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        10 Contract API jobs in Harwell, Didcot + 20 miles

        Mid-Level Developer - Policing - FTC

        Data Careers
        Little Blenheim, OX5 1RA
        Up to £40000 per annum + excellent pension and other Emp. Bens.
        XSLT, API integrations, Oracle RDBMS - It's a fascinating role developing and enhancing a Police Forces Applications, (as well as the API's so that they integrate with other the Police Force applications), that deliver critical services to the wider community. * Strong API / writing API Integrations, (XSLT, XML etc.)
        XSLT, API integrations, Oracle RDBMS - It's a fascinating role developing and enhancing a Police Forces Applications, (as well as the API's so that they integrate with other the Police Force applications), that deliver critical services to the wider community. * Strong API / writing API Integrations, (XSLT, XML etc.)
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        NEW
        Job Description Workday Integration Consultant - Key Responsibilities - Design, develop, and maintain Workday integrations including Core Connectors, EIBs, Studio, and custom solutions. Leverage Workday HCM core knowledge to deliver effective integration solutions. Perform XML/XSLT transformations and handle various file formats (CSV, XML, JSON, etc.). Work with APIs, Web Services (SOAP/REST), and file transfer protocols (SFTP/FTP). Ensure accuracy, compliance, and performance of integrations across HR, Payroll, Benefits, and Finance systems. Collaborate with business stakeholders to translate requirements and process logic into actionable code and functional solutions. Troubleshoot, optimize, and support integrations in production environments. Plan, prioritize, and deliver assigned work within agreed timelines. Required Skills & Qualifications
        Job Description Workday Integration Consultant - Key Responsibilities - Design, develop, and maintain Workday integrations including Core Connectors, EIBs, Studio, and custom solutions. Leverage Workday HCM core knowledge to deliver effective integration solutions. Perform XML/XSLT transformations and handle various file formats (CSV, XML, JSON, etc.). Work with APIs, Web Services (SOAP/REST), and file transfer protocols (SFTP/FTP). Ensure accuracy, compliance, and performance of integrations across HR, Payroll, Benefits, and Finance systems. Collaborate with business stakeholders to translate requirements and process logic into actionable code and functional solutions. Troubleshoot, optimize, and support integrations in production environments. Plan, prioritize, and deliver assigned work within agreed timelines. Required Skills & Qualifications
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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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        Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But we're more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks , we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA , and we have an insatiable hunger to 'wow'! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
        Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But we're more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks , we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA , and we have an insatiable hunger to 'wow'! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
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        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced Experienced JavaScript Developer (Full Stack) to join our Code team, to help build and support internal and external web applications and APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced Experienced JavaScript Developer (Full Stack) to join our Code team, to help build and support internal and external web applications and APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
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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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        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
        We want you to #JOINTHEREBELLION! For 30 years weve been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and through 2000AD, publish comics and graphic novels such as the amazing Judge Dredd. We are seeking an experienced and highly skilled back-end Senior Online Developer to join our tech team, to help build and support internal and external web APIs to support our game engine team. The successful candidate will join a small team and user their specialist JavaScript knowledge to be involved in the entire software development lifecycle, from requirements gathering and system design to implementation, testing, deployment, and maintenance.
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        Oxford, GB, OX4 4DQ - Company: Nominet - Were Nominet a world-leading domain name registry operating at the heart of the UK internet. While we're best known for running .UK domains, our DNS expertise also underpins critical internet infrastructure that government services, including the NHS, rely on. As a public benefit company, our work has a positive impact on society. Weve donated millions to projects that use technology to improve peoples lives and have committed to delivering £60m worth of support over the next three years. As the Head of Software Engineering (Registry) at Nominet, you will lead a core technology engineering team to deliver industry leading Registry Systems for the internet.? This is a critical role with responsibility for engineering Nominets main line of business. You will manage a highly skilled team who are experts in Registry Systems and ful
        Oxford, GB, OX4 4DQ - Company: Nominet - Were Nominet a world-leading domain name registry operating at the heart of the UK internet. While we're best known for running .UK domains, our DNS expertise also underpins critical internet infrastructure that government services, including the NHS, rely on. As a public benefit company, our work has a positive impact on society. Weve donated millions to projects that use technology to improve peoples lives and have committed to delivering £60m worth of support over the next three years. As the Head of Software Engineering (Registry) at Nominet, you will lead a core technology engineering team to deliver industry leading Registry Systems for the internet.? This is a critical role with responsibility for engineering Nominets main line of business. You will manage a highly skilled team who are experts in Registry Systems and ful
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        Company Description - Why Babble? Babble is a Customer Experience-led growth business. As the ultimate Trusted Advisor for cloud-based technologies, we specialize in empowering businesses with the best solutions from the world's leading providers. * Microsoft Modern Work * Cybersecurity * Contact Centre Technology * Mobile Solutions * Communications & Connectivity - With nearly 15,000 customers, we're just scratching the surface of our potential. Many of our clients currently benefit from one or two of our technologies, presenting an incredible opportunity to introduce them to our full suite of market-leading solutions. Join us on this exciting journey and let's achieve greatness together! About Us | Leading UK Cloud Solutions Provider | Babble - Job Description - Join Our Dynamic Team as a Key Accounts - Contact Centre as a Service Support Engineer! Are you passionat
        Company Description - Why Babble? Babble is a Customer Experience-led growth business. As the ultimate Trusted Advisor for cloud-based technologies, we specialize in empowering businesses with the best solutions from the world's leading providers. * Microsoft Modern Work * Cybersecurity * Contact Centre Technology * Mobile Solutions * Communications & Connectivity - With nearly 15,000 customers, we're just scratching the surface of our potential. Many of our clients currently benefit from one or two of our technologies, presenting an incredible opportunity to introduce them to our full suite of market-leading solutions. Join us on this exciting journey and let's achieve greatness together! About Us | Leading UK Cloud Solutions Provider | Babble - Job Description - Join Our Dynamic Team as a Key Accounts - Contact Centre as a Service Support Engineer! Are you passionat
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        350 exact matches jobs are outside your preferred location

