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        Last 14 days
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        69 Permanent API jobs in Mayfair + 20 miles

        350 exact matches jobs are outside your preferred location

        Staff Software Engineer - API Platform

        Data Dog
        London
        Competitive
        We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
        We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
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        Proficient in Python/Typescript/Nodejs, with strong skills in API development.
        Proficient in Python/Typescript/Nodejs, with strong skills in API development.
        NEW
        Act as SME for NW-API across Enterprise Sales, Partnerships, Alliances, and Solution Engineers globally (EMEA, US, APAC). * Maintain expert-level knowledge of NW-API platforms/solutions and communicate value propositions as a recognised industry leader. * Lead client engagements to operationalise and scale NW-API and fraud prevention solutions, driving new revenue opportunities.
        Act as SME for NW-API across Enterprise Sales, Partnerships, Alliances, and Solution Engineers globally (EMEA, US, APAC). * Maintain expert-level knowledge of NW-API platforms/solutions and communicate value propositions as a recognised industry leader. * Lead client engagements to operationalise and scale NW-API and fraud prevention solutions, driving new revenue opportunities.
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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 companies, 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 companies, 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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        Our Professional Services organization is expanding, and we are looking for an experienced Solution Architect to join our growing team. You'll also collaborate closely with our Builders (Product and R&D) to architect comprehensive and scalable client solutions that help clients unlock the full value of our platform. Please note this role requires attending our London office 3 days a week* About The Role * Support new deals through discovery, requirements gathering, and solution design to post-sale delivery, collaborating closely with Sales, Partners, and Customer Success teams * Lead technical consulting engagements for customers, applying industry knowledge in the areas of system scale, security, user governance, and data architecture * Produce solution design documents, system architecture diagrams, and workflow diagrams that bridge the gap between business requirem
        Our Professional Services organization is expanding, and we are looking for an experienced Solution Architect to join our growing team. You'll also collaborate closely with our Builders (Product and R&D) to architect comprehensive and scalable client solutions that help clients unlock the full value of our platform. Please note this role requires attending our London office 3 days a week* About The Role * Support new deals through discovery, requirements gathering, and solution design to post-sale delivery, collaborating closely with Sales, Partners, and Customer Success teams * Lead technical consulting engagements for customers, applying industry knowledge in the areas of system scale, security, user governance, and data architecture * Produce solution design documents, system architecture diagrams, and workflow diagrams that bridge the gap between business requirem
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        NEW
        Collaborating with clients, applying a strong consultative approach, adding true value with both your Architectural skillset and demonstrated experience selling the metrics of a good API strategy to senior business and IT stakeholders.
        Collaborating with clients, applying a strong consultative approach, adding true value with both your Architectural skillset and demonstrated experience selling the metrics of a good API strategy to senior business and IT stakeholders.
        more
        At Mitratech, we are a team of technologists focused on building world-class products that simplify operations in the Legal, Risk, Compliance, and HR functions. We are a close-knit, globally dispersed team that thrives in an ecosystem that supports individual excellence and takes pride in its diverse and inclusive work culture centered around great people practices, learning opportunities, and having fun! Our culture is the ideal blend of entrepreneurial spirit and enterprise investment, enabling the chance to move at a rapid pace with some of the most complex, leading-edge technologies available. For over 35 years, the experts at Mitratech have been focused on solving the complex needs. Today, we serve 20,000 client companies of all sizes globally, representing 30% of the Fortune 500 and over 500,000 users in over 160 countries.
        At Mitratech, we are a team of technologists focused on building world-class products that simplify operations in the Legal, Risk, Compliance, and HR functions. We are a close-knit, globally dispersed team that thrives in an ecosystem that supports individual excellence and takes pride in its diverse and inclusive work culture centered around great people practices, learning opportunities, and having fun! Our culture is the ideal blend of entrepreneurial spirit and enterprise investment, enabling the chance to move at a rapid pace with some of the most complex, leading-edge technologies available. For over 35 years, the experts at Mitratech have been focused on solving the complex needs. Today, we serve 20,000 client companies of all sizes globally, representing 30% of the Fortune 500 and over 500,000 users in over 160 countries.
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        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
