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        585 Contract API jobs in London + 20 miles

        254 exact matches jobs are outside your preferred location

        Software Engineer

        Cegeka UK Limited
        Reading, Berkshire
        +10% Bonus
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
        more
        NEW
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. * Design, develop, test, and maintain Java-based applications using the Spring framework. Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications. * Document technical designs, processes, and solutions.
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. * Design, develop, test, and maintain Java-based applications using the Spring framework. Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications. * Document technical designs, processes, and solutions.
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        NEW
        Job Description - Role Type: PermanentHybrid Working: 2 x weeklyLocation: Farnborough or London - DXCs Insurance Software and BPS business provides a range of software and services to the global insurance market including life, wealth, health, commercial and speciality, property and casualty, and reinsurance. DXC is also a key partner of the London Market, providing digital transformation and outsourcing services. DXCs insurance business has 13,000 domain experts serving 2,000 insurance customers operating in over 100 countries worldwide. Are you a dynamic Business Analyst or Systems Analyst with a passion for technology and insurance? Join our Global Specialty Implementation team at DXC Technology, where youll play a key role in delivering our industry-leading Assure product to ISB Insurance customers across Europe.
        Job Description - Role Type: PermanentHybrid Working: 2 x weeklyLocation: Farnborough or London - DXCs Insurance Software and BPS business provides a range of software and services to the global insurance market including life, wealth, health, commercial and speciality, property and casualty, and reinsurance. DXC is also a key partner of the London Market, providing digital transformation and outsourcing services. DXCs insurance business has 13,000 domain experts serving 2,000 insurance customers operating in over 100 countries worldwide. Are you a dynamic Business Analyst or Systems Analyst with a passion for technology and insurance? Join our Global Specialty Implementation team at DXC Technology, where youll play a key role in delivering our industry-leading Assure product to ISB Insurance customers across Europe.
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        NEWPREMIUM

        ESRI GIS Subject Matter Expert (SME)

        Stackstudio Digital Ltd.
        RG40, Wokingham
        From £400 to £450 per day
        Role/Job Title: ESRI GIS Subject Matter Expert (SME) Work Location: Wokingham - If Hybrid, Days Required in Office: 3 days a week - The Role - We are seeking an experienced ESRI GIS Subject Matter Expert (SME) to lead the design, implementation, and optimization of a scalable GIS platform that supports strategic spatial energy planning. The platform will enable environmental impact assessments, economic modelling, and the integration of community preferences. The SME will be responsible for consolidating and migrating diverse spatial datasets into a unified system, ensuring data accuracy, quality, and accessibility, while supporting secure, role-based access, automation, and interoperability with internal and external systems. Your Responsibilities - Platform Design & Implementation * Architect and deploy a scalable ESRI-based GIS platform (ArcGIS Enterprise, ArcGIS O
        Role/Job Title: ESRI GIS Subject Matter Expert (SME) Work Location: Wokingham - If Hybrid, Days Required in Office: 3 days a week - The Role - We are seeking an experienced ESRI GIS Subject Matter Expert (SME) to lead the design, implementation, and optimization of a scalable GIS platform that supports strategic spatial energy planning. The platform will enable environmental impact assessments, economic modelling, and the integration of community preferences. The SME will be responsible for consolidating and migrating diverse spatial datasets into a unified system, ensuring data accuracy, quality, and accessibility, while supporting secure, role-based access, automation, and interoperability with internal and external systems. Your Responsibilities - Platform Design & Implementation * Architect and deploy a scalable ESRI-based GIS platform (ArcGIS Enterprise, ArcGIS O
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        NEW

        Digital Workflow & Automation Consultant

        Apogee Corporation**
        RG1, Reading, RG1 1LX
        Competitive Salary + Car + Remote Working
        With over 30 years of expertise, Apogee transforms how organisations of every size and sector manage their IT delivering everything they need through one seamless point of contact. As an independent subsidiary of HP Inc., we combine the agility of a specialist provider with the power of one of the worlds leading technology companies, giving our clients instant access to cutting-edge innovation backed by market-leading service operations! This is more than a technical role it is an opportunity to shape how organisations work! You will be at the forefront of designing and implementing intelligent workflows that free people from repetitive tasks and unlock their productivity. Working closely with colleagues, customers, and partners, you will transform processes and integrate cutting-edge technologies into real-world solutions. What You Will Do
        With over 30 years of expertise, Apogee transforms how organisations of every size and sector manage their IT delivering everything they need through one seamless point of contact. As an independent subsidiary of HP Inc., we combine the agility of a specialist provider with the power of one of the worlds leading technology companies, giving our clients instant access to cutting-edge innovation backed by market-leading service operations! This is more than a technical role it is an opportunity to shape how organisations work! You will be at the forefront of designing and implementing intelligent workflows that free people from repetitive tasks and unlock their productivity. Working closely with colleagues, customers, and partners, you will transform processes and integrate cutting-edge technologies into real-world solutions. What You Will Do
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        NEW

