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        47 API jobs in Mayfair + 20 miles

        170 exact matches jobs are outside your preferred location

        Senior C# Developer

        Hays
        London
        £420.0 - £460.0 per day + up to £460 per day (Outside IR35)
        Previous work in API integration
        Previous work in API integration
        NEW
        Strong knowledge of data modelling, API management, and cloud integration.
        Strong knowledge of data modelling, API management, and cloud integration.
        NEWFEATURED
        The role will focus on building and support integrations between new and existing systems using Microsoft Azure PaaS components to develop modular, reusable, and secure integration components aligned with canonical data models and modern API-first principles. * experience with Azure PaaS integration tools: Logic Apps, Functions, API Management, Service Bus, Event Grid * Experience building and managing REST APIs and implementing API-first integration designs * Exposure to OpenAPI/Swagger, API lifecycle management, and version control best practices.
        The role will focus on building and support integrations between new and existing systems using Microsoft Azure PaaS components to develop modular, reusable, and secure integration components aligned with canonical data models and modern API-first principles. * experience with Azure PaaS integration tools: Logic Apps, Functions, API Management, Service Bus, Event Grid * Experience building and managing REST APIs and implementing API-first integration designs * Exposure to OpenAPI/Swagger, API lifecycle management, and version control best practices.
        more

        Cloud Architect

        Zensar Technologies
        London
        From £117,000 to £130,500 per annum
        Extensive experience withAWScloud ecosystem services like EC2, S3, Lambda, SNS/SQS, API Gateway, RDS/DynamoDB, CloudFormation, etc.
        Extensive experience withAWScloud ecosystem services like EC2, S3, Lambda, SNS/SQS, API Gateway, RDS/DynamoDB, CloudFormation, etc.
        more
        NEW

        Technical Architect

        Queen Square Recruitment Limited
        RG40, Wokingham
        £500 per day inside IR35
        Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
        Strong knowledge of the API/integration lifecycle, including design, deployment, and enhancement. * Expertise in RESTful & SOAP API design, APIM policy, and transformations. * Skilled in API/Integration security protocols & best practices. * Practical experience with Postman, API monitoring, and documentation tools. * Knowledge of Open API Specification, WSDL, SOAP, XSLT. * Application Insight proficiency in .NET and .NET Core (Web, API) and working knowledge of VS Code with Azure.
        more
        NEW
        We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
        We're looking for a Senior AWS Platform Engineer to play a hands-on role in a major API infrastructure migration project. * Kong API Gateway (hybrid model) * Strong understanding of API gateways (Kong)
        more
        NEWFEATURED
        You will have experience working with/developing microservices, containerised applications, TypeScript, React(TypeScript), GraphQL / Hasura, API development and integration, PostgreSQL, JavaScript, GoLang, and Python. * Configure and extend Hasura GraphQL Engine, including permissions, computed fields, and API integrations.
        You will have experience working with/developing microservices, containerised applications, TypeScript, React(TypeScript), GraphQL / Hasura, API development and integration, PostgreSQL, JavaScript, GoLang, and Python. * Configure and extend Hasura GraphQL Engine, including permissions, computed fields, and API integrations.
        more
        NEWPREMIUM
        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

        Azure Cosmos Developer

        Infoplus Technologies UK Ltd
        London
        From £450 to £550 per day Daily rates are within Inside IR35
        This role involves developing cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Experience with SQL API and familiarity with other APIs
        This role involves developing cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Experience with SQL API and familiarity with other APIs
        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.
        more
        NEW
        Design, develop, test and deliver application change to meet the needs of the FI Algo trading desks - this will include both API and schema design, and a significant amount of work on real-time KDB+ processes.
        Design, develop, test and deliver application change to meet the needs of the FI Algo trading desks - this will include both API and schema design, and a significant amount of work on real-time KDB+ processes.
        more
        PREMIUM

        Lead .Net Software Developer

        Hireful
        Milton Keynes, Buckinghamshire
        £65k - £75k base + Bonus
        Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
        Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
        more
        NEWFEATURED

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        Frequently Asked Questions

        How many API jobs are there in Mayfair?
        There are 47 API jobs within 20 miles of Mayfair available on CWJobs right now.

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

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