1 to 25 of 29 API Development Jobs in Wales

Data Architecture: Design and implement data solutions using Azure SQL, Synapse, Data Lake, and Data Factory (ADFv2). System Integration: Lead the migration and development of scalable integration frameworks; build robust ETL/ELT pipelines. Infrastructure: Ensure data infrastructure is high-performing, secure, and future-proof using native Azure … services. API Development: Develop APIs and web services (.NET/C#) to support secure data exchange and third-party connectivity. Customer-Facing Collaboration: Engage directly with customers to scope, define, and deliver integration solutions. Performance & Optimisation: Continuously improve reliability, speed, and observability of existing data pipelines. Documentation: Maintain … roles, ideally within SaaS or cloud-native environments. Strong Azure background: Data Factory, Synapse, SQL, Data Lake, Event Grid, etc. Hands-on with modern API development (REST, SOAP) and data formats (JSON, XML). Experience building and scaling system integrations. Proficient in .NET/C# (desirable). Familiarity More ❯

Data Architecture: Design and implement data solutions using Azure SQL, Synapse, Data Lake, and Data Factory (ADFv2). System Integration: Lead the migration and development of scalable integration frameworks; build robust ETL/ELT pipelines. Infrastructure: Ensure data infrastructure is high-performing, secure, and future-proof using native Azure … services. API Development: Develop APIs and web services (.NET/C#) to support secure data exchange and third-party connectivity. Customer-Facing Collaboration: Engage directly with customers to scope, define, and deliver integration solutions. Performance & Optimisation: Continuously improve reliability, speed, and observability of existing data pipelines. Documentation: Maintain … roles, ideally within SaaS or cloud-native environments. Strong Azure background: Data Factory, Synapse, SQL, Data Lake, Event Grid, etc. Hands-on with modern API development (REST, SOAP) and data formats (JSON, XML). Experience building and scaling system integrations. Proficient in .NET/C# (desirable). Familiarity More ❯

Data Architecture: Design and implement data solutions using Azure SQL, Synapse, Data Lake, and Data Factory (ADFv2). System Integration: Lead the migration and development of scalable integration frameworks; build robust ETL/ELT pipelines. Infrastructure: Ensure data infrastructure is high performing, secure, and future proof using native Azure … services. API Development: Develop APIs and web services (.NET/C) to support secure data exchange and third party connectivity. Customer-Facing Collaboration: Engage directly with customers to scope, define, and deliver integration solutions. Performance & Optimisation: Continuously improve reliability, speed, and observability of existing data pipelines. Documentation: Maintain … roles, ideally within SaaS or cloud native environments. Strong Azure background: Data Factory, Synapse, SQL, Data Lake, Event Grid, etc. Hands on with modern API development (REST, SOAP) and data formats (JSON, XML). Experience building and scaling system integrations. Proficient in .NET/C (desirable). Familiarity More ❯

Data Architecture: Design and implement data solutions using Azure SQL, Synapse, Data Lake, and Data Factory (ADFv2). System Integration: Lead the migration and development of scalable integration frameworks; build robust ETL/ELT pipelines. Infrastructure: Ensure data infrastructure is high performing, secure, and future proof using native Azure … services. API Development: Develop APIs and web services (.NET/C) to support secure data exchange and third party connectivity. Customer-Facing Collaboration: Engage directly with customers to scope, define, and deliver integration solutions. Performance & Optimisation: Continuously improve reliability, speed, and observability of existing data pipelines. Documentation: Maintain … roles, ideally within SaaS or cloud native environments. Strong Azure background: Data Factory, Synapse, SQL, Data Lake, Event Grid, etc. Hands on with modern API development (REST, SOAP) and data formats (JSON, XML). Experience building and scaling system integrations. Proficient in .NET/C (desirable). Familiarity More ❯