        AI Lead Developer

        Colchester Institute Enterprises Limited
        CO3, Colchester, CO3 3LF
        £42000.92 to £45906.64 per year
        Join Colchester Institute – Where Your Career Makes a Difference - At Colchester Institute, we believe in the power of education to transform lives and communities. As one of the leading providers of education and training in the region, we are proud to offer a dynamic, supportive, and forward-thinking working environment. Whether you're an experienced professional or just starting out, working with us means being part of a team that values innovation, inclusivity, and excellence. We are committed to nurturing talent and creating opportunities for continuous professional growth and development. We are especially passionate about driving diversity and inspiring individuals from all backgrounds to thrive in careers across a wide range of sectors. This position is located within our Digital Solutions team in the IT & Digital Services department.
        Join Colchester Institute – Where Your Career Makes a Difference - At Colchester Institute, we believe in the power of education to transform lives and communities. As one of the leading providers of education and training in the region, we are proud to offer a dynamic, supportive, and forward-thinking working environment. Whether you're an experienced professional or just starting out, working with us means being part of a team that values innovation, inclusivity, and excellence. We are committed to nurturing talent and creating opportunities for continuous professional growth and development. We are especially passionate about driving diversity and inspiring individuals from all backgrounds to thrive in careers across a wide range of sectors. This position is located within our Digital Solutions team in the IT & Digital Services department.
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        NEWFEATURED

        IT Application Specialist

        Labyrinth Technologies
        GU51, Fleet
        £42,000 – £45,000 per annum
        Exciting IT Application Support Analyst role with international travel, competitive salary (£42k–£45k), and career development opportunities in a growing, innovative IT company. Fleet, Hampshire (with international travel) * Full time, permanent (40 hours, Monday – Friday) * 60% shifts: 08:30 – 18:00 & 40% shifts: 12:00 – 20:00 * Occasional weekend work required * £42,000 – £45,000 per annum - Please Note: Applicants must be authorised to work in the UK - Labyrinth has grown significantly in recent years by providing honest, efficient, and forward-thinking IT support. We are passionate about transforming the reputation of the IT services industry and driving real change. As part of our team, you’ll enjoy an excellent work culture, access to cutting-edge technologies, and the chance to make a measurable impact. The Role
        Exciting IT Application Support Analyst role with international travel, competitive salary (£42k–£45k), and career development opportunities in a growing, innovative IT company. Fleet, Hampshire (with international travel) * Full time, permanent (40 hours, Monday – Friday) * 60% shifts: 08:30 – 18:00 & 40% shifts: 12:00 – 20:00 * Occasional weekend work required * £42,000 – £45,000 per annum - Please Note: Applicants must be authorised to work in the UK - Labyrinth has grown significantly in recent years by providing honest, efficient, and forward-thinking IT support. We are passionate about transforming the reputation of the IT services industry and driving real change. As part of our team, you’ll enjoy an excellent work culture, access to cutting-edge technologies, and the chance to make a measurable impact. The Role
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        NEWFEATURED

        Lead Android Engineer

        Halian Technology Limited
        RG1, Reading
        From £82,000 to £92,000 per annum
        Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
        Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
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        NEW

