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        10 Permanent API jobs in Cardiff + 20 miles

        Senior Full Stack Developer (PL/SQL/ColdFusion)

        Method-Resourcing
        Newport (NP1), NP1
        £50000 - £55000 per annum
        Experience with API development and integration (RESTful services)
        Experience with API development and integration (RESTful services)
        FEATURED
        We are now looking for a Automation Tester to to design, implement, and maintain automated UI and API tests supporting continuous deployment.
        We are now looking for a Automation Tester to to design, implement, and maintain automated UI and API tests supporting continuous deployment.
        more

        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
        The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface. * Data & API Work: SQL for data access, JSON/XML for data interchange, and basic JavaScript/TypeScript understanding for API or UI integration contexts. * Experience troubleshooting complex API and connectivity issues.
        The deployment environment varies, sometimes the 3rd party products are "on prem" with a libraries approach or it might be a Cloud based deployment with a RESTful API as the interface. * Data & API Work: SQL for data access, JSON/XML for data interchange, and basic JavaScript/TypeScript understanding for API or UI integration contexts. * Experience troubleshooting complex API and connectivity issues.
        more
        Web Services, API, XML, XSLT, .Net, SQL, SOAP, REST
        Web Services, API, XML, XSLT, .Net, SQL, SOAP, REST
        NEW
        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.
        more

        95 exact matches jobs are outside your preferred location

        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

        Software Team Lead

        ZENOVO LTD
        Beeches Industrial Estate, Bristol (BS37), BS37 5JF
        Up to £80,000 (Depending on Experience)
        Job Title: Software Team Lead - Location: Yate, North Bristol (2/3 Days On-Site Per Week) Salary: Up to £80,000 (Depending on Experience) We’re seeking a Software Team Lead to oversee the design, development, and deployment of innovative software solutions while mentoring and guiding a team of skilled engineers. This role combines strategic technical leadership with hands-on development, ensuring engineering excellence and seamless project delivery. My client develops Energy Management & Storage Systems that ensure the reliable and secure operation of critical energy infrastructure. • Edge control software for real-time decision-making • Centralised data infrastructure to collect, store, and analyse system information • User-facing tools that visualise and interact with live power system operations - In this role, you’ll work across the full technology stack — from em
        Job Title: Software Team Lead - Location: Yate, North Bristol (2/3 Days On-Site Per Week) Salary: Up to £80,000 (Depending on Experience) We’re seeking a Software Team Lead to oversee the design, development, and deployment of innovative software solutions while mentoring and guiding a team of skilled engineers. This role combines strategic technical leadership with hands-on development, ensuring engineering excellence and seamless project delivery. My client develops Energy Management & Storage Systems that ensure the reliable and secure operation of critical energy infrastructure. • Edge control software for real-time decision-making • Centralised data infrastructure to collect, store, and analyse system information • User-facing tools that visualise and interact with live power system operations - In this role, you’ll work across the full technology stack — from em
        more
        About Graphcore - Graphcore is one of the worlds leading innovators in Artificial Intelligence compute. It is developing hardware, software and systems infrastructure that will unlock the next generation of AI breakthroughs and power the widespread adoption of AI solutions across every industry. As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for some of the worlds most transformative technologies. Together, they share a bold vision: to enable Artificial Super Intelligence and ensure its benefits are accessible to everyone. Graphcores teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives. A melting pot of AI research specialists, silicon designers, software engineers and systems architects, Graphcore enjoys a culture of continuous learning and constant innovation. Job Summary
        About Graphcore - Graphcore is one of the worlds leading innovators in Artificial Intelligence compute. It is developing hardware, software and systems infrastructure that will unlock the next generation of AI breakthroughs and power the widespread adoption of AI solutions across every industry. As part of the SoftBank Group, Graphcore is a member of an elite family of companies responsible for some of the worlds most transformative technologies. Together, they share a bold vision: to enable Artificial Super Intelligence and ensure its benefits are accessible to everyone. Graphcores teams are drawn from diverse backgrounds and bring a broad range of skills and perspectives. A melting pot of AI research specialists, silicon designers, software engineers and systems architects, Graphcore enjoys a culture of continuous learning and constant innovation. Job Summary
        more

        Senior Software Engineer (Pensions, ISAs & Investments)

        Hargreaves Lansdown
        Bristol (BS1)
        £65000 - £80000 per annum + Strong Bonus & Pension etc
        Salary: Up to £80,000 dependent on experience - HL are looking for a talented full stack Senior Software Engineer to join our Pensions, ISAs & Investments product development team in building market leading solutions for our clients. This is an opportunity to join the UK's number one investment services company, looking after over £149.7bn billion in assets on behalf of more than 1.86 million UK investors. This is your chance to genuinely stamp your mark on one of the UK's most innovative and digital-focused businesses. What You'll Be Doing * Collaborate with cross-functional teams to deliver high-quality digital client journeys. * Design and develop AWS cloud-native applications with TypeScript and React and manage them using Infrastructure as Code. * Write high quality, secure, tested and performant code. * Create and maintain automated tests for new changes.
        Salary: Up to £80,000 dependent on experience - HL are looking for a talented full stack Senior Software Engineer to join our Pensions, ISAs & Investments product development team in building market leading solutions for our clients. This is an opportunity to join the UK's number one investment services company, looking after over £149.7bn billion in assets on behalf of more than 1.86 million UK investors. This is your chance to genuinely stamp your mark on one of the UK's most innovative and digital-focused businesses. What You'll Be Doing * Collaborate with cross-functional teams to deliver high-quality digital client journeys. * Design and develop AWS cloud-native applications with TypeScript and React and manage them using Infrastructure as Code. * Write high quality, secure, tested and performant code. * Create and maintain automated tests for new changes.
        more
        FEATURED

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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 permanent API jobs are there in Cardiff?
        There are 10 permanent API jobs within 20 miles of Cardiff available on CWJobs right now.

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