proven track record in software development. A minimum of 4 years experience working with the Microsoft full stack of technologies. Essential Skills Full Stack Development: Demonstrated experience in full-stack development across both front-end and back-end. Proficiency in .NET Core & .NET Framework : Solid experience with C# … ASP.NET Core, ASP.NET MVC, and Blazor. Front-End Development : Deep knowledge of front-end technologies such as HTML5, CSS3, JavaScript (including JQuery), and frameworks like Bootstrap. Web Technologies : Experience with XML, JSON, and WCF. Web Services & API Development : Advanced experience working with RESTful APIs, SOAP, and Web … API development. T-SQL Development : Strong understanding and hands-on experience with SQL, including writing stored procedures, functions, and complex queries. Version Control with Git : Proficient with version control tool Git for collaborative development. Additional Skills Workload Management: Ability to manage multiple tasks simultaneously. Problem Solving & Decision Making More ❯

recognisable brands and public sector organisations This role offers the chance to work on cutting-edge web and mobile applications, collaborating within an Agile development environment to deliver high-performance, scalable, and maintainable solutions. As a key part of the team, you will provide technical leadership, contribute to architecture … decisions, and ensure best practices in development and deployment. Key Responsibilities Lead the development of front-end and back-end components using JavaScript, Node.js, and modern frameworks like Angular, React, or Vue.js. Provide mentorship to developers, ensuring high-quality code through best practices. Work closely with architects, product … teams, and stakeholders to design robust, scalable, and secure architectures. Participate in Agile development, including sprint planning, stand-ups, and retrospectives. Conduct code reviews and champion Test Driven Development (TDD) practices. Stay updated with emerging technologies to drive continuous learning and innovation. Must-Have Skills Experience developing with More ❯

recognisable brands and public sector organisations This role offers the chance to work on cutting-edge web and mobile applications, collaborating within an Agile development environment to deliver high-performance, scalable, and maintainable solutions. As a key part of the team, you will provide technical leadership, contribute to architecture … decisions, and ensure best practices in development and deployment. Key Responsibilities Lead the development of front-end and back-end components using JavaScript, Node.js, and modern frameworks like Angular, React, or Vue.js. Provide mentorship to developers, ensuring high-quality code through best practices. Work closely with architects, product … teams, and stakeholders to design robust, scalable, and secure architectures. Participate in Agile development, including sprint planning, stand-ups, and retrospectives. Conduct code reviews and champion Test Driven Development (TDD) practices. Stay updated with emerging technologies to drive continuous learning and innovation. Must-Have Skills Experience developing with More ❯

recognisable brands and public sector organisations This role offers the chance to work on cutting-edge web and mobile applications, collaborating within an Agile development environment to deliver high-performance, scalable, and maintainable solutions. As a key part of the team, you will provide technical leadership, contribute to architecture … decisions, and ensure best practices in development and deployment. Key Responsibilities Lead the development of front-end and back-end components using JavaScript, Node.js, and modern frameworks like Angular, React, or Vue.js. Provide mentorship to developers, ensuring high-quality code through best practices. Work closely with architects, product … teams, and stakeholders to design robust, scalable, and secure architectures. Participate in Agile development, including sprint planning, stand-ups, and retrospectives. Conduct code reviews and champion Test Driven Development (TDD) practices. Stay updated with emerging technologies to drive continuous learning and innovation. Must-Have Skills Experience developing with More ❯

of our integrations with different e-commerce platforms as a pivotal figure within our Risk and Identity Solutions team. Actively participate in full stack development projects, constructing real-time transactional services, REST services API, and container-based services. Develop and maintain highly functional, secure, scalable, and resilient real … Proven experience as a Senior Staff Software Engineer, or similar role, with a demonstrated history of leading large-scale projects. Extensive expertise in software development, particularly with e-commerce platform integrations. Understanding and experience with building real-time transactional services, REST services API, and container-based services. High … Fintech, Retail, Healthcare, Insurance You have expertise of Core Java, JEE technologies, Web technologies, JavaScript and container based technologies. Proficient in Web Services/API Development using SOAP or REST, JSON and XML. Proficient in Kafka - Ability to install, maintain and troubleshoot Kafka. Have experience with messaging and More ❯