        Lead Android Engineer

        Halian Technology Limited
        RG12, Bracknell
        From £82,000 to £92,000 per annum
        Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
        Halian Technology are searching for aLead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
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        NEW
        Are you passionate about creating high-performing, flexible, and reusable web applications? Arms Digital Team is looking for a Full Stack Developer to join our Global Marketing group, helping build and evolve our flagship commercial websites. This is an exciting opportunity to give to high-visibility projects and craft special digital experiences that reach millions of users * Develop and maintain Arms key marketing websites and digital experiences * Translate visual designs and business requirements into clean, performant, and accessible web solutions * Follow Arms software development lifecycle and give to the roadmap for our frontend framework * Leverage AI tools to accelerate development and improve code quality * Collaborate with IT, architecture, security, legal, and external development partners
        Are you passionate about creating high-performing, flexible, and reusable web applications? Arms Digital Team is looking for a Full Stack Developer to join our Global Marketing group, helping build and evolve our flagship commercial websites. This is an exciting opportunity to give to high-visibility projects and craft special digital experiences that reach millions of users * Develop and maintain Arms key marketing websites and digital experiences * Translate visual designs and business requirements into clean, performant, and accessible web solutions * Follow Arms software development lifecycle and give to the roadmap for our frontend framework * Leverage AI tools to accelerate development and improve code quality * Collaborate with IT, architecture, security, legal, and external development partners
        more

        Systems Manager - Oracle Fusion Specialist

        EFCI Group Ltd
        OX4, Oxford
        From £75,000 to £90,000 per annum bonus + travel allowance
        Lead Enterprise Systems for a Visionary Global Research & Development Organisation - Job Title: Systems Manager - Department: Technology - Reports to: Head of Application Integration Services - Location: South Oxford - Effective Date: ASAP - About the Organisation - We are a rapidly growing, mission-driven organisation focused on translating pioneering science and advanced technology into tangible, end-to-end solutions for some of humanity's most complex challenges. Our work is structured around high-impact humane endeavours, including health and medical science, sustainable resource management, clean energy, and advanced robotics/AI. We operate at the intersection of deep research and product development, dedicated to turning scientific breakthroughs into practical applications with high global impact. We are committed to long-term innovation and sustainability.
        Lead Enterprise Systems for a Visionary Global Research & Development Organisation - Job Title: Systems Manager - Department: Technology - Reports to: Head of Application Integration Services - Location: South Oxford - Effective Date: ASAP - About the Organisation - We are a rapidly growing, mission-driven organisation focused on translating pioneering science and advanced technology into tangible, end-to-end solutions for some of humanity's most complex challenges. Our work is structured around high-impact humane endeavours, including health and medical science, sustainable resource management, clean energy, and advanced robotics/AI. We operate at the intersection of deep research and product development, dedicated to turning scientific breakthroughs into practical applications with high global impact. We are committed to long-term innovation and sustainability.
        more
        We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
        We are looking for an enthusiastic and proactive Automation Tester with Python and Pytest experience to join our fantastic fintech client, largely remote with get togethers once a month in central London! This Automation Tester will be backend-focused, testing the server-side components, ensuring that the database (SQL), APIs, and business logic function correctly and efficiently. * Backend Automation testing skills with Python and Pytest. * Solid SQL skills and experience with relational databases. * Solid experience in automation testing using tools such as Selenium, Java, PHP, Go, or similar technologies. * Experience with Postman, SOAP UI, and Cucumber. * Batch processing experience. * Financial services / fintech experience. If you're passionate about testing, automation, and continuous learning, we would love to hear from you!
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        £45,000 - 55,000 GBP - Onsite WORKING - Location: Stevenage, Cambridge, East of England - United Kingdom Type: Permanent - Data Engineer - Generative AI | Defence Technology - A leading international defence organisation is seeking an experienced Data Engineer with a focus on Generative AI to join their IM GenAI Delivery Office in the UK. You will play a pivotal role in designing, managing, and optimising datasets that support advanced defence systems and critical internal projects. * Develop and maintain robust, secure, and high-integrity datasets for internal defence applications. * Design and optimise data pipelines to ensure reliable, compliant, and scalable solutions. * Apply your expertise in Generative AI, NLP, and OCR to enhance and automate data processes. * Build ETL workflows, APIs, and other data integration solutions tailored for mission-critical environm
        £45,000 - 55,000 GBP - Onsite WORKING - Location: Stevenage, Cambridge, East of England - United Kingdom Type: Permanent - Data Engineer - Generative AI | Defence Technology - A leading international defence organisation is seeking an experienced Data Engineer with a focus on Generative AI to join their IM GenAI Delivery Office in the UK. You will play a pivotal role in designing, managing, and optimising datasets that support advanced defence systems and critical internal projects. * Develop and maintain robust, secure, and high-integrity datasets for internal defence applications. * Design and optimise data pipelines to ensure reliable, compliant, and scalable solutions. * Apply your expertise in Generative AI, NLP, and OCR to enhance and automate data processes. * Build ETL workflows, APIs, and other data integration solutions tailored for mission-critical environm
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        PREMIUM

