12 of 12 Permanent API Design Jobs in Northern Ireland

here. What You'll Be Doing Lead, mentor, and develop a team of .NET engineers, setting standards and elevating engineering quality across the function Design and build services powering ordering, payments, delivery workflows, and analytics Own technical decision-making across architecture, performance, reliability, and security Work closely with product … design, and data teams to translate operational problems into clean, effective software Champion automated testing, continuous delivery, and good engineering practice Guide the platform's evolution towards modular, cloud-native architectures Review code, support career development, and contribute to hiring plans Collaborate with external stakeholders including retail partners ...

genuine impact on technical direction, engineering standards, and long-term platform strategy. As a Senior Backend Engineer, you will take ownership of backend architecture, API design, infrastructure, and platform reliability. You will work closely with developers across the business to improve scalability, security, performance, and operational excellence while … experience working with AWS cloud infrastructure including services such as Lambda, RDS, S3, and IAM * Strong understanding of application security, authentication, authorisation, and secure API design * Experience designing, optimising, and scaling relational databases (PostgreSQL preferred) * Experience with CI/CD pipelines, DevOps practices, and production environments * Comfortable leading ...

across front-end and back-end, ensuring robust, efficient, and performant delivery. Lead technical decision-making within your squad, balancing innovation with pragmatic delivery. Design and build secure, high-quality back-end services integrated with our cloud platform. Drive best practices in code quality, testing, security, and observability across … Experience working in a fast-moving Agile environment. Strong familiarity with CI/CD practices, tools, and automated testing strategies. Architectural thinking — ability to design scalable systems and make sound technical trade-offs. Strong collaboration and communication skills, with the ability to work effectively across technical and non-technical ...

long-tenured engineering team delivering high-throughput, highly available transaction systems used across the globe. The Role: As a J2EE Software Engineer, you'll design and develop server-side products and APIs on the payment gateway-owning your deliverables end-to-end: discovery design development automated tests release … work in small, empowered teams using BDD/TDD and CI/CD, shipping resilient features for real merchants and real transactions. Key Responsibilities: * Design, implement, and maintain J2EE services and RESTful APIs (JAX-RS/RESTEasy). * Build robust persistence layers with JPA2/Hibernate on MySQL ...

people who bring something new to the team, not just technical skills. What You'll Be Doing As a Senior Backend Developer, you will design, build, and optimise high-quality server-side applications and APIs that power complex digital experiences. Working closely with front-end engineers, DevOps specialists, cloud … building scalable APIs and microservices Hands-on experience with cloud platforms (AWS, Azure, or GCP), including serverless compute Solid understanding of authentication, authorisation, and API security best practices Strong problem-solving skills and familiarity with cloud-native development patterns Desirable Experience with headless e-commerce platforms such as commercetools ...

experience. You'll work closely with engineering, DevOps, and product teams while mentoring others and helping shape the future of the platform. Key Responsibilities: Design, build, and maintain scalable backend services in Go and Java that deliver a seamless and reliable user experience. Lead internal and customer-facing projects … from concept through delivery, with strong ownership and high-quality execution. Own backend architecture, driving improvements in system design, reliability, and maintainability. Build high-availability, cloud-native infrastructure that scales with customer growth. Improve monitoring, alerting, and observability to ensure fast detection and resolution of customer-impacting issues. Contribute ...

passionate frontend engineering team The Role As a Frontend Engineer, you'll be responsible for: * Leading the development of frontend software components, from design to deployment and maintenance * Contributing to technological and architectural decisions, ensuring high-quality code and user experience * Advocating for product and user experience, ensuring aesthetic … architecture alignment * Designing and reviewing APIs in collaboration with other teams * Analyzing and improving the performance, scalability, and efficiency of system components * Conducting design and code reviews to maintain best practices About You You're a great fit if you have: * 3+ years of experience in frontend engineering using ...

passionate frontend engineering team The Role As a Frontend Engineer, you'll be responsible for: * Leading the development of frontend software components, from design to deployment and maintenance * Contributing to technological and architectural decisions, ensuring high-quality code and user experience * Advocating for product and user experience, ensuring aesthetic … architecture alignment * Designing and reviewing APIs in collaboration with other teams * Analyzing and improving the performance, scalability, and efficiency of system components * Conducting design and code reviews to maintain best practices About You You're a great fit if you have: * 3+ years of experience in frontend engineering using ...

Solid understanding of performance optimisation and scalable architecture Experience working in cloud environments (AWS, Azure or GCP) Understanding of distributed systems and API design Experience with databases and performance tuning Familiarity with containerisation (Docker/Kubernetes beneficial) Comfortable working in a start-up or high-growth environment ...

level. You will also mentor junior developers and play an active role in building a strong engineering culture as the team scales. Key Responsibilities Design, build, enhance and maintain scalable back end services and APIs Lead architectural decisions that support rapid growth and increased user demand Work with real … professional back end development experience Strong Node.js and TypeScript skills - this is your primary toolset Solid experience with WebSockets and Strong grasp of REST API design covering authentication, error handling and versioning Comfortable with Redis across pub/sub, caching and queues SQL and relational database experience, ideally ...

experience Strong Node.js and TypeScript skills as your primary development tools Solid experience with WebSockets and for real-time communication Good grasp of REST API design: authentication, error handling, and versioning Comfortable with Redis for pub/sub, caching, and queuing SQL and relational database experience, with ...

frontend architecture and standards across the organisation Drive adoption of React and TypeScript best practice across multiple teams Build and scale component libraries and design systems Partner with Product and UX to deliver clean, intuitive interfaces Mentor engineers and contribute to the overall capability of the team Own performance … accessibility, and long-term maintainability of the frontend Work closely with backend teams on API design and integration Champion modern tooling, testing practices, and CI/CD Contribute to the technical roadmap and broader engineering strategy What You'll Bring Essential Strong commercial experience with React and TypeScript ...