of our integrations with different e-commerce platforms as a pivotal figure within our Risk and Identity Solutions team. Actively participate in full stack development projects, constructing real-time transactional services, REST services API, and container-based services. Develop and maintain highly functional, secure, scalable, and resilient real … Proven experience as a Senior Staff Software Engineer, or similar role, with a demonstrated history of leading large-scale projects. Extensive expertise in software development, particularly with e-commerce platform integrations. Understanding and experience with building real-time transactional services, REST services API, and container-based services. High … Fintech, Retail, Healthcare, Insurance You have expertise of Core Java, JEE technologies, Web technologies, JavaScript and container based technologies. Proficient in Web Services/API Development using SOAP or REST, JSON and XML. Proficient in Kafka - Ability to install, maintain and troubleshoot Kafka. Have experience with messaging and More ❯

Requirements A proven track record in software development. A minimum of 4 years' experience working with the Microsoft full stack of technologies. Full Stack Development: Demonstrated experience in full-stack development across both front-end and back-end. Proficiency in .NET Core & .NET Framework: Solid experience with C# … ASP.NET Core, ASP.NET MVC, and Blazor. Web Technologies: Experience with XML, JSON, and WCF. Web Services & API Development: Advanced experience working with RESTful APIs, SOAP, and Web API development. T-SQL Development: Strong understanding and hands-on experience with SQL, including writing stored procedures, functions, and More ❯

build of our integrations with different payment networks as a pivotal figure within our VPC & Domestic Processing team in Payment Processing Actively participate in development projects, constructing, REST services API, and container-based services. Develop and maintain highly functional, secure, scalable, and resilient systems Prioritize and manage multiple … pushing for team-wide growth and success. Regularly report progress, issues and solutions to upper management to keep them informed. Provide technical leadership to development team by participating in design, performing design reviews and code reviews. Provide technical leadership for quality assurance and test engineering activities manual and automation … Fintech, Retail, Healthcare, Insurance You have expertise of Core Java, JEE technologies, Web technologies, JavaScript and container based technologies. Proficient in Web Services/API Development using SOAP or REST, JSON and XML. Experience in Kafka - Ability to install, maintain and troubleshoot Kafka. Have experience with messaging and More ❯

build of our integrations with different payment networks as a pivotal figure within our VPC & Domestic Processing team in Payment Processing Actively participate in development projects, constructing, REST services API, and container-based services. Develop and maintain highly functional, secure, scalable, and resilient systems Prioritize and manage multiple … pushing for team-wide growth and success. Regularly report progress, issues and solutions to upper management to keep them informed. Provide technical leadership to development team by participating in design, performing design reviews and code reviews. Provide technical leadership for quality assurance and test engineering activities manual and automation … Fintech, Retail, Healthcare, Insurance You have expertise of Core Java, JEE technologies, Web technologies, JavaScript and container based technologies. Proficient in Web Services/API Development using SOAP or REST, JSON and XML. Experience in Kafka - Ability to install, maintain and troubleshoot Kafka. Have experience with messaging and More ❯

you? Competitive Salary Employer pension contributions Employee Benefits Program (after probation) Hybrid working (3 days after the first 12 weeks) Training budget for professional development Modern office environment in Belfast The chance to work on a cutting-edge AI-driven platform, leveraging the latest in AI tech and innovation … great fit if you have: Strong experience in .NET (C#, .NET Core) and SQL Server Proficiency in Azure cloud services and cloud-based application development Experience with front-end technologies such as JavaScript, Angular, or React Knowledge of microservices architecture & API development A genuine interest in AI More ❯

