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        151 API jobs in Hatfield + 20 miles

        670 exact matches jobs are outside your preferred location

        .Net Engineer

        JLA Resourcing Ltd
        Hounslow (TW3)
        £475 to £525pd
        Role - .Net Engineer - Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 - Rate - £475 to £525 per day - Start - ASAP - This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity - We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
        Role - .Net Engineer - Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 - Rate - £475 to £525 per day - Start - ASAP - This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity - We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
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        Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
        Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
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        Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
        Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
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        Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
        Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
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        NEW

        Solution Architect - (HCM) SC Cleared

        Henderson Scott
        London
        £700 - £800 per day + Umbrella rate (inside IR35)
        Solution Architect - Active SC Cleared - Location: Hybrid (20% in London or Glasgow) | Engagement: Contract - Inside IR35 | Duration: Initial 6 Months | Clearance: SC Clearance Essential - Our client requires a high-calibre Solution Architect with extensive HCM (Workday / Oracle HCM / Successfactors) experince to establish and deliver the integrations sub-workstream from the ground up. This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery - You will report directly to the Senior Technical Delivery Manager, acting as the primary authority for all Workday integration design and delivery. * Integration Strategy: Define, develop, and own the Workday integration strategy and road
        Solution Architect - Active SC Cleared - Location: Hybrid (20% in London or Glasgow) | Engagement: Contract - Inside IR35 | Duration: Initial 6 Months | Clearance: SC Clearance Essential - Our client requires a high-calibre Solution Architect with extensive HCM (Workday / Oracle HCM / Successfactors) experince to establish and deliver the integrations sub-workstream from the ground up. This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery - You will report directly to the Senior Technical Delivery Manager, acting as the primary authority for all Workday integration design and delivery. * Integration Strategy: Define, develop, and own the Workday integration strategy and road
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        FEATURED
        Maintain a strong understanding of offensive and defensive practices, with particular focus on web, API, bot, DDoS, and AI-related threats * Strong grasp of common web, cloud, and API protocols and their associated attack surfaces (e.g., HTTP/S, REST, OAuth, DNS, TLS, etc.)
        Maintain a strong understanding of offensive and defensive practices, with particular focus on web, API, bot, DDoS, and AI-related threats * Strong grasp of common web, cloud, and API protocols and their associated attack surfaces (e.g., HTTP/S, REST, OAuth, DNS, TLS, etc.)
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        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
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        Salesforce Tech Lead

        Stackstudio Digital Ltd.
        Windsor (SL4)
        From £450 to £475 per day
        Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
        Job Title:Salesforce Tech Lead - Location:Windsor, UK (1 day a week) Job Purpose and Primary Objectives:Salesforce Tech Lead - Key Responsibilities (Please specify if the position is an individual one or part of a team) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving.
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        Salesforce Tech Lead

        Infoplus Technologies UK Ltd
        Windsor, Berkshire
        From £450 to £500 per day
        Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
        Windsor, UK - Will the role be 100% remote, Hybrid or 100% office? (Mandatory) Hybrid (visit to office once every week) to begin with - Is BGC required to completed before joining?(Y/N) * Participate in refining and scoping upcoming sprint work. * Assist solution architects with technical design and breaking down complex tasks. * Accountable for timely delivery of assigned tickets, meeting acceptance criteria. * Conduct spikes/investigations into innovative technologies for future project viability. * Ensure teammates' work meets code quality standards through reviews. * Coordinate with other teams for integrations, ensuring alignment of tasks and APIs. * Work with the QA team to investigate and resolve issues. * Mentor junior team members, providing assistance with tasks and problem-solving. * At least 5+ years Salesforce, both declarative and programmatic * Sales an
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        We are looking for Salesforce Architects (Solution and Technical) to help deliver next-gen solutions across Insurance & Financial Services. If you thrive on complex architecture, hands-on design, and steering clients toward best-practice cloud solutions we want to talk! Lead end-to-end Salesforce & SFI Insurance Cloud architecture Drive discovery sessions, technical design, and delivery excellence Guide dev teams, review code, and ensure solution quality Work across OmniStudio, Insurance Cloud, Health Cloud, FSC & Experience Cloud 8+ yrs technical leadership 5+ yrs Salesforce dev (Apex, LWC, APIs) Strong SFI Insurance Cloud experience (Quoting, Policy Admin, FNOL, Claims, etc.) Salesforce/SFI certifications This is a Hybrid contract inside IR 35 Apply now and architect the future!
        We are looking for Salesforce Architects (Solution and Technical) to help deliver next-gen solutions across Insurance & Financial Services. If you thrive on complex architecture, hands-on design, and steering clients toward best-practice cloud solutions we want to talk! Lead end-to-end Salesforce & SFI Insurance Cloud architecture Drive discovery sessions, technical design, and delivery excellence Guide dev teams, review code, and ensure solution quality Work across OmniStudio, Insurance Cloud, Health Cloud, FSC & Experience Cloud 8+ yrs technical leadership 5+ yrs Salesforce dev (Apex, LWC, APIs) Strong SFI Insurance Cloud experience (Quoting, Policy Admin, FNOL, Claims, etc.) Salesforce/SFI certifications This is a Hybrid contract inside IR 35 Apply now and architect the future!
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        Experience with AWS - AWS API, EC2, S3, RDS, Lambda, Route53, VPC, CloudFront, CloudWatch, IAM, ADFS, Elastic Cache, Microservices, Elastic Beanstalk
        Experience with AWS - AWS API, EC2, S3, RDS, Lambda, Route53, VPC, CloudFront, CloudWatch, IAM, ADFS, Elastic Cache, Microservices, Elastic Beanstalk
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        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
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        Senior JavaScript Developer Vue 3

