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        148 API jobs in London + 20 miles

        DATA ANALYST

        Sadel Group
        West End, W1
        Up to £50,000 per annum
        Exposure to OpenAI API or other modern AI/ML integrations.
        Exposure to OpenAI API or other modern AI/ML integrations.
        NEW
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
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        NEW
        We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
        We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
        more
        NEW
        Backend & Data Proficiency: Skilled in Python, Node.js, PostgreSQL, MongoDB, and API security. * Security & Compliance: Strong understanding of GDPR, API authentication, and observability.
        Backend & Data Proficiency: Skilled in Python, Node.js, PostgreSQL, MongoDB, and API security. * Security & Compliance: Strong understanding of GDPR, API authentication, and observability.
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        NEW

        Software Developer-MS-Stack

        Solus Accident Repair Centres
        North London, London
        GBP £35,000.00/Yr. - GBP £50,000.00/Yr.
        Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
        Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
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        NEW

        Global Claims IT Leader

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

        Senior MVC Developer

        Southern Communications Ltd
        HP2, Hemel Hempstead
        £75,000 per annum
        Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
        Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
        more
        NEW
        Build and work with modern API and microservices architectures
        Build and work with modern API and microservices architectures
        NEW

        Senior Digital Developer (Vue/React, .Net Core, Azure)

        Stott & May Professional Search Limited
        London
        £70000 - £80000 per annum + Benefits
        Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
        Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
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        NEW
        API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
        API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
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        NEW
        My client is a high-profile consultancy who require an Endur Solution Architect, with experience in Endur and in Energy Trading and Risk Management (ETRM) systems, to work closely with an end customer. * Proven expertise as a Subject Matter Expert (SME) in Energy Trading and Risk Management (ETRM) systems, with deep specialization in Endur. * Ability to deliver strategic guidance and solutions for complex trading and risk management scenarios. * Strong capability to optimize Endur functionalities across front-office, middle-office, and back-office operations. * Demonstrated technical leadership in Endur-related projects, ensuring alignment with business goals and industry standards. * Solid understanding of system integration principles, including APIs, middleware, and data interfaces for seamless enterprise connectivity.
        My client is a high-profile consultancy who require an Endur Solution Architect, with experience in Endur and in Energy Trading and Risk Management (ETRM) systems, to work closely with an end customer. * Proven expertise as a Subject Matter Expert (SME) in Energy Trading and Risk Management (ETRM) systems, with deep specialization in Endur. * Ability to deliver strategic guidance and solutions for complex trading and risk management scenarios. * Strong capability to optimize Endur functionalities across front-office, middle-office, and back-office operations. * Demonstrated technical leadership in Endur-related projects, ensuring alignment with business goals and industry standards. * Solid understanding of system integration principles, including APIs, middleware, and data interfaces for seamless enterprise connectivity.
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        NEW
        Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
        Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
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        NEW
        Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
        Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
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        NEWFEATURED

        Backend engineer

        LA International Computer Consultants Ltd
        EC1, City of London
        £500 - £550 per day
        Role: Backend engineer - Rate: IR35 Status yet to be determined - Location: Remote with occasional travel to London - Duration: 6-month initial contract - SC clearance required. About the Role - You are a systems thinker with deep experience in backend engineering and distributed - data infrastructure. You thrive in high-stakes environments, know how to ship reliable - code fast, and are pragmatic about trade-o=s. You understand the unique constraints of - experimental, edge-deployable systems, especially in air-gapped environments where - resilience and autonomy matter most. This role focuses on building and adapting backend services to support experimental AI - systems deployed in sensitive Defence contexts. You will help create and manage - robust, portable pipelines for data ingestion, orchestration, model interaction, and - querying - all within a classified, com
        Role: Backend engineer - Rate: IR35 Status yet to be determined - Location: Remote with occasional travel to London - Duration: 6-month initial contract - SC clearance required. About the Role - You are a systems thinker with deep experience in backend engineering and distributed - data infrastructure. You thrive in high-stakes environments, know how to ship reliable - code fast, and are pragmatic about trade-o=s. You understand the unique constraints of - experimental, edge-deployable systems, especially in air-gapped environments where - resilience and autonomy matter most. This role focuses on building and adapting backend services to support experimental AI - systems deployed in sensitive Defence contexts. You will help create and manage - robust, portable pipelines for data ingestion, orchestration, model interaction, and - querying - all within a classified, com
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        NEW
        Level: Mid-Senior/Senior; Remuneration dependent upon experience - All applications should include a covering letter; references should also be available on request. Who We Are - Ochre is a music retail technology company, helping labels, artists, distributors, and brands to run their ecommerce operations. Growing from our roots in music D2C (direct-to-consumer) retail, we are becoming a leader in providing tailored and scalable ecommerce solutions for the music industry. We work with some of the worlds best labels and artists - including Warp, Oasis, Dirty Hit, Ninja Tune, Partisan Records, Anjuna and many, many more. We are a creative company dedicated to helping our clients succeed in music ecommerce through best-in-class tools and services. As we expand and develop, we want to find new team members who are not only skilled in their field - but also passionate abou
        Level: Mid-Senior/Senior; Remuneration dependent upon experience - All applications should include a covering letter; references should also be available on request. Who We Are - Ochre is a music retail technology company, helping labels, artists, distributors, and brands to run their ecommerce operations. Growing from our roots in music D2C (direct-to-consumer) retail, we are becoming a leader in providing tailored and scalable ecommerce solutions for the music industry. We work with some of the worlds best labels and artists - including Warp, Oasis, Dirty Hit, Ninja Tune, Partisan Records, Anjuna and many, many more. We are a creative company dedicated to helping our clients succeed in music ecommerce through best-in-class tools and services. As we expand and develop, we want to find new team members who are not only skilled in their field - but also passionate abou
        more
        NEW

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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 148 API jobs within 20 miles of London available on CWJobs right now.

        Where in London are these jobs?
        You can find jobs in City of London, Central London, West End.

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