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        104 API jobs in Mayfair + 20 miles

        600 exact matches jobs are outside your preferred location

        Senior Software Engineer

        Gigaclear Ltd
        Abingdon, Oxfordshire
        £55,000 - £60,000 a year
        A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
        A role to put your Software Engineering problem solving skills to the test, translating complex technical concepts to cross-functional audiences. You will play a key role in delivering robust, secure, and scalable software systems. Working closely with Product, QA, and DevOps, you will balance hands-on development with architectural contribution, promote Agile best practices, and help raise the engineering bar through coaching, code quality, and continuous improvement initiatives. You will support the teams technical evolution while ensuring reliable product delivery aligned to business needs. * Strong Python Development Capability 5 years+ * Experience implementing and integrating with REST APIs * SQL experience (preferably PostgreSQL and/or MySQL) * Passionate about building quality software * Experience of developing in Rust.
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        6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
        6 month outside IR35 contract - As part of our exciting growth journey, were expanding our Mobile Engineering team and are on the lookout for a talented Android Engineer to join us on a hybrid basis at our London office. This is a rare chance to work on high impact greenfield products for some of the biggest and most iconic sports brands in the world. Youll be at the forefront of building modern, scalable apps from the ground up, helping shape the future of fan engagement across global sport. Youll bring technical expertise and strong delivery focus. Contributing high-quality code, collaborating closely with our in-house teams, and helping us hit key milestones. Youll be embedded in a passionate, cross-functional team and supported to do your best work while working on fast-moving, purpose-driven projects that reach millions of fans worldwide. Requirements
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        IDBS helps BioPharma organizations unlock the potential of AI/ML to improve the lives of patients. As a trusted long-term partner to 80% of the top 20 global BioPharma companies1, IDBS delivers powerful cloud software and services specifically designed to meet the evolving needs of the BioPharma sector. IDBS, a Danaher company, leverages 35 years of scientific informatics expertise to help organizations design, execute and orchestrate processes, manage, contextualize and structure data and gain valuable insights throughout the product lifecycle, from R&D through manufacturing. Known for its signature IDBS E-WorkBook software, IDBS has extended its flexible, scalable solutions to the IDBS Polar and PIMS cloud platforms to help scientists make smarter decisions with assured confidence in both GxP and non-GxP environments.
        IDBS helps BioPharma organizations unlock the potential of AI/ML to improve the lives of patients. As a trusted long-term partner to 80% of the top 20 global BioPharma companies1, IDBS delivers powerful cloud software and services specifically designed to meet the evolving needs of the BioPharma sector. IDBS, a Danaher company, leverages 35 years of scientific informatics expertise to help organizations design, execute and orchestrate processes, manage, contextualize and structure data and gain valuable insights throughout the product lifecycle, from R&D through manufacturing. Known for its signature IDBS E-WorkBook software, IDBS has extended its flexible, scalable solutions to the IDBS Polar and PIMS cloud platforms to help scientists make smarter decisions with assured confidence in both GxP and non-GxP environments.
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        Lime is the world's largest shared electric vehicle company. Were on a mission to build a future where transportation is shared, affordable and carbon-free. Our electric bikes and scooters have powered 700+ million rides in 250+ cities on 5 continents, replacing an estimated 150+ million car trips. Named a Time 100 Most Influential Company and Fast Company Brand That Matters, Lime continues to set the pace for shared micromobility globally. The Client Platform Engineering team manages the lifecycle, security, and overall management of all corporate IT endpoints, both physical and cloud-based. Our environment encompasses macOS, Windows, ChromeOS, iOS, Android, and AWS. This role involves collaborating with cross-functional teams to pinpoint opportunities for boosting operational efficiency and security through effective endpoint management.
        Lime is the world's largest shared electric vehicle company. Were on a mission to build a future where transportation is shared, affordable and carbon-free. Our electric bikes and scooters have powered 700+ million rides in 250+ cities on 5 continents, replacing an estimated 150+ million car trips. Named a Time 100 Most Influential Company and Fast Company Brand That Matters, Lime continues to set the pace for shared micromobility globally. The Client Platform Engineering team manages the lifecycle, security, and overall management of all corporate IT endpoints, both physical and cloud-based. Our environment encompasses macOS, Windows, ChromeOS, iOS, Android, and AWS. This role involves collaborating with cross-functional teams to pinpoint opportunities for boosting operational efficiency and security through effective endpoint management.
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        About Us - TravelPerk is a global travel and expense management platform. Its all-in-one platform gives travelers the freedom they want whilst providing companies with the control they need. The result saves time, money, and hassle for everyone. TravelPerk has industry-leading travel inventory alongside powerful management features, 24/7 customer support, state-of-the-art technology, and consumer-grade design. Founded in 2015 and headquartered in Barcelona, we've grown to over 1,800 people across Europe and North America. In 2022 we became a 'unicorn' and in 2025 we raised $200 million in a Series E funding round, increasing our valuation of $2.7 billion. We've been winning awards too. Since 2023, we've been voted one of the best places to work, one of the fastest-growing apps and tech companies , and a leading pioneer of business travel.