        Client Server
        Arundel Heights, Billericay (CM12), CM12 0EQ
        £65000 - £75000 per annum
        Senior JavaScript Developer / front End Engineer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. * Salary (to £75k) * Bonus * 25 days holiday * Pension * Life assurance * Private medical care * Pizza days and other social events * Hybrid working with flexible hours - As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the
        Senior JavaScript Developer / front End Engineer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. * Salary (to £75k) * Bonus * 25 days holiday * Pension * Life assurance * Private medical care * Pizza days and other social events * Hybrid working with flexible hours - As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the
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        NEWPREMIUM
        MS Power Platform Developer with AI Chatbot - Location: Esher (two days WFH) Salary: c.£50K - £60K - This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power
        MS Power Platform Developer with AI Chatbot - Location: Esher (two days WFH) Salary: c.£50K - £60K - This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power
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        LSEG is seeking a skilled Real-Time Cloud Architect to design, build, and maintain cloud-based solutions to facilitate low latency distribution of real-time content. The ideal candidate will have extensive experience with Azure and AWS cloud platforms and collaborating with multi-functional teams to architect scalable, secure and highly performant solutions. Designing and implementing real-time distribution solutions applying Azure and AWS cloud-native services. Migrating existing on-prem applications to Azure and AWS cloud. Remediating solutions to meet RPO (Recovery Point Objective) and RTO (Recovery Time Objective) targets. Participate in technical governance reviews and ensure alignment to standards. Conduct feasibility studies and recommend technology stacks. Developing and implementing strategies to enhance cloud financial management (FinOps).
        LSEG is seeking a skilled Real-Time Cloud Architect to design, build, and maintain cloud-based solutions to facilitate low latency distribution of real-time content. The ideal candidate will have extensive experience with Azure and AWS cloud platforms and collaborating with multi-functional teams to architect scalable, secure and highly performant solutions. Designing and implementing real-time distribution solutions applying Azure and AWS cloud-native services. Migrating existing on-prem applications to Azure and AWS cloud. Remediating solutions to meet RPO (Recovery Point Objective) and RTO (Recovery Time Objective) targets. Participate in technical governance reviews and ensure alignment to standards. Conduct feasibility studies and recommend technology stacks. Developing and implementing strategies to enhance cloud financial management (FinOps).
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        Senior Python Developer Team Lead - Location:Remote (UK-based) Salary:£55,000 £62,000 per annum - Were recruiting on behalf of our client who are in EdTech supporting schools across the UK. The business develops cloud-based solutions that help schools use technology and data to improve outcomes. They are looking for aSenior Python Developerwith Team Lead experience to join their engineering team. Youll lead development, set technical standards and support the delivery of scalable, cloud-native products. Main Duties of the Role * Lead the design and development of scalable Python applications * Provide technical leadership within an Agile environment * Design and maintain AWS-based systems using Infrastructure-as-Code * Set best practices across development, testing and deployment * Mentor developers and contribute to technical innovation - Your Skills and Experience
        Senior Python Developer Team Lead - Location:Remote (UK-based) Salary:£55,000 £62,000 per annum - Were recruiting on behalf of our client who are in EdTech supporting schools across the UK. The business develops cloud-based solutions that help schools use technology and data to improve outcomes. They are looking for aSenior Python Developerwith Team Lead experience to join their engineering team. Youll lead development, set technical standards and support the delivery of scalable, cloud-native products. Main Duties of the Role * Lead the design and development of scalable Python applications * Provide technical leadership within an Agile environment * Design and maintain AWS-based systems using Infrastructure-as-Code * Set best practices across development, testing and deployment * Mentor developers and contribute to technical innovation - Your Skills and Experience
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        AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
        AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
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        AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
        AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
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        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
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        Frequently Asked Questions

        How many API jobs are there in Hatfield?
        There are 151 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 Software Developer, Automation, Azure, amongst many others.