Full Stack Developer (React & Java) – Defence Industry Genk, Belgium | Hybrid (3–4 Days Onsite) | Travel Required Full-Time | English-Speaking RoleAbout The CompanyWe are working with a cutting-edge software company operating in the defence industry, delivering high-impact training support software systems to support national and international defence initiatives. Based in Genk, Belgium, they specialize in secure, scalable systems that empower our clients across land, air, and cyber domains.As they grow, they're looking for a Full Stack Developer with strong proficiency in React and Java to join their agile, forward-thinking team.Your Role As a Full Stack Developer, you’ll play a vital part in the development of secure and robust applications, working across both frontend and backend stacks. You'll collaborate with engineers, product owners, and project managers to build tools that are not just technically sound, but crucial to the safety and training within the defence industry around the world.Key ResponsibilitiesDesign, develop, test, and deploy high-quality software solutions using Java and ReactCollaborate with cross-functional teams to deliver secure, scalable applicationsParticipate in code reviews, architecture discussions, and system designTravel occasionally (within Europe and beyond) to client sites for project implementation and supportStay current with emerging technologies and best practices in security and software engineeringWhat They're Looking For3+ years of experience in full stack developmentProficiency in Java (Spring Boot) and React.jsStrong knowledge of REST APIs, databases (SQL/NoSQL), and modern CI/CD pipelinesSecurity-conscious mindset with a strong attention to detailFluent in English (spoken and written)Willingness to work 3–4 days per week onsite in GenkAbility and flexibility to travel when requiredNice to HaveExperience working in or with the defence or aerospace industryFamiliarity with containerization (Docker, Kubernetes)Knowledge of secure coding principles or certifications in cybersecurityWhat They OfferCompetitive salary and benefits package up to 6k gross dependent on ability and experienceDynamic and mission-driven work environmentOpportunities for international travel and collaborationState-of-the-art facilities in GenkLearning and development budgetReady to Make an Impact? Join us in building technology that matters. Apply now with your CV and a short motivation letter outlining your experience.