. Our team is very dynamic and interdisciplinary comprising talented and enthusiastic software engineers and bioinformaticians working closely together with biologists and scientists. The UniProt resource is one of the most internationally used protein databases serving a large and diverse research community in genomics, proteins and proteomics. Duties & Responsibilities - As part of your daily work, you will be designing and developing software and APIs for the UniProt data services and website, providing protein information to the scientific community and computational biologists.
        more
        PREMIUM

        WordPress Developer

        Bright Purple Resourcing
        Reading (RG1), RG1
        £40,000 - £50,000
        Do you want your coding skills to make a real difference? Join a mission-driven tech-for-good organisation and help build websites and digital tools that positively impact communities. Were looking for a talented WordPress Developerto take ownership of digital platforms. Youll work on everything from themes and custom plugins to integrations and cloud-based solutions, ensuring the sites are fast, secure, and scalable. * Fully remote within the UK * Salary up to £50,000 * 33 days annual leave * Pension & healthcare * A role with genuine social impact * A supportive, mission-driven workplace * Professional development and clear career progression * Building and enhancing WordPress websites with clean, maintainable code * Collaborating with designers, content creators, and stakeholders to bring digital ideas to life
        Do you want your coding skills to make a real difference? Join a mission-driven tech-for-good organisation and help build websites and digital tools that positively impact communities. Were looking for a talented WordPress Developerto take ownership of digital platforms. Youll work on everything from themes and custom plugins to integrations and cloud-based solutions, ensuring the sites are fast, secure, and scalable. * Fully remote within the UK * Salary up to £50,000 * 33 days annual leave * Pension & healthcare * A role with genuine social impact * A supportive, mission-driven workplace * Professional development and clear career progression * Building and enhancing WordPress websites with clean, maintainable code * Collaborating with designers, content creators, and stakeholders to bring digital ideas to life
        more

        Treasury & Trading Platform Lead

        Johnson Matthey Plc
        Royston (SG8), SG8 5HE
        competitive salary and package
        World-changing careers, enabled by Johnson Matthey. With more than 200 years history, j oin us and help to accelerate the transition to net-zero! As a Treasury & Trading Platform Lead , you'll contribute to JM's mission as a world leader in sustainable technology, transforming energy and reducing carbon emissions for a cleaner, brighter future. * Overseeing all systems that support and enable the mission-critical Treasury and Platinum Metal Trading teams - ensuring the platforms are reliable, scalable, and aligned with business needs. * Defining and executing the platform strategy and roadmap - aligning with business goals, prioritizing features and capabilities based on customer needs, value, and ROI, and ensuring scalability and performance. * Building strong partnerships with business stakeholders - translating requirements into technical outcomes and promoting agi
        World-changing careers, enabled by Johnson Matthey. With more than 200 years history, j oin us and help to accelerate the transition to net-zero! As a Treasury & Trading Platform Lead , you'll contribute to JM's mission as a world leader in sustainable technology, transforming energy and reducing carbon emissions for a cleaner, brighter future. * Overseeing all systems that support and enable the mission-critical Treasury and Platinum Metal Trading teams - ensuring the platforms are reliable, scalable, and aligned with business needs. * Defining and executing the platform strategy and roadmap - aligning with business goals, prioritizing features and capabilities based on customer needs, value, and ROI, and ensuring scalability and performance. * Building strong partnerships with business stakeholders - translating requirements into technical outcomes and promoting agi
        more

        Treasury & Trading Platform Specialist

        Johnson Matthey Plc
        Royston (SG8), SG8 5HE
        competitive salary and package
        World-changing careers, enabled by Johnson Matthey. With more than 200 years history, join us and help to accelerate the transition to net-zero! As a Treasury & Trading Platform Specialist, you'll contribute to JM's mission as a world leader in sustainable technology, transforming energy and reducing carbon emissions for a cleaner, brighter future. * Ensuring platform stability and performance through proactive monitoring, optimisation, and adherence to security and compliance standards. * Managing technical delivery and support by overseeing external partners, resolving complex issues, and maintaining detailed solution documentation. * Driving solution design and implementation in collaboration with engineering teams and vendors, ensuring high-quality, scalable configurations aligned with business needs.
        World-changing careers, enabled by Johnson Matthey. With more than 200 years history, join us and help to accelerate the transition to net-zero! As a Treasury & Trading Platform Specialist, you'll contribute to JM's mission as a world leader in sustainable technology, transforming energy and reducing carbon emissions for a cleaner, brighter future. * Ensuring platform stability and performance through proactive monitoring, optimisation, and adherence to security and compliance standards. * Managing technical delivery and support by overseeing external partners, resolving complex issues, and maintaining detailed solution documentation. * Driving solution design and implementation in collaboration with engineering teams and vendors, ensuring high-quality, scalable configurations aligned with business needs.
        more

        Salesforce Developer

        Triad Group PLC
        Milton Keynes (MK1)
        £55000 - £65000 per annum
        Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary: up to £65,000, plus company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a resident in the UK for a minimum of 5 years and have the right to work in the UK. About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens, and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale proj
        Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary: up to £65,000, plus company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a resident in the UK for a minimum of 5 years and have the right to work in the UK. About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens, and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale proj
        more

        Database Engineer

        Grundon
        Wallingford, Oxfordshire, OX10 6LX
        up to 40k DOE
        At Grundon, we are on the lookout for a dynamic, passionate, and driven individual to join our Data team based in Benson. Reporting into the Head of IT/ Finance Director you will play a key role in driving our mission forward managing and optimising the organisation’s data warehouse to ensure high performance, reliability, and accessibility. This role will progressively encompass the design and development of a new data warehouse, along with the structured oversight of its migration process. Working closely within a cross-functional team, you will help translate business requirements into effective data solutions that drive informed, data-driven decision-making across the organisation. Please note as part of this role you will be required to attend to the office a minimum of 3 days each week - What will you do
        At Grundon, we are on the lookout for a dynamic, passionate, and driven individual to join our Data team based in Benson. Reporting into the Head of IT/ Finance Director you will play a key role in driving our mission forward managing and optimising the organisation’s data warehouse to ensure high performance, reliability, and accessibility. This role will progressively encompass the design and development of a new data warehouse, along with the structured oversight of its migration process. Working closely within a cross-functional team, you will help translate business requirements into effective data solutions that drive informed, data-driven decision-making across the organisation. Please note as part of this role you will be required to attend to the office a minimum of 3 days each week - What will you do
        more
        FEATURED

        Engineering Manager - Quality

        Infosum Limited
        Basingstoke, Hampshire
        £80,000 - £150,000 a year
        You will be able to understand and reason about a complex distributed system with a comprehensive data processing API, the ability to process a wide range of complex input data types, and the capability to query that data with a SQL-like query engine.
        You will be able to understand and reason about a complex distributed system with a comprehensive data processing API, the ability to process a wide range of complex input data types, and the capability to query that data with a SQL-like query engine.
        more
        NEW
        You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
        You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
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        FEATURED

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        What is the average salary for API in London?

        Average salary per year
        £72,499

        The average salary for a API in London is £72,499. API in London salaries range from £62,499 to £87,499.

        Frequently Asked Questions

        How many API jobs are there in London?
        There are 237 API jobs within 20 miles of London available on CWJobs right now.

        Where in London are these jobs?

        What other similar jobs are there to API jobs in London?
        As well as API jobs in London, you can find Qa Automation, Quality Assurance, QA Analyst, amongst many others.