you? Competitive Salary Employer pension contributions Employee Benefits Program (after probation) Hybrid working (3 days after the first 12 weeks) Training budget for professional development Modern office environment in Belfast The chance to work on a cutting-edge AI-driven platform, leveraging the latest in AI tech and innovation … great fit if you have: Strong experience in .NET (C#, .NET Core) and SQL Server Proficiency in Azure cloud services and cloud-based application development Experience with front-end technologies such as JavaScript, Angular, or React Knowledge of microservices architecture & API development A genuine interest in AI More ❯

purpose-driven industry leader. Join us today and experience Life at Visa. Job Description As the Chief Software Engineer on the core Payment Processing development team within the Acceptance Solutions organization, you will provide technical leadership, foster innovation, set engineering excellence standards, and collaborate with business teams to develop … AI/ML technologies in bringing productivity across the SDLC phases and develop innovative business solutions and products. Establish engineering best practices for application development, testing, deployment and monitoring. Collaborate with security, privacy, and governance teams to ensure that the products developed comply with relevant policies, standards, and regulations. … in both on-premises and cloud environments. Proficiency in one or more modern programming languages (Java, Python). Hands-on experience in software product development utilizing technologies, tools, and frameworks such as Tomcat, TC Server, VertX, Spring, GIT/Stash, Sonar, etc. Experience in developing event-driven applications using More ❯

purpose-driven industry leader. Join us today and experience Life at Visa. Job Description As the Chief Software Engineer on the core Payment Processing development team within the Acceptance Solutions organization, you will provide technical leadership, foster innovation, set engineering excellence standards, and collaborate with business teams to develop … AI/ML technologies in bringing productivity across the SDLC phases and develop innovative business solutions and products. Establish engineering best practices for application development, testing, deployment and monitoring. Collaborate with security, privacy, and governance teams to ensure that the products developed comply with relevant policies, standards, and regulations. … in both on-premises and cloud environments. Proficiency in one or more modern programming languages (Java, Python). Hands-on experience in software product development utilizing technologies, tools, and frameworks such as Tomcat, TC Server, VertX, Spring, GIT/Stash, Sonar, etc. Experience in developing event-driven applications using More ❯

develop cloud-native backend services using Python and AWS Lambda * Build scalable microservices and event-driven systems using SQS, SNS, and EventBridge * Contribute to API development (REST/GraphQL) and data integration pipelines * Collaborate with cross-functional teams on architecture and system design * Interface with frontend engineers (Vue.js … non-technical stakeholders Essential Criteria: * 8-10+ years of software engineering experience, ideally in a SaaS or cloud-first environment * Strong Python backend development experience * Deep understanding of AWS serverless tools (Lambda, DynamoDB, API Gateway, etc.) * Experience building distributed systems and event-driven architecture * Familiarity with GraphQL … APIs and scalable API design * Exposure to cloud observability (tracing, metrics, logging) and DevOps workflows * Comfortable working in Slack-based, fast-feedback environments * Excellent communication skills and ability to work across regions Desirable Experience: * Experience with time-series data and cost intelligence platforms * Familiarity with Snowflake, Airflow, DBT, or More ❯

