Salary: £100,000 - 100,000 per year Requirements: Strong commercial experience developing backend systems using Java (Spring Boot or similar frameworks) Proven experience building distributed systems and microservices architectures Experience designing and implementing event-driven architectures using messaging or streaming technologies Experience working with cloud platforms (AWS preferred) and modern DevOps practices Familiarity with containerisation and orchestration tools such as Docker and Kubernetes Strong experience with API design and scalable service architectures Experience working with NoSQL and distributed data stores such as DynamoDB or MongoDB Understanding of modern architectural patterns including CQRS and Event Sourcing Responsibilities: Design and deliver scalable Java-based microservices and distributed systems within a modern cloud-native architecture Lead the development of event-driven architectures using messaging, event streaming, and asynchronous processing patterns Contribute to the evolution of the platform architecture using CQRS, Event Sourcing, and domain-driven design principles Build and maintain services deployed in containerised environments using Kubernetes in AWS Develop and optimise APIs and service integrations used across multiple internal platforms Partner with engineering teams globally to establish architecture standards and best practices for APIs and event-driven systems Identify and lead initiatives to address architecture debt, improve operational efficiency, and modernise legacy services Ensure systems align with AWS Well-Architected Framework principles, focusing on reliability, performance, cost optimisation, and security Contribute hands-on to the delivery of mission-critical platform projects when required Technologies: API AWS Backend Cloud CQRS DevOps Docker Java Kubernetes MongoDB NoSQL Security Spring Spring Boot microservices More: We are a globally recognised SaaS technology company building large-scale data and commerce platforms used by some of the worlds most recognisable retail and consumer brands. Our Belfast engineering centre plays a key role in designing and delivering highly scalable cloud-native systems that process millions of transactions and events daily. We offer the opportunity to work on high-scale global SaaS platforms, competitive salary, bonus, and a strong benefits package, all within a high-performing engineering team that enjoys global collaboration. last updated 18 week of 2026