        Software Support Engineer

        S-SA Digital Recruitment Ltd
        MK41, Bedford
        From £32,000 to £38,000 per annum Excellent Benefits
        Bedford Hybrid (1 day a week office) £3038k + Benefits UK Only (ILR or above due to clearance) Join a leading SaaS company as a Software Support Engineer, helping customers get the best from their low-code, SaaS platform. Youll be the bridge between development and clients solving issues, supporting workflows, and delivering excellent service. * Software/Application Support experience (or relevant degree) * Knowledge of JavaScript, HTML, CSS, APIs * Strong communication & problem-solving skills * Customer-focused, logical, calm under pressure Nice to have: Low-Code, SaaS, DevOps, ITIL, Software Testing This is an exciting chance to build your career in tech with clear progression in a fast-growing SaaS business, offering hybrid working with 1 day a week in the office. Apply now with your CV for immediate interview!
        Bedford Hybrid (1 day a week office) £3038k + Benefits UK Only (ILR or above due to clearance) Join a leading SaaS company as a Software Support Engineer, helping customers get the best from their low-code, SaaS platform. Youll be the bridge between development and clients solving issues, supporting workflows, and delivering excellent service. * Software/Application Support experience (or relevant degree) * Knowledge of JavaScript, HTML, CSS, APIs * Strong communication & problem-solving skills * Customer-focused, logical, calm under pressure Nice to have: Low-Code, SaaS, DevOps, ITIL, Software Testing This is an exciting chance to build your career in tech with clear progression in a fast-growing SaaS business, offering hybrid working with 1 day a week in the office. Apply now with your CV for immediate interview!
        more

        SDET-Java

        Randstad Digital
        RH15, Burgess Hill
        £55000 - £60000 per annum
        Knowledge of the following tools Cucumber Godog or other BDD tools Kubernetes Docker Rest Assured Rest or other REST API testing tools Wiremock Mountebank or other HTTP stubbing tools
        Knowledge of the following tools Cucumber Godog or other BDD tools Kubernetes Docker Rest Assured Rest or other REST API testing tools Wiremock Mountebank or other HTTP stubbing tools
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        NEWFEATURED

        CTO

        Leo Technology
        GU31, Petersfield, G U31
        £100000 - £120000 per annum + Equity options
        Experience with API design and development for both internal and external use cases
        Experience with API design and development for both internal and external use cases
        NEW
        Were looking for an Interim API Integrations Specialist to join our team on an initial 3-month contract with the potential for extension based on project requirements . * Design, develop, and maintain API integrations between internal systems & external SaaS platforms * Build & maintain API documentation & support internal teams with integration best practices * Minimum of 5 years experience in software development or system integration, including at least 2 years in API design, or technical architecture * Strong understanding of cybersecurity principles, data protection, and global compliance, with familiarity in security best practices, common controls, and OAuth2 / API authentication methods * Hands-on experience with RESTful API design and integration, workflow au
        Were looking for an Interim API Integrations Specialist to join our team on an initial 3-month contract with the potential for extension based on project requirements . * Design, develop, and maintain API integrations between internal systems & external SaaS platforms * Build & maintain API documentation & support internal teams with integration best practices * Minimum of 5 years experience in software development or system integration, including at least 2 years in API design, or technical architecture * Strong understanding of cybersecurity principles, data protection, and global compliance, with familiarity in security best practices, common controls, and OAuth2 / API authentication methods * Hands-on experience with RESTful API design and integration, workflow au
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        Good understanding of Web Services protocols such as REST and API design. -Understanding of industry IT Direction (Open Source, Cloud, DevOps, API economy, Big Data etc).
        Good understanding of Web Services protocols such as REST and API design. -Understanding of industry IT Direction (Open Source, Cloud, DevOps, API economy, Big Data etc).
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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 contract API jobs are there in London?
        There are 585 contract API jobs within 20 miles of London available on CWJobs right now.

        Where in London are these contract jobs?
        You can find contract jobs in City of London, South West London, South East London.

        What other similar jobs are there to contract API jobs in London?
        As well as contract API jobs in London, you can find contract DevOps, Implementation, React Developer, amongst many others.