        Senior Business Analyst (API, YAML) - Software Solution - Remote (UK or Europe) My client is looking for a Senior Business Analyst to join our team and drive the successful delivery of API services and supporting documentation for an upcoming product launch. * Collaborate with product owners, engineers, and stakeholders to define and refine business requirements for API services supporting the product launch. o API specifications * Utilize business analytics and intelligence tools to provide insights and recommendations that shape API functionality and project direction. * Hands-on experience with API services (analysis, documentation, testing support). * Familiarity with JSON for API-related specifications. * Knowledge of API testing
        Senior Business Analyst (API, YAML) - Software Solution - Remote (UK or Europe) My client is looking for a Senior Business Analyst to join our team and drive the successful delivery of API services and supporting documentation for an upcoming product launch. * Collaborate with product owners, engineers, and stakeholders to define and refine business requirements for API services supporting the product launch. o API specifications * Utilize business analytics and intelligence tools to provide insights and recommendations that shape API functionality and project direction. * Hands-on experience with API services (analysis, documentation, testing support). * Familiarity with JSON for API-related specifications. * Knowledge of API testing
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        Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
        Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
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        Senior Integration Developer

        Hays
        London
        £500.0 - £515.0 per day + up to £515 pd (InsideIR35)
        Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
        Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
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        NEW

        Senior Integration Developer

        Hays
        London
        £500.0 - £515.0 per day + up to £515 pd (InsideIR35)
        Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
        Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
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        £600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
        £600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
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        £600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
        £600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
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        You will design, build, and manage API-based integrations across Google Cloud Platform, ensuring secure, scalable, and high-performing solutions. * Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. * Proven experience in API integration patterns and tools. * Strong knowledge of OAuth2, API Keys, and signed URL authentication methods.
        You will design, build, and manage API-based integrations across Google Cloud Platform, ensuring secure, scalable, and high-performing solutions. * Develop and manage RESTful API integrations using signed URLs, API Keys, and OAuth2. * Proven experience in API integration patterns and tools. * Strong knowledge of OAuth2, API Keys, and signed URL authentication methods.
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        Excellent skills in designing and delivering integrations using Microsoft Azure PaaS (Functions, Logic Apps, API Management, Service Bus,) * Expertise in integration strategy, API management, and canonical data models.
        Excellent skills in designing and delivering integrations using Microsoft Azure PaaS (Functions, Logic Apps, API Management, Service Bus,) * Expertise in integration strategy, API management, and canonical data models.
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        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.
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        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.
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        NEW

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        Frequently Asked Questions

        How many contract API jobs are there in Harwell, Didcot?
        There are 10 contract API jobs within 20 miles of Harwell, Didcot available on CWJobs right now.

        Where in Harwell, Didcot are these contract jobs?
        You can find contract jobs in Brentford End, Fivensgreen, Haslemere Industrial Estate.

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