Java Developer – Firefly Framework Brussels - Hybrid Initial 6-month contract, likely extension Up to €500/dayWe’re supporting a well-established consultancy on a long-term project for a leading organisation in the financial or banking sector. They are now looking to bring in an experienced Java Developer with hands-on expertise in the Firefly Framework to join the team and contribute to a critical backend platform build.You will be joining a technically mature team working within a regulated environment. The scope of the project is broad and will likely touch on areas such as transaction processing, backend integration with core banking systems, and data security.If you're keen to work on cutting-edge backend systems in a demanding but rewarding industry environment, keep reading!What we’re looking for:• Strong experience with Java (8 or above)• Proven hands-on knowledge of the Firefly Framework, particularly in building lightweight, high-performance web services• Familiarity with JAX-RS, RESTful API design, and microservice architecture• Experience with dependency injection (e.g. Guice, Spring), especially with Firefly• Good understanding of asynchronous processing, non-blocking I/O, and reactive patterns• Comfortable working in agile environments and collaborating with cross-functional teams• Exposure to cloud-native environments (AWS/GCP) or containerised deployments (Docker/Kubernetes) is a plus5V Tech are acting as an Agency for the purposes of this contract. We offer a reward scheme if you can recommend someone for this contract, up to €250 for you and an additional €250 to a charity of your choice. 5V Tech are recognised talent solutions experts within IoT and Deep Tech working across Europe, the UK and North America.