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        29 Contract API jobs in Brentwood + 20 miles

        Senior Data Engineer

        WITH INTELLIGENCE LIMITED
        City of London, London
        £70,000 - £90,000 a year
        Over the past 25 years, With Intelligence has evolved from a traditional financial publisher into a dynamic, product-led fintech company. Our mission is to empower investors and managers worldwide by connecting them to the people and data they need to raise and allocate assets efficiently. We have recently secured a new round of funding from a prominent technology investor. This investment will drive our committed plan to elevate our product into a pioneering, market-leading platform. We are rapidly expanding our focus on data, both internally and within our products and services. We are now looking for more help in this area to keep up with the growing demands of a dynamic, data driven organisation. We need someone that wants to get stuck in and do stuff! The role requires knowledge and understanding of some data and technical concepts and tools, but we do not expect
        Over the past 25 years, With Intelligence has evolved from a traditional financial publisher into a dynamic, product-led fintech company. Our mission is to empower investors and managers worldwide by connecting them to the people and data they need to raise and allocate assets efficiently. We have recently secured a new round of funding from a prominent technology investor. This investment will drive our committed plan to elevate our product into a pioneering, market-leading platform. We are rapidly expanding our focus on data, both internally and within our products and services. We are now looking for more help in this area to keep up with the growing demands of a dynamic, data driven organisation. We need someone that wants to get stuck in and do stuff! The role requires knowledge and understanding of some data and technical concepts and tools, but we do not expect
        more
        Job Information - Date Opened - 12/09/2025 - Job Type - Contract - Work Experience - 5+ years - Industry - Government & Public Sector - Salary - 400 - 500 outside - City - London - Province - Greater London - Country - United Kingdom - Postal Code - EC1A - The role - Were hiring a Data Scientist with strong Generative-AI experience to design, build, and ship AI-powered tools end-to-end. Youll work in a small, multi-disciplinary team and take ownership from discovery to deployment: scoping use-cases, building prototypes, hardening them for production, and putting the right evaluation and governance around them. What youll do - Build GenAI tools end-to-end (independently): chat/assistants, document Q&A (RAG), summarisation, classification, extraction, and workflow/agent automations. Own evaluation & safety : create offline/online eval sets, measure faithfulness/hallucin
        Job Information - Date Opened - 12/09/2025 - Job Type - Contract - Work Experience - 5+ years - Industry - Government & Public Sector - Salary - 400 - 500 outside - City - London - Province - Greater London - Country - United Kingdom - Postal Code - EC1A - The role - Were hiring a Data Scientist with strong Generative-AI experience to design, build, and ship AI-powered tools end-to-end. Youll work in a small, multi-disciplinary team and take ownership from discovery to deployment: scoping use-cases, building prototypes, hardening them for production, and putting the right evaluation and governance around them. What youll do - Build GenAI tools end-to-end (independently): chat/assistants, document Q&A (RAG), summarisation, classification, extraction, and workflow/agent automations. Own evaluation & safety : create offline/online eval sets, measure faithfulness/hallucin
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        Programmer Analyst Senior

        Transax Merchant Services
        City of London, London
        Competitive
        Full time - Experienced (relevant combo of work and education) Bachelor of Computer Science - 15 - 25% Every day, our teams innovate across the world of finance. We collaborate to work smarter, while making a difference. We believe in diversity and inclusivity, giving a voice to everyone on the team. And we celebrate our success together. If you want to make an impact in fintech, wed like to know: Are you FIS? As a Programmer Analyst at FIS, youll be at the forefront of fintech innovationdesigning and building next-generation solutions that redefine how the world pays, banks, and invests. Youll work with cutting-edge technologies to develop, implement, and support scalable software applications that power financial ecosystems globally. About the Team - Youll join a dynamic, cross-functional team of engineers, analysts, and product experts focused on delivering high-pe
        Full time - Experienced (relevant combo of work and education) Bachelor of Computer Science - 15 - 25% Every day, our teams innovate across the world of finance. We collaborate to work smarter, while making a difference. We believe in diversity and inclusivity, giving a voice to everyone on the team. And we celebrate our success together. If you want to make an impact in fintech, wed like to know: Are you FIS? As a Programmer Analyst at FIS, youll be at the forefront of fintech innovationdesigning and building next-generation solutions that redefine how the world pays, banks, and invests. Youll work with cutting-edge technologies to develop, implement, and support scalable software applications that power financial ecosystems globally. About the Team - Youll join a dynamic, cross-functional team of engineers, analysts, and product experts focused on delivering high-pe
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        408 exact matches jobs are outside your preferred location