develop cloud-native backend services using Python and AWS Lambda * Build scalable microservices and event-driven systems using SQS, SNS, and EventBridge * Contribute to API development (REST/GraphQL) and data integration pipelines * Collaborate with cross-functional teams on architecture and system design * Interface with frontend engineers (Vue.js … non-technical stakeholders Essential Criteria: * 8-10+ years of software engineering experience, ideally in a SaaS or cloud-first environment * Strong Python backend development experience * Deep understanding of AWS serverless tools (Lambda, DynamoDB, API Gateway, etc.) * Experience building distributed systems and event-driven architecture * Familiarity with GraphQL … APIs and scalable API design * Exposure to cloud observability (tracing, metrics, logging) and DevOps workflows * Comfortable working in Slack-based, fast-feedback environments * Excellent communication skills and ability to work across regions Desirable Experience: * Experience with time-series data and cost intelligence platforms * Familiarity with Snowflake, Airflow, DBT, or More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing: Expect to use your knowledge of architecture; our clients will look to you for advice and contribution … in higher level architectural discussions. Own the development process for your team, building strong principles and putting robust methods and patterns in place across architecture, scope, code quality, infrastructure and deployments. Model team behaviour for writing specifications and acceptance criteria, estimating stories, sprint planning and documentation. Actively define and … in UI engineering using CSS, strong knowledge of accessibility compliance and working with designers to deliver design systems in code. Demonstrable experience of backend API development with Node.js including databases, ORM patterns (e.g. Prisma) and designing service-oriented architectures. Experience of developing cloud-native applications in one of More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing: Expect to use your knowledge of architecture; our clients will look to you for advice and contribution … in higher level architectural discussions. Own the development process for your team, building strong principles and putting robust methods and patterns in place across architecture, scope, code quality, infrastructure and deployments. Model team behaviour for writing specifications and acceptance criteria, estimating stories, sprint planning and documentation. Actively define and … in UI engineering using CSS, strong knowledge of accessibility compliance and working with designers to deliver design systems in code. Demonstrable experience of backend API development with Node.js including databases, ORM patterns (e.g. Prisma) and designing service-oriented architectures. Experience of developing cloud-native applications in one of More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing: Expect to use your knowledge of architecture; our clients will look to you for advice and contribution … in higher level architectural discussions. Own the development process for your team, building strong principles and putting robust methods and patterns in place across architecture, scope, code quality, infrastructure and deployments. Model team behaviour for writing specifications and acceptance criteria, estimating stories, sprint planning and documentation. Actively define and … in UI engineering using CSS, strong knowledge of accessibility compliance and working with designers to deliver design systems in code. Demonstrable experience of backend API development with Node.js including databases, ORM patterns (e.g. Prisma) and designing service-oriented architectures. Experience of developing cloud-native applications in one of More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing: Expect to use your knowledge of architecture; our clients will look to you for advice and contribution … in higher level architectural discussions. Own the development process for your team, building strong principles and putting robust methods and patterns in place across architecture, scope, code quality, infrastructure and deployments. Model team behaviour for writing specifications and acceptance criteria, estimating stories, sprint planning and documentation. Actively define and … in UI engineering using CSS, strong knowledge of accessibility compliance and working with designers to deliver design systems in code. Demonstrable experience of backend API development with Node.js including databases, ORM patterns (e.g. Prisma) and designing service-oriented architectures. Experience of developing cloud-native applications in one of More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing You'll have the support of experienced professionals within the team, who can give you guidance and … team discussions with the client on the project and contributing your thoughts and ideas into the team Qualifications Experience of full stack web application development using TypeScript including React and Experience of UI engineering using CSS, knowledge of accessibility compliance and working with designers to deliver design systems in … code. Proven experience of backend API development with Node.js including an understanding of databases, ORM patterns (e.g. Prisma) and service-oriented architectures. Experience of developing cloud-native applications in one of AWS, Azure or GCP, ideally using a serverless architecture (e.g. functions, message queues, databases, API gateways More ❯

solutions, report progress, and provide technical support. You will be required to have excellent client facing skills as well as solid technical knowledge and development craft skills. What you'll be doing You'll have the support of experienced professionals within the team, who can give you guidance and … team discussions with the client on the project and contributing your thoughts and ideas into the team Qualifications Experience of full stack web application development using TypeScript including React and Experience of UI engineering using CSS, knowledge of accessibility compliance and working with designers to deliver design systems in … code. Proven experience of backend API development with Node.js including an understanding of databases, ORM patterns (e.g. Prisma) and service-oriented architectures. Experience of developing cloud-native applications in one of AWS, Azure or GCP, ideally using a serverless architecture (e.g. functions, message queues, databases, API gateways More ❯