Senior Backend Java DeveloperContribute to the future of AI-powered matching technologyLocation: Hybrid (Antwerp) | Remote-friendlyAbout the OpportunityFor one of our clients, we are looking for a Senior Backend Java Developer to join their team.Our client is developing cutting-edge matching software that applies advanced AI techniques to connect people with opportunities in a more intelligent and transparent way. By using technologies such as Natural Language Processing (NLP), ontologies, and Large Language Models (LLMs), the platform understands context, interprets language, and delivers relevant matches - even when data is incomplete or inconsistent.As a Senior Backend Java Developer, you'll help build and evolve the core architecture behind this technology. You'll work in a focused, technically driven environment where quality, ownership, and autonomy are central to how the team operates.Your ResponsibilitiesDesign, develop, and maintain backend systems and APIsCollaborate on system architecture and high-level technical decisionsIntegrate diverse data sources and configure matching logicContribute to performance tuning, testing, and deployment pipelinesNavigate and improve a complex, production-level codebaseProactively address technical challenges and suggest architectural improvementsTech EnvironmentJava 11 (with migration to Java 17 underway)REST APIsDocker & Ansible for automationElasticsearch for indexing and semantic searchEmphasis on clean, maintainable, and secure codeComplex, non-standard architecture - ideal for curious engineers who enjoy tackling tough problemsYour ProfileAt least 5 years of experience in backend Java developmentProven ability to work with and design scalable system architecturesStrong problem-solving skills and adaptability in complex environmentsGenuine interest in AI-driven technologies and data-intensive systemsIndependent mindset with a high standard for code quality and securityFluent in Dutch and EnglishBonus SkillsExperience with Docker and/or ElasticsearchFamiliarity with tools like Maven, Jenkins, or AnsibleUnderstanding of LLMs or interest in GPU-based computingWorking SetupThe client offers a hybrid work model with one on-site day per week in Belgium. There is also flexibility for extended remote work, including working from abroad. The team fosters a culture of clear communication, autonomy, and continuous improvement - with space for deep technical focus and exploration.Interested?If you're excited by the idea of working on meaningful, AI-powered technology in a technically challenging environment, we'd love to hear from you.Feel free to reach out for more information or apply directly - we're happy to tell you more about the team, the company, and the impact you can make.