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        4 Contract API jobs in Cardiff + 10 miles

        Test Automation Engineer

        Queen Square Recruitment Limited
        CF1, Cardiff
        Unspecified
        Experience with API automation (Postman or similar).
        Experience with API automation (Postman or similar).
        NEW

        108 exact matches jobs are outside your preferred location

        Software Engineer

        Oscar Associates (UK) Limited
        BS1, Bristol
        £350 - £450 per day
        We're looking for a versatile Software Engineer to join a leading Bristol-based business, delivering high-quality solutions for clients across finance, e-commerce, and technology. This is a hands-on role where you'll work across the full stack. Back-end services in C#/.NET and Python, and dynamic front-end applications using JavaScript, React, Node.js, and TypeScript. Location: Bristol (Hybrid) Contract: 6 Months (OIR35) Rate: £350-450 p/day - Start date: ASAP * Build and maintain software using C#/.NET, Python, JavaScript, React, Node.js, and TypeScript * Develop and optimise APIs, services, and integration layers. * Deliver end-to-end features across back-end, front-end, and cloud-hosted environments. * Write clean, efficient, and maintainable code following best practices. * Contribute to code reviews, testing, and Agile ceremonies.
        We're looking for a versatile Software Engineer to join a leading Bristol-based business, delivering high-quality solutions for clients across finance, e-commerce, and technology. This is a hands-on role where you'll work across the full stack. Back-end services in C#/.NET and Python, and dynamic front-end applications using JavaScript, React, Node.js, and TypeScript. Location: Bristol (Hybrid) Contract: 6 Months (OIR35) Rate: £350-450 p/day - Start date: ASAP * Build and maintain software using C#/.NET, Python, JavaScript, React, Node.js, and TypeScript * Develop and optimise APIs, services, and integration layers. * Deliver end-to-end features across back-end, front-end, and cloud-hosted environments. * Write clean, efficient, and maintainable code following best practices. * Contribute to code reviews, testing, and Agile ceremonies.
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        NEWFEATURED

