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        5 Contract API jobs in Cardiff + 20 miles

        Lead Developer

        Intellectual Property Office
        Newport (NP10)
        From £66,162 to £77,888 per annum £19,167 towards membership of the C
        Pleasenote:Applicants should review all aspects of this advert to ensure a thorough understanding. If reviewing via a screen reader, please note that the Job summary, Job description, Person specification, Benefits and Things you need to know sections have been emphasised - The IPO is an organisation which depends on its IT services to operate and innovate effectively. To provide up to date services to our customers, systems need to be developed, improved and maintained. This position plays a key role in ensuring the Legacy Existing Systems vertical within IT, continues to be able to support these aging and complex legacy systems. This is a challenging role as the post holder must be able to balance complex maintenance commitments of the legacy estate with new initiatives, and conflicting demands.
        Pleasenote:Applicants should review all aspects of this advert to ensure a thorough understanding. If reviewing via a screen reader, please note that the Job summary, Job description, Person specification, Benefits and Things you need to know sections have been emphasised - The IPO is an organisation which depends on its IT services to operate and innovate effectively. To provide up to date services to our customers, systems need to be developed, improved and maintained. This position plays a key role in ensuring the Legacy Existing Systems vertical within IT, continues to be able to support these aging and complex legacy systems. This is a challenging role as the post holder must be able to balance complex maintenance commitments of the legacy estate with new initiatives, and conflicting demands.
        more
        We are seeking experienced Full Stack TypeScript Developer to join our team and help build innovative, cross-platform applications using a unified architecture. You'll work across the stack - developing responsive frontends in React, building robust RESTful/GraphQL APIs with Node.js and Fastify, and creating desktop/mobile apps using Electron and React Native. Our unified approach ensures code reusability and consistency across all platforms. Familiarity with XSL for data transformation is a plus. We're especially keen to hear from candidates who have real-world experience with vibe coding - using AI tools like Claude, Cursor, or CoPilot to build production-grade software faster and smarter. This is a remote job with regular travel to Bristol. About Contenta - Contenta is part of RWSs content management platform focused on the Aerospace & Defence market.
        We are seeking experienced Full Stack TypeScript Developer to join our team and help build innovative, cross-platform applications using a unified architecture. You'll work across the stack - developing responsive frontends in React, building robust RESTful/GraphQL APIs with Node.js and Fastify, and creating desktop/mobile apps using Electron and React Native. Our unified approach ensures code reusability and consistency across all platforms. Familiarity with XSL for data transformation is a plus. We're especially keen to hear from candidates who have real-world experience with vibe coding - using AI tools like Claude, Cursor, or CoPilot to build production-grade software faster and smarter. This is a remote job with regular travel to Bristol. About Contenta - Contenta is part of RWSs content management platform focused on the Aerospace & Defence market.
        more

        Data Engineer

        PA Consulting Group Holdings Limited
        Cardiff, South Glamorgan
        Competitive
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
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        Technical Visionary: Strong knowledge of cloud architectures (Azure, AWS or GCP), microservices, API development, and modern development frameworks.
        Technical Visionary: Strong knowledge of cloud architectures (Azure, AWS or GCP), microservices, API development, and modern development frameworks.
        more

        104 exact matches jobs are outside your preferred location

        TypeScript - strongly typed, enterprise-grade API development
        TypeScript - strongly typed, enterprise-grade API development
        FEATURED

        Node.JS Developer (SC Cleared)