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        Working with top developers from around the world, helping to implement Kong Products and Technologies, including our API Gateway, AI Gateway and ServiceMesh solutions - Kong Inc., a leading developer of cloud API technologies, is on a mission to enable companies around the world to become API-first and securely accelerate AI adoption.
        Working with top developers from around the world, helping to implement Kong Products and Technologies, including our API Gateway, AI Gateway and ServiceMesh solutions - Kong Inc., a leading developer of cloud API technologies, is on a mission to enable companies around the world to become API-first and securely accelerate AI adoption.
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        API and third-party integrations experience is essential, including writing ICDs. * Integration with REST Api, ActiveMQ, Kafka, SOAP, IBM WebSphere, MSMQ and more.
        API and third-party integrations experience is essential, including writing ICDs. * Integration with REST Api, ActiveMQ, Kafka, SOAP, IBM WebSphere, MSMQ and more.
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        RESPONSABILITIES Translate business and technical needs into clear product requirements, including user stories, acceptance criteria, and data schemas; Prioritize data features and deliverables based on impact, effort, and strategic alignment; Define and enforce data quality standards (accuracy, completeness, timeliness) for published data sets; Collaborate with engineering and governance teams on lineage, metadata, access controls, and compliance (e.g., GDPR); Develop and maintain a data-product roadmap with versioning, documentation, and API endpoints; Craft external documentation such as data dictionaries, schema definitions, sample queries, and usage guides; Define and track adoption metrics (API calls, downloads, user feedback); Facilitate agile ceremonies to align teams on data-product goals; Mentor junior product team members o
        RESPONSABILITIES Translate business and technical needs into clear product requirements, including user stories, acceptance criteria, and data schemas; Prioritize data features and deliverables based on impact, effort, and strategic alignment; Define and enforce data quality standards (accuracy, completeness, timeliness) for published data sets; Collaborate with engineering and governance teams on lineage, metadata, access controls, and compliance (e.g., GDPR); Develop and maintain a data-product roadmap with versioning, documentation, and API endpoints; Craft external documentation such as data dictionaries, schema definitions, sample queries, and usage guides; Define and track adoption metrics (API calls, downloads, user feedback); Facilitate agile ceremonies to align teams on data-product goals; Mentor junior product team members o
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        Company Description - Founded by experienced entrepreneurs and engineers in 2016, Pismo is a technology company that provides a comprehensive processing platform for banking, card issuing and financial market infrastructure and helps customers innovate and build the next generation of banking and payment solutions. Pismo joined Visa in 2024. Leveraging Visas solutions, our core platform, and an expanding suite of capabilities, Pismo addresses the technological challenges that large banks, marketplaces, and fintech companies face in migrating from legacy systems to more advanced technology in the market. Pismos cloud-based platform empowers firms to build and launch financial products rapidly, scaling as they grow to have a broader audience while keeping high security and availability standards. Pismos 500+ employees are located in more than 10 countries around the wor
        Company Description - Founded by experienced entrepreneurs and engineers in 2016, Pismo is a technology company that provides a comprehensive processing platform for banking, card issuing and financial market infrastructure and helps customers innovate and build the next generation of banking and payment solutions. Pismo joined Visa in 2024. Leveraging Visas solutions, our core platform, and an expanding suite of capabilities, Pismo addresses the technological challenges that large banks, marketplaces, and fintech companies face in migrating from legacy systems to more advanced technology in the market. Pismos cloud-based platform empowers firms to build and launch financial products rapidly, scaling as they grow to have a broader audience while keeping high security and availability standards. Pismos 500+ employees are located in more than 10 countries around the wor
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        Design, implement, and execute automated tests across multiple levels, including unit, integration, contract, API, end-to-end (e2e), and performance testing. * Experience with testing across various levels, including unit, integration, contract, API, e2e, and performance testing.
        Design, implement, and execute automated tests across multiple levels, including unit, integration, contract, API, end-to-end (e2e), and performance testing. * Experience with testing across various levels, including unit, integration, contract, API, e2e, and performance testing.
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        BI Data Developer

        ORBACH AND CHAMBERS LIMITED (Chambers and partners)
        London
        Competitive
        Working knowledge of creating data connections - e.g. SQL and relational databases, DataBricks, JSON files, API services, Data Lakes
        Working knowledge of creating data connections - e.g. SQL and relational databases, DataBricks, JSON files, API services, Data Lakes
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        NEW

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        Frequently Asked Questions

        How many permanent API jobs are there in Mayfair?
        There are 69 permanent API jobs within 20 miles of Mayfair available on CWJobs right now.

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

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