        Software Engineer

        JAM Recruitment Ltd
        Ashton, BS3 2HQ
        £650 - £745 per day + Umbrella, inside IR35
        Strong knowledge of API design, integration methods (REST, Webhooks, GraphQL), and authentication protocols (OAuth2, JWT).
        Strong knowledge of API design, integration methods (REST, Webhooks, GraphQL), and authentication protocols (OAuth2, JWT).
        more
        NEW
        Role Title: Senior QA Lead - Duration: contract to run until 31/03/2026 - Location: Bristol, hybrid 1 day per month onsite - Rate: up to £552 p/d Umbrella inside IR35 - Clearance required: Sole UK National (No Dual Nationalities) with Active SC Clearance - Role purpose / summary - This is an opportunity to join the team as a senior QA. We experiment with AI to improve platform availably and drive productivity benefits across the Client. Project Background - The incumbent tool used by the client predicts the availability of assets depending on the parameters inputted. The team has undergone a discovery piece of work to assess the effectiveness of the tool and to design what a new tool could look like. We determined that the entire application will need to be rebuilt which will include rebuilding the application infrastructure, the simulation model and the UI.
        Role Title: Senior QA Lead - Duration: contract to run until 31/03/2026 - Location: Bristol, hybrid 1 day per month onsite - Rate: up to £552 p/d Umbrella inside IR35 - Clearance required: Sole UK National (No Dual Nationalities) with Active SC Clearance - Role purpose / summary - This is an opportunity to join the team as a senior QA. We experiment with AI to improve platform availably and drive productivity benefits across the Client. Project Background - The incumbent tool used by the client predicts the availability of assets depending on the parameters inputted. The team has undergone a discovery piece of work to assess the effectiveness of the tool and to design what a new tool could look like. We determined that the entire application will need to be rebuilt which will include rebuilding the application infrastructure, the simulation model and the UI.
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        PREMIUM
        Role Title: Senior QA Lead - Duration: contract to run until 31/03/2026 - Location: Bristol, hybrid 1 day per month onsite - Rate: up to £570 p/d Umbrella inside IR35 - Clearance required: Sole UK National (No Dual Nationalities) with Active SC Clearance - Role purpose / summary - This is an opportunity to join the team as a senior QA. We experiment with AI to improve platform availably and drive productivity benefits across the Client. Project Background - The incumbent tool used by the client predicts the availability of assets depending on the parameters inputted. The team has undergone a discovery piece of work to assess the effectiveness of the tool and to design what a new tool could look like. We determined that the entire application will need to be rebuilt which will include rebuilding the application infrastructure, the simulation model and the UI.
        Role Title: Senior QA Lead - Duration: contract to run until 31/03/2026 - Location: Bristol, hybrid 1 day per month onsite - Rate: up to £570 p/d Umbrella inside IR35 - Clearance required: Sole UK National (No Dual Nationalities) with Active SC Clearance - Role purpose / summary - This is an opportunity to join the team as a senior QA. We experiment with AI to improve platform availably and drive productivity benefits across the Client. Project Background - The incumbent tool used by the client predicts the availability of assets depending on the parameters inputted. The team has undergone a discovery piece of work to assess the effectiveness of the tool and to design what a new tool could look like. We determined that the entire application will need to be rebuilt which will include rebuilding the application infrastructure, the simulation model and the UI.
        more
        PREMIUM
        Lead end-to-end system design, including API gateways, service orchestration, integration patterns (e.g., module federation, event-driven architecture), and distributed systems.
        Lead end-to-end system design, including API gateways, service orchestration, integration patterns (e.g., module federation, event-driven architecture), and distributed systems.
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        Description - Were building the next UK-headquartered engineering powerhouse. At Rowden, we design and integrate advanced systems that sense, connect, and protect data in challenging environments where quick decisions are vital. Our solutions use intelligent automation to enhance speed and efficiency and are built to be reliable and straightforward for critical operations in remote or high-pressure settings. Headquartered in Bristol (UK), we combine modern engineering methods with cutting-edge commercial technology to create adaptable, mission-critical systems. We focus on solving the tough challenges that others overlook, ensuring our customers can operate effectively in an ever-changing world. Were looking for an adaptable Software Engineer who thrives on solving real-world problems and is comfortable working across different domains.
        Description - Were building the next UK-headquartered engineering powerhouse. At Rowden, we design and integrate advanced systems that sense, connect, and protect data in challenging environments where quick decisions are vital. Our solutions use intelligent automation to enhance speed and efficiency and are built to be reliable and straightforward for critical operations in remote or high-pressure settings. Headquartered in Bristol (UK), we combine modern engineering methods with cutting-edge commercial technology to create adaptable, mission-critical systems. We focus on solving the tough challenges that others overlook, ensuring our customers can operate effectively in an ever-changing world. Were looking for an adaptable Software Engineer who thrives on solving real-world problems and is comfortable working across different domains.
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        Data Architect