        Sanderson Government and Defence
        Corsham, Wiltshire, BBTE
        £500 - £550 per day + Inside IR35
        SC Cleared Node.js Developer - Location: Fully Remote (UK-based only) Contract Type: Contract (Inside IR35) Day Rate: £500-£550/day - Clearance Required: Active SC Clearance - Duration: Until 31/03/2025 - Sector: Defence / Government - Role Overview - We are seeking a highly skilled and security-cleared Node.js Developer to join a long-term government programme within the UK defence sector. This role involves designing, developing, and maintaining secure back-end services and APIs using Node.js and modern cloud technologies. You'll work as part of a collaborative agile team delivering scalable solutions that support national security objectives. Key Responsibilities * Develop and maintain back-end services using Node.js and Express.js * Write clean, testable, and efficient code following best practices * Ensure systems are secure, scalable, and compliant with defence
        SC Cleared Node.js Developer - Location: Fully Remote (UK-based only) Contract Type: Contract (Inside IR35) Day Rate: £500-£550/day - Clearance Required: Active SC Clearance - Duration: Until 31/03/2025 - Sector: Defence / Government - Role Overview - We are seeking a highly skilled and security-cleared Node.js Developer to join a long-term government programme within the UK defence sector. This role involves designing, developing, and maintaining secure back-end services and APIs using Node.js and modern cloud technologies. You'll work as part of a collaborative agile team delivering scalable solutions that support national security objectives. Key Responsibilities * Develop and maintain back-end services using Node.js and Express.js * Write clean, testable, and efficient code following best practices * Ensure systems are secure, scalable, and compliant with defence
        more
        FEATURED

        Node.JS Developer

        Sanderson Government and Defence
        Corsham, Wiltshire, BBTE
        £500 - £550 per day + Inside IR35
        SC Cleared Node.js Developer - Location: Fully Remote (UK-based only) Contract Type: Contract (Inside IR35) Day Rate: £500-£550/day - Clearance Required: Active SC Clearance - Duration: Until 31/03/2025 - Sector: Defence / Government - Role Overview - We are seeking a highly skilled and security-cleared Node.js Developer to join a long-term government programme within the UK defence sector. This role involves designing, developing, and maintaining secure back-end services and APIs using Node.js and modern cloud technologies. You'll work as part of a collaborative agile team delivering scalable solutions that support national security objectives. Key Responsibilities * Develop and maintain back-end services using Node.js and Express.js * Write clean, testable, and efficient code following best practices * Ensure systems are secure, scalable, and compliant with defence
        SC Cleared Node.js Developer - Location: Fully Remote (UK-based only) Contract Type: Contract (Inside IR35) Day Rate: £500-£550/day - Clearance Required: Active SC Clearance - Duration: Until 31/03/2025 - Sector: Defence / Government - Role Overview - We are seeking a highly skilled and security-cleared Node.js Developer to join a long-term government programme within the UK defence sector. This role involves designing, developing, and maintaining secure back-end services and APIs using Node.js and modern cloud technologies. You'll work as part of a collaborative agile team delivering scalable solutions that support national security objectives. Key Responsibilities * Develop and maintain back-end services using Node.js and Express.js * Write clean, testable, and efficient code following best practices * Ensure systems are secure, scalable, and compliant with defence
        more
        FEATURED

