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        • City of London

        130 API jobs in Hatfield + 20 miles

        Dynamics 365 developer

        IBU CONSULTING LTD
        Gilwell Park, E4 7FH
        Unspecified
        Perform Dataverse customizations, SQL queries, and CRUD operations using REST/Web API calls. * JavaScript (customizations & API calls)
        Perform Dataverse customizations, SQL queries, and CRUD operations using REST/Web API calls. * JavaScript (customizations & API calls)
        more
        NEW

        .NET Developer

        Tech 4
        EC1, City of London
        From £60,000 to £70,000 per annum + excellent benefits
        C#, ASP.NET MVC, Web Services/ASP.NET Web API , REST API Asp.Net Core MS SQL server /PostgreSQL Entity Framework /LINQ Knowledge of ASP.NET Core and Client-side Frameworks (jQuery, Angular) Azure DevOps, Git repository and CI/CD Docker/Kubernetes Linux/Micro-Services Architecture - Experience planning and mapping out API integrations.
        C#, ASP.NET MVC, Web Services/ASP.NET Web API , REST API Asp.Net Core MS SQL server /PostgreSQL Entity Framework /LINQ Knowledge of ASP.NET Core and Client-side Frameworks (jQuery, Angular) Azure DevOps, Git repository and CI/CD Docker/Kubernetes Linux/Micro-Services Architecture - Experience planning and mapping out API integrations.
        more
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
        Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
        more
        NEW

        Data Engineer

        Singular Recruitment
        W1, Central London
        From £50,000 to £70,000 per annum
        API Development:Experience building data-centric APIs, especially withFastAPIon serverless platforms likeGoogle App Engine.
        API Development:Experience building data-centric APIs, especially withFastAPIon serverless platforms likeGoogle App Engine.
        more

        Senior Penetration Tester

        COMPUTACENTER (UK) LIMITED
        SE1, South East London
        Unspecified
        Conduct comprehensive penetration tests: Execute internal and external network penetration tests, web application penetration tests, mobile application penetration tests, API penetration tests, cloud security assessments, and social engineering simulations.
        Conduct comprehensive penetration tests: Execute internal and external network penetration tests, web application penetration tests, mobile application penetration tests, API penetration tests, cloud security assessments, and social engineering simulations.
        more

        Software Developer-MS-Stack

        Solus Accident Repair Centres
        North London, London
        GBP £35,000.00/Yr. - GBP £50,000.00/Yr.
        Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
        Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
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        NEW
        Strong understanding of Vue 3, Composition API, Pinia.
        Strong understanding of Vue 3, Composition API, Pinia.
        PREMIUM

        Global Claims IT Leader

        MARSH CORPORATE SERVICES LIMITED
        The City, EC3R 5BU
        Pension Scheme, Private Health Insurance & life insurance
        Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
        Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
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        NEWPREMIUM

        Senior MVC Developer

        Southern Communications Ltd
        HP2, Hemel Hempstead
        £75,000 per annum
        Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
        Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
        more
        NEW
        Build and work with modern API and microservices architectures
        Build and work with modern API and microservices architectures
        NEW

        Senior Full Stack Web Developer - ONSITE

        Profile 29
        IG10, Loughton
        From £70,000 to £120,000 per annum + benefits (see advert)
        As a member of their team, you will have the opportunity to work on their public-facing API and back-office websites in a Test-Driven Agile environment.
        As a member of their team, you will have the opportunity to work on their public-facing API and back-office websites in a Test-Driven Agile environment.
        more
        Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
        Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
        more
        NEW

        Solutions Architect

        Wilson Brown Limited
        EC1, City of London
        Up to £116,000 per annum + Bonus
        Client Solutions Architect - Salary: Up to £116K + Bonus - Location: London 2 days per week - Were hiring a Solutions Architect for a global leader in loyalty and customer engagement. This is a high-impact, client-facing role for someone who thrives at the intersection of strategy, software engineering, and stakeholder collaboration. Youll partner directly with enterprise clients to shape technical strategy, design scalable solutions, and build innovative integrations. Whether in pre-sales or delivery, your work will blend commercial impact with technical excellence. This isnt a hands-off role were looking for a hands-on Engineer turned Solutions Architect who still loves to code. Youll lead from the front, whether its building PoCs, architecting systems across modern stacks (TypeScript, AWS, Kubernetes), or aligning with internal engineering teams to deliver real cli
        Client Solutions Architect - Salary: Up to £116K + Bonus - Location: London 2 days per week - Were hiring a Solutions Architect for a global leader in loyalty and customer engagement. This is a high-impact, client-facing role for someone who thrives at the intersection of strategy, software engineering, and stakeholder collaboration. Youll partner directly with enterprise clients to shape technical strategy, design scalable solutions, and build innovative integrations. Whether in pre-sales or delivery, your work will blend commercial impact with technical excellence. This isnt a hands-off role were looking for a hands-on Engineer turned Solutions Architect who still loves to code. Youll lead from the front, whether its building PoCs, architecting systems across modern stacks (TypeScript, AWS, Kubernetes), or aligning with internal engineering teams to deliver real cli
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        Frequently Asked Questions

        How many API jobs are there in Hatfield?
        There are 130 API jobs within 20 miles of Hatfield available on CWJobs right now.

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