        Independent Vetcare Ltd t/a Grove Lodge Veterinary Group
        Bristol, Avon
        Competitive
        Ready to shape the Future of Veterinary Care Through Data? At IVC Evidensia , were on a mission to improve the lives of animals and their owners by building the worlds best veterinary group. With over 2,500 locations globally, were investing in people, technology, and data to deliver exceptional care. Were undergoing a major digital transformation and data is at the heart of it. As our Data Architect , youll play a pivotal role in designing and delivering the data strategy that powers smarter decisions, enhances patient care, and enables cutting-edge AI initiatives. Why This Role Matters Youll be the technical authority driving how we manage and grow our data warehouse and BI capabilities. By aligning our data architecture with business goals, youll help unify insights across systems, improve reporting, and elevate the experience for our clients and their pets.
        Ready to shape the Future of Veterinary Care Through Data? At IVC Evidensia , were on a mission to improve the lives of animals and their owners by building the worlds best veterinary group. With over 2,500 locations globally, were investing in people, technology, and data to deliver exceptional care. Were undergoing a major digital transformation and data is at the heart of it. As our Data Architect , youll play a pivotal role in designing and delivering the data strategy that powers smarter decisions, enhances patient care, and enables cutting-edge AI initiatives. Why This Role Matters Youll be the technical authority driving how we manage and grow our data warehouse and BI capabilities. By aligning our data architecture with business goals, youll help unify insights across systems, improve reporting, and elevate the experience for our clients and their pets.
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        NEW
        Develop efficient data access patterns within our Python API to support application performance and scalability * Experience with event-driven design patterns and frontend state management (Redux, Context API)
        Develop efficient data access patterns within our Python API to support application performance and scalability * Experience with event-driven design patterns and frontend state management (Redux, Context API)
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        NEW
        About Swanky - Were Swanky, a fast-growing global ecommerce agency. We design, build and grow Shopify Plus stores that convert, and were expanding our expertise into mobile-first ecommerce experiences. If youve built mobile apps that engage customers, integrated with Shopify APIs, and want to be part of a team that creates seamless shopping journeys across devices, this could be just the role for you. About the Role - This is a Mobile App Developer (Flutter + Shopify) role. Applicants are expected to have strong commercial experience building cross-platform mobile applications in Flutter, combined with solid experience delivering Shopify storefronts, apps or integrations. Youll work with our developers, designers, analysts and project managers to create connected, mobile-first ecommerce solutions. From architecting new apps to integrating Shopify APIs into mobile expe
        About Swanky - Were Swanky, a fast-growing global ecommerce agency. We design, build and grow Shopify Plus stores that convert, and were expanding our expertise into mobile-first ecommerce experiences. If youve built mobile apps that engage customers, integrated with Shopify APIs, and want to be part of a team that creates seamless shopping journeys across devices, this could be just the role for you. About the Role - This is a Mobile App Developer (Flutter + Shopify) role. Applicants are expected to have strong commercial experience building cross-platform mobile applications in Flutter, combined with solid experience delivering Shopify storefronts, apps or integrations. Youll work with our developers, designers, analysts and project managers to create connected, mobile-first ecommerce solutions. From architecting new apps to integrating Shopify APIs into mobile expe
        more
        What you'll be doing - We're looking for a Finance Systems Project Lead to guide the implementation, integration, and optimization of financial systems, leading on projects from conception through to delivery, ensuring agreement on strategic goals and stakeholder requirements. Through collaboration with the Head of Finance Systems, you will build the finance vision through coordination of projects, mapping each integration to the transformation strategy. Following approved requirements and specifications you will also oversee integration projects across existing financial systems and leading end-to-end implementation of new financial systems. Experience that will put you ahead of the curve * Part Qualified or Qualified CIMA/ACCA * Experience as a Netsuite System Administrator. * Experience in systems and project management.
        What you'll be doing - We're looking for a Finance Systems Project Lead to guide the implementation, integration, and optimization of financial systems, leading on projects from conception through to delivery, ensuring agreement on strategic goals and stakeholder requirements. Through collaboration with the Head of Finance Systems, you will build the finance vision through coordination of projects, mapping each integration to the transformation strategy. Following approved requirements and specifications you will also oversee integration projects across existing financial systems and leading end-to-end implementation of new financial systems. Experience that will put you ahead of the curve * Part Qualified or Qualified CIMA/ACCA * Experience as a Netsuite System Administrator. * Experience in systems and project management.
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        Were looking for a Senior Solutions Engineer to lead the charge on complex, high-impact Shopify Plus builds. Youll translate bold ideas into bulletproof architecture blending technical expertise, ecommerce insight, and commercial strategy to shape scalable solutions that drive real business value. About Swanky - Swanky is a leading international Shopify Plus agency, trusted by brands like HelloFresh, Huel, Wilkinson Sword, and Newcastle United Football Club (NUFC) to deliver high-performance ecommerce experiences. As one of the original Shopify Plus Partners and one of only a handful globally to achieve Platinum Partner status were recognised by Shopify for our proven expertise in delivering complex, high-impact solutions at scale. We dont just build stores. We architect digital experiences that drive growth blending creative UX, robust development, and commercial str
        Were looking for a Senior Solutions Engineer to lead the charge on complex, high-impact Shopify Plus builds. Youll translate bold ideas into bulletproof architecture blending technical expertise, ecommerce insight, and commercial strategy to shape scalable solutions that drive real business value. About Swanky - Swanky is a leading international Shopify Plus agency, trusted by brands like HelloFresh, Huel, Wilkinson Sword, and Newcastle United Football Club (NUFC) to deliver high-performance ecommerce experiences. As one of the original Shopify Plus Partners and one of only a handful globally to achieve Platinum Partner status were recognised by Shopify for our proven expertise in delivering complex, high-impact solutions at scale. We dont just build stores. We architect digital experiences that drive growth blending creative UX, robust development, and commercial str
        more
        Our solution hubsSmartBear API Hub, SmartBear Insight Hub, and SmartBear Test Hub, featuring HaloAI, bring visibility and automation to software development, making it easier for teams to deliver high-quality software faster.
        Our solution hubsSmartBear API Hub, SmartBear Insight Hub, and SmartBear Test Hub, featuring HaloAI, bring visibility and automation to software development, making it easier for teams to deliver high-quality software faster.
        more
        NEW
        Our solution hubsSmartBear API Hub, SmartBear Insight Hub, and SmartBear Test Hub, featuring HaloAI, bring visibility and automation to software development, making it easier for teams to deliver high-quality software faster. * API testing methodologies and tools.
        Our solution hubsSmartBear API Hub, SmartBear Insight Hub, and SmartBear Test Hub, featuring HaloAI, bring visibility and automation to software development, making it easier for teams to deliver high-quality software faster. * API testing methodologies and tools.
        more
        NEW

