Role: Senior Java Software Engineer
Location: Brussels, Belgium
Contract: 12 months
Rate: Flexible
We are looking for a Senior Java Software Engineer to join a high-performing technology team responsible for building and modernising mission-critical financial systems in a regulated environment.
The role focuses on the design and development of cloud-ready, event-driven Java services, operating at scale and integrating with both modern platforms and legacy backend systems.
You will work as part of an Agile delivery team, collaborating closely with architects, technical leads, and other engineers to deliver robust, secure, and performant solutions.
Key Responsibilities
* Design, develop, and maintain Java-based microservices using modern frameworks
* Contribute to event-driven and service-oriented architectures
* Ensure solutions meet functional and non-functional requirements (performance, resilience, security)
* Align implementations with enterprise architecture and engineering standards
* Participate in solution design walkthroughs and peer reviews
* Undertake hands-on development while mentoring more junior engineers
* Support delivery across the full SDLC, including testing, deployment, and post-production support
Required Technical Skills
* Strong core Java development experience
* Hands-on experience with Spring Boot and microservices
* Experience building containerised applications using Docker and Kubernetes / OpenShift
* Practical experience with event streaming platforms (e.g. Kafka)
* Experience developing and deploying on Linux / Unix environments
* Solid understanding of object-oriented design and clean code principles
* Experience with test-driven and behaviour-driven development
* Exposure to performance profiling and tuning
Nice to Have
* Experience in regulated or financial services environments
* Knowledge of messaging standards (e.g. JSON)
* Familiarity with DevOps practices and tooling
* Exposure to legacy systems or mainframe integration