        Backend Developer

        Stackstudio Digital Ltd.
        Bristol (BS1)
        From £450 to £460 per day
        Work Location: Bristol (2days) Essential Skills / Knowledge / Experience * Extensive knowledge of writing secure scalable enterprise-grade Go applications * Experience of REST APIs, containerisation technologies, micro-services architecture * Ability to work collaboratively within a team as well as independently * Excellent analytical, problem solving, and strategic thinking skills * In depth knowledge of best coding practices, code management, agile development practices and continuous delivery * Understand how to performance optimise and fine tune backend applications to meet demanding NFRs - Desirable Skills / Knowledge / Experience * Experience of JAVA development * Experience with cryptography frameworks in Go and JAVA * Experience with SQL databases * Experience and/or interest in application security and/or mobile app security
        Work Location: Bristol (2days) Essential Skills / Knowledge / Experience * Extensive knowledge of writing secure scalable enterprise-grade Go applications * Experience of REST APIs, containerisation technologies, micro-services architecture * Ability to work collaboratively within a team as well as independently * Excellent analytical, problem solving, and strategic thinking skills * In depth knowledge of best coding practices, code management, agile development practices and continuous delivery * Understand how to performance optimise and fine tune backend applications to meet demanding NFRs - Desirable Skills / Knowledge / Experience * Experience of JAVA development * Experience with cryptography frameworks in Go and JAVA * Experience with SQL databases * Experience and/or interest in application security and/or mobile app security
        more
        At Evodia Limited, we are proud to partner with a leading defence organisation seeking a highly capable PNT Systems Engineer with current SC security clearance. This is an exciting opportunity to contribute to critical defence projects that support national security and operational excellence. Role Overview - This contract position offers a hybrid working arrangement, with onsite presence required in Bristol once per week.. The role involves delivering key Navigation & Timing (PNT) projects, providing subject matter expertise, and supporting operational activities. The successful candidate will work under the supervision of a PI Programme Manager and PI Engineering Manager, contributing to the design, verification, and documentation of electronic systems and sensors integral to defence applications. Key Responsibilities
        At Evodia Limited, we are proud to partner with a leading defence organisation seeking a highly capable PNT Systems Engineer with current SC security clearance. This is an exciting opportunity to contribute to critical defence projects that support national security and operational excellence. Role Overview - This contract position offers a hybrid working arrangement, with onsite presence required in Bristol once per week.. The role involves delivering key Navigation & Timing (PNT) projects, providing subject matter expertise, and supporting operational activities. The successful candidate will work under the supervision of a PI Programme Manager and PI Engineering Manager, contributing to the design, verification, and documentation of electronic systems and sensors integral to defence applications. Key Responsibilities
        more
        Knowledge of architectural patterns and best practices for software integration, such as Service-Oriented Architecture (SOA), Microservices, Enterprise Service Bus (ESB), Application Programming Interface (API) design, etc.
        Knowledge of architectural patterns and best practices for software integration, such as Service-Oriented Architecture (SOA), Microservices, Enterprise Service Bus (ESB), Application Programming Interface (API) design, etc.
        more

        Data Engineer

        PA Consulting Group Holdings Limited
        Bristol, Avon
        Competitive
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
        more
        Were Civica, and we create software that helps deliver critical services for citizens all around the world. From local government, to education, health, and care, over 5,000 public bodies across the globe use our software to provide essential services to over 100 million citizens. Our aspiration is to be a GovTech champion everywhere we work, supporting the needs of citizens and those who serve them every day. Building on 21 years of continuous growth and success, we're at a pivotal point in our journey to realise that aspiration. Why you will love this opportunity as Technical Consultant at Civica - Its an essential role in the Civica LG Division Services Team, working across a range of products and customers in the portfolio to deliver professional services consultancy on several concurrent projects.
        Were Civica, and we create software that helps deliver critical services for citizens all around the world. From local government, to education, health, and care, over 5,000 public bodies across the globe use our software to provide essential services to over 100 million citizens. Our aspiration is to be a GovTech champion everywhere we work, supporting the needs of citizens and those who serve them every day. Building on 21 years of continuous growth and success, we're at a pivotal point in our journey to realise that aspiration. Why you will love this opportunity as Technical Consultant at Civica - Its an essential role in the Civica LG Division Services Team, working across a range of products and customers in the portfolio to deliver professional services consultancy on several concurrent projects.
        more

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        What is the average salary for API in Cardiff?

        Average salary per year
        £42,499

        The average salary for a API in Cardiff is £42,499. API in Cardiff salaries range from £32,499 to £55,000.

        Frequently Asked Questions

        How many contract API jobs are there in Cardiff?
        There are 5 contract API jobs within 20 miles of Cardiff available on CWJobs right now.

        What other similar jobs are there to contract API jobs in Cardiff?
        As well as contract API jobs in Cardiff, you can find contract Qa Automation, Quality Assurance, QA Analyst, amongst many others.