1 to 25 of 49 API Development Jobs in West Yorkshire

+ Bonus + Excellent Benefits Hybrid/West Yorkshire Looking for your next step as a Senior Developer with strong API expertise? This well-established organisation is investing heavily in tech and needs a confident engineer to help lead the way with their cloud-first, microservices-based systems. You … ll be involved in shaping development standards, mentoring others, supporting third-line issues, and leading the design of scalable, secure APIs using .NET and Azure. What you'll be doing: Leading API development and integration work in a microservices environment Designing and delivering .NET-based services that … are reliable, secure, and scalable Setting and maintaining development standards across the team Working closely with stakeholders to understand requirements and troubleshoot issues Taking ownership of solution design, technical documentation, and governance Keeping an eye on innovation and emerging tech to improve systems and services Tech stack and experience 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 ❯

and industry trends. Ensure compliance with UK regulations (UK-GDPR, PCI-DSS, FCA Conduct Rules). Key Skills: 10+ years of experience in software development, with at least 3 years in an architect or technical lead role. Proven expertise in designing and building high-traffic, transactional E-Commerce platforms. … Strong experience with C#, .NET, Java, JavaScript frameworks (AngularJS, jQuery). Proficiency in API development (REST, SOAP, LDAP) with data formats like JSON & XML. Knowledge of relational (MS SQL Server) and document-oriented databases (Oracle Endeca). Experience in secure web and API development, including OWASP 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 ❯

Solution Architect - AWS, API, Microservices, Remote, FinTech Salary - £90,000/£100,000 + 10% Bonus + Benefits Location - London, Remote We're proud to represent a FinTech scale-up setting a new industry standard in their market. With ambitious plans to scale the platform over the next few … understand business requirements and translate them into technical solutions Design and architect scalable, resilient, and secure microservices-based applications on AWS cloud platform. Develop API strategies and integrations to enable seamless communication between different systems and services. Provide technical leadership and guidance throughout the software development lifecycle, from … with microservices architecture, including design patterns, containerisation, and orchestration (e.g., Docker, Kubernetes). Strong proficiency in AWS cloud services, including EC2, Lambda, S3, RDS, API Gateway, and IAM. In-depth knowledge of secure financial systems, including banking, payments, trading, or risk management. Hands-on experience with API development 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 ❯

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 ❯

secure coding principles (e.g., OWASP) for protection against vulnerabilities and the ability to implement secure coding and deployment best practices. Experience in Agile software development methodologies and how DevOps practices integrate within Agile teams. Familiarity with caching technologies such as Squid Cache or F5 load balancer cache to enhance … languages such as C#, Java, .NET. Knowledge of relational databases (e.g., MS SQL Server) and document-oriented databases (e.g., Oracle Endeca). Familiarity with API Development using different API types: SOAP, LDAP, RESTful for data exchange using XML to support front-end applications and third-party integrations … days per week in the office, allowing the perfect balance between collaborative in-person teamwork and the flexibility to work from home. TRAINING & DEVELOPMENT Turning your job into a career is a real passion for us and our development programmes will enable you to grow in role. We 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 ❯

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 ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across 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 ❯

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 ❯

DOE Who is this role for? A mid-level Full Stack .NET Developer with strong back-end experience, ideally with 5+ years of commercial development expertise in .NET, C#, and SQL, looking for a long-term career move with a well-established company. What is the opportunity? Our client … a leading British manufacturer based in Leeds, is looking for a skilled Full Stack .NET Developer to join their growing development team. As they continue to modernise and integrate their business systems, e-commerce platform, and internal applications, this is an exciting opportunity to play a key role in … responsibilities will include: ✅ Designing, developing, and maintaining back-end services and APIs using .NET 8 & 6, ASP.NET Core, and C# ✅ Contributing to front-end development with modern frameworks like Angular, React, TypeScript, and JavaScript ✅ Working with Azure cloud services and databases (SQL Server, Azure SQL) to optimise performance and More ❯

shape and optimise critical business applications used worldwide, making a tangible impact across multiple regions and business units. This is more than just a development job — it's a chance to collaborate with international teams, deliver meaningful solutions to real business challenges, and grow your technical expertise in a … smooth deployment, testing, and maintenance of software products Providing expert-level technical support and user training across the business Promoting best practices in software development and contributing to a high-performance IT team culture What You’ll Bring Essential Skills & Experience: 3+ years’ experience in software development, ideally … using Java, C# (.NET), and SQL Server Proficiency with Microsoft development tools like Visual Studio and SQL Server Management Studio Solid understanding of system architecture, software development lifecycles, and enterprise application integration Excellent problem-solving skills with a hands-on approach to debugging and optimisation Desirable: Familiarity with 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 ❯

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 ❯