        R&D Engineer - Remote

        MailerLite
        UK
        From £37,000 to £63,000 per annum (renumeration is paid in USD)
        MCP & API development: Maintain and develop our MCPs and extend MailerLites capabilities * API & System knowledge: REST APIs, webhooks, distributed systems design
        MCP & API development: Maintain and develop our MCPs and extend MailerLites capabilities * API & System knowledge: REST APIs, webhooks, distributed systems design
        more
        NEW

        Senior PHP Developer - UK Remote

        Global Technology Solutions Ltd
        UK
        £350- £370 per day - Inside IR35
        Senior PHP Developer - Location: Home-based - Remote - UK Based applicants only - Duration: Contract until 31 st December 2025 Expected extension - Rate: £350 - £370 Inside IR35 - Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? Were looking for a Senior PHP Developer to join our transformation team someone who can drive technical excellence, mentor others, and deliver innovative solutions. What Youll Do * Develop and maintain business systems, applications, and integrations. * Write secure, scalable, and maintainable code following best practices (MVC standards). * Design and build intuitive user interfaces using HTML, CSS, JavaScript (Vue.js or similar). * Review code and ensure high-quality, defect-free releases. * Document system architecture, design iterations, and processes.
        Senior PHP Developer - Location: Home-based - Remote - UK Based applicants only - Duration: Contract until 31 st December 2025 Expected extension - Rate: £350 - £370 Inside IR35 - Are you an experienced Senior PHP Developer with a passion for building secure, scalable, and business-critical applications? Were looking for a Senior PHP Developer to join our transformation team someone who can drive technical excellence, mentor others, and deliver innovative solutions. What Youll Do * Develop and maintain business systems, applications, and integrations. * Write secure, scalable, and maintainable code following best practices (MVC standards). * Design and build intuitive user interfaces using HTML, CSS, JavaScript (Vue.js or similar). * Review code and ensure high-quality, defect-free releases. * Document system architecture, design iterations, and processes.
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        Day Rate: £500 - £700 - Duration: 6 months - IR35: Outside Scope - Overview - Are you a talented Software Developer eager to take on exciting project-based work with leading organisations? We are seeking skilled developers for multiple contract opportunities across various sectors, including tech, finance, and healthcare. * Engage in diverse and challenging projects, delivering immediate value to clients while enhancing your technical skills. * Collaborate with innovative teams to design and implement robust software solutions that meet business needs. * Experience the flexibility of contract work, allowing you to choose projects that align with your expertise and career goals. These contract roles are ideal for developers looking to make an impact quickly and explore different industries while enjoying the freedom of flexible assignments. Key Skills
        Day Rate: £500 - £700 - Duration: 6 months - IR35: Outside Scope - Overview - Are you a talented Software Developer eager to take on exciting project-based work with leading organisations? We are seeking skilled developers for multiple contract opportunities across various sectors, including tech, finance, and healthcare. * Engage in diverse and challenging projects, delivering immediate value to clients while enhancing your technical skills. * Collaborate with innovative teams to design and implement robust software solutions that meet business needs. * Experience the flexibility of contract work, allowing you to choose projects that align with your expertise and career goals. These contract roles are ideal for developers looking to make an impact quickly and explore different industries while enjoying the freedom of flexible assignments. Key Skills
        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 4 contract API jobs within 10 miles of Cardiff available on Totaljobs 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 Salesforce, Data Analytics, Services, amongst many others.