        About Us - TravelPerk is a global travel and expense management platform. Its all-in-one platform gives travelers the freedom they want whilst providing companies with the control they need. The result saves time, money, and hassle for everyone. TravelPerk has industry-leading travel inventory alongside powerful management features, 24/7 customer support, state-of-the-art technology, and consumer-grade design. Founded in 2015 and headquartered in Barcelona, we've grown to over 1,800 people across Europe and North America. In 2022 we became a 'unicorn' and in 2025 we raised $200 million in a Series E funding round, increasing our valuation of $2.7 billion. We've been winning awards too. Since 2023, we've been voted one of the best places to work, one of the fastest-growing apps and tech companies , and a leading pioneer of business travel.
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        It's fun to work in a company where people truly BELIEVE in what they're doing! We're committed to bringing passion and customer focus to the business. About Us - Kyriba is a global leader in liquidity performance that empowers CFOs, Treasurers and IT leaders to connect, protect, forecast and optimize their liquidity. As a secure and scalable SaaS solution, Kyriba brings intelligence and financial automation that enables companies and banks of all sizes to improve their financial performance and increase operational efficiency. Kyribas real-time data and AI-empowered tools empower its 3,000 customers worldwide to quantify exposures, project cash and liquidity, and take action to protect balance sheets, income statements and cash flows. Kyriba manages more than 3.5 billion bank transactions and $15 trillion in payments annually and gives customers complete visibility a
        It's fun to work in a company where people truly BELIEVE in what they're doing! We're committed to bringing passion and customer focus to the business. About Us - Kyriba is a global leader in liquidity performance that empowers CFOs, Treasurers and IT leaders to connect, protect, forecast and optimize their liquidity. As a secure and scalable SaaS solution, Kyriba brings intelligence and financial automation that enables companies and banks of all sizes to improve their financial performance and increase operational efficiency. Kyribas real-time data and AI-empowered tools empower its 3,000 customers worldwide to quantify exposures, project cash and liquidity, and take action to protect balance sheets, income statements and cash flows. Kyriba manages more than 3.5 billion bank transactions and $15 trillion in payments annually and gives customers complete visibility a
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        Experience in API testing (Postman, Swagger, REST API testing)
        Experience in API testing (Postman, Swagger, REST API testing)
        NEW
        Introduce new product offerings such as exotic currencies and API products - Extensive development skills and experience with Java, Spring, Hibernate, Open API, Log4J, etc. Good development skills and experience with Angular, JavaScript, TypeScript, CSS, etc. Good understanding of Oracle relational databases with appropriate SQL knowledge.
        Introduce new product offerings such as exotic currencies and API products - Extensive development skills and experience with Java, Spring, Hibernate, Open API, Log4J, etc. Good development skills and experience with Angular, JavaScript, TypeScript, CSS, etc. Good understanding of Oracle relational databases with appropriate SQL knowledge.
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        As a Fullstack Engineer at Kiln, you will join our Software Development Team, composed of 14 engineers split into 4 squads, to build the future of our SaaS/API-first products [ You will report to our Lead Software Engineer, and collaborate with the Product, Infrastructure and Smart-Contract teams to work on the various products that Kiln offers. Stack: TypeScript, React, PHP, Laravel, REST API * +3 years of experience as a Software Engineer (Backend, Frontend, or Fullstack), designing, building, and deploying user-facing and API-based products . Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
        As a Fullstack Engineer at Kiln, you will join our Software Development Team, composed of 14 engineers split into 4 squads, to build the future of our SaaS/API-first products [ You will report to our Lead Software Engineer, and collaborate with the Product, Infrastructure and Smart-Contract teams to work on the various products that Kiln offers. Stack: TypeScript, React, PHP, Laravel, REST API * +3 years of experience as a Software Engineer (Backend, Frontend, or Fullstack), designing, building, and deploying user-facing and API-based products . Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
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        At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS company.
        At least 2 years as an SA or at least 4 years in a similar customer-facing role, for example as a technical consultant, solution engineer or implementation engineer at an API-first (REST, GraphQL) SaaS company.
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        You can design a RESTful API and list all the pros and cons of your design * You have an API-first product mindset: you care about customer outcomes and you like to listen to their use-cases before diving into code
        You can design a RESTful API and list all the pros and cons of your design * You have an API-first product mindset: you care about customer outcomes and you like to listen to their use-cases before diving into code
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        This is to support the Vonage API group where you will be working with a variety of customers that we aim to solve their business challenges through our Vonage API's
        This is to support the Vonage API group where you will be working with a variety of customers that we aim to solve their business challenges through our Vonage API's
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        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
        2+ years of in a few of the areas: serverless architecture, event-driven architecture, microservices, API-driven cloud-based products including performance management.
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        Frequently Asked Questions

        How many API jobs are there in Mayfair?
        There are 104 API jobs within 20 miles of Mayfair available on CWJobs right now.

        Where in Mayfair are these jobs?
        You can find jobs in Southwark, The City, City (EC3), Frimley.

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