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        154 Contract API jobs in Hayes + 20 miles

        672 exact matches jobs are outside your preferred location

        Manager – Principal Security Architect Secure Design (IC)

        London Stock Exchange
        London
        Competitive
        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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        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
        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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        Principal Software Engineer - Unified Client Experience (UCX)

        Hargreaves Lansdown
        London
        £11500 - £90000 per annum + Generous bonus, pension, PMI & more
        Deep expertise in React or React Native, with hands-on experience in secure API integration, authentication flows, and frontend architecture.
        Deep expertise in React or React Native, with hands-on experience in secure API integration, authentication flows, and frontend architecture.
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        FEATURED
        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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        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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        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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        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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        PREMIUM
        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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        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
        more
        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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        This is a great time for a talented full-stack C# Software Developer, with skills in both web and desktop development to join an established, niche software house, based just outside Witney, West Oxfordshire. The Role - The C# Software Developer will be joining a company that is well-established with a strong product range (mission-critical, browser and desktop-based software developed predominantly in C#, ASP.NET MVC, .NET Core, JavaScript and SQL Server) used by market leading companies across the globe. In addition to adding new functionality, the C# Software Developer will design, build, and maintain production-grade services, including defining APIs, implementing business logic, managing data access, and ensuring reliability through monitoring, logging, testing, and deployment. Working fully onsite in beautiful offices in the heart of the countryside, the C# Soft
        This is a great time for a talented full-stack C# Software Developer, with skills in both web and desktop development to join an established, niche software house, based just outside Witney, West Oxfordshire. The Role - The C# Software Developer will be joining a company that is well-established with a strong product range (mission-critical, browser and desktop-based software developed predominantly in C#, ASP.NET MVC, .NET Core, JavaScript and SQL Server) used by market leading companies across the globe. In addition to adding new functionality, the C# Software Developer will design, build, and maintain production-grade services, including defining APIs, implementing business logic, managing data access, and ensuring reliability through monitoring, logging, testing, and deployment. Working fully onsite in beautiful offices in the heart of the countryside, the C# Soft
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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
        more
        Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
        Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
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        FEATURED
        What if the work you did every day could impact the lives of people you know? Or all of humanity? At Illumina, we are expanding access to genomic technology to realize health equity for billions of people around the world. Our efforts enable life-changing discoveries that are transforming human health through the early detection and diagnosis of diseases and new treatment options for patients. Working at Illumina means being part of something bigger than yourself. Every person, in every role, has the opportunity to make a difference. Surrounded by extraordinary people, inspiring leaders, and world changing projects, you will do more and become more than you ever thought possible. Illumina Lab Services (ILS) has an exciting opportunity for an experienced software engineer to join the software and test team.
        What if the work you did every day could impact the lives of people you know? Or all of humanity? At Illumina, we are expanding access to genomic technology to realize health equity for billions of people around the world. Our efforts enable life-changing discoveries that are transforming human health through the early detection and diagnosis of diseases and new treatment options for patients. Working at Illumina means being part of something bigger than yourself. Every person, in every role, has the opportunity to make a difference. Surrounded by extraordinary people, inspiring leaders, and world changing projects, you will do more and become more than you ever thought possible. Illumina Lab Services (ILS) has an exciting opportunity for an experienced software engineer to join the software and test team.
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        NEW
        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 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.
        more
        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 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.
        more
        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 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.
        more
        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 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.
        more

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        Frequently Asked Questions

        How many contract API jobs are there in Hayes?
        There are 154 contract API jobs within 20 miles of Hayes available on CWJobs right now.

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