        Youll play a key role in running and evolving the banks Internal API Gateway platform a central service enabling secure, efficient, and scalable connectivity across the enterprise. * Act as a technical ambassador for our Internal API Gateway platform. * Join a small global SRE team managing the reliability and performance of the API platform. * Experience with Tyk API Gateway or similar API management platforms. * Work on a large-scale API ecosystem thats mission-critical to digital transformation.
        Youll play a key role in running and evolving the banks Internal API Gateway platform a central service enabling secure, efficient, and scalable connectivity across the enterprise. * Act as a technical ambassador for our Internal API Gateway platform. * Join a small global SRE team managing the reliability and performance of the API platform. * Experience with Tyk API Gateway or similar API management platforms. * Work on a large-scale API ecosystem thats mission-critical to digital transformation.
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        Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. * Experience with AI/ML frameworks such as TensorFlow, PyTorch, OpenAI API, or LangChain. * Strong understanding of API design, including REST, GraphQL, and WebSockets.
        Utilize AWS services (Lambda, S3, API Gateway, SageMaker, DynamoDB, ECS, etc.) to deploy scalable AI solutions. * Experience with AI/ML frameworks such as TensorFlow, PyTorch, OpenAI API, or LangChain. * Strong understanding of API design, including REST, GraphQL, and WebSockets.
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        Power Platform Developer

        Hays
        London
        £500.0 - £550.0 per day + up to £550 pd (Inside IR35)
        Awareness of Dataverse API
        Awareness of Dataverse API
        NEW
        The ideal candidate combines technical expertise in software integration with a strong understanding of AI/ML deployment workflows and API-based architectures.
        The ideal candidate combines technical expertise in software integration with a strong understanding of AI/ML deployment workflows and API-based architectures.
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        NEW
        The Azure DevOps Engineer will design, build, and maintain CI/CD pipelines to support the API backbone and other digital initiatives. * Contribute to the ongoing development of a scalable, resilient digital API infrastructure. * Familiarity with API-driven architectures, microservices, and integration patterns.
        The Azure DevOps Engineer will design, build, and maintain CI/CD pipelines to support the API backbone and other digital initiatives. * Contribute to the ongoing development of a scalable, resilient digital API infrastructure. * Familiarity with API-driven architectures, microservices, and integration patterns.
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        Azure Cosmos DB Developer

        Infoplus Technologies UK Ltd
        London
        From £450 to £500 per day
        This role involves architecting 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. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
        This role involves architecting 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. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
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        NEW
        Maintain and troubleshoot the custom C# .NET backend API used as a wrapper for Contentful CMS. * API Gateway * Solid expertise in C# .NET, particularly in API development and integration. * Familiarity with Contentful CMS and API integration.
        Maintain and troubleshoot the custom C# .NET backend API used as a wrapper for Contentful CMS. * API Gateway * Solid expertise in C# .NET, particularly in API development and integration. * Familiarity with Contentful CMS and API integration.
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        NEW
        Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
        Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
        more
        NEW

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        Frequently Asked Questions

        How many contract API jobs are there in Brentwood?
        There are 29 contract API jobs within 20 miles of Brentwood available on CWJobs right now.

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