FunctieomschrijvingWHO WE ARE
Edda International, a dynamic and rapidly growing European group of companies with an estimated 2024 turnover of 20+ MEUR, 220+ employees and 15+ years of experience. Operating out of Luxembourg and Brussels, Edda International manages large International Institutions Framework Contracts delivering Information Technology services throughout geographical Europe. WHAT WE ARE LOOKING FOR
Java Developer – GraphDB & Semantic Web | European Institutions
We are currently looking for two highly motivated Java Developers to support our client’s projects at a prestigious European Institution in Luxembourg (Kirchberg). The mission involves working with graph databases and semantic web technologies, driving innovation in data representation, retrieval, and UI integration.
We are hiring for:
1 Junior Developer (1–4 years of experience) – full-time onsite
1 Senior Developer – flexible model: onsite, near-site (within 2h travel) or remote (minimum 20% onsite)
In these roles, you will contribute to software development activities in the domain of semantic web, data visualization, and search technologies used by one of the most influential institutions in Europe. YOUR TASKS
Design and develop scalable Java applications integrated with GraphDB technologies
Write and optimize SPARQL queries
Develop and maintain ETL processes for existing and new tools
Implement new features and extend internal applications built with Java and graph databases
Create and integrate UI filters, data presentation layers, and backend services
Manage different development environments and CI/CD pipelines
Contribute to architectural decisions and evaluate technology options
Optionally, support front-end styling and interaction
Collaborate with institutional stakeholders on product improvements
Support Proof-of-Concept (PoC) creation and adaptive development YOUR SKILLS AND EXPERIENCE
Strong experience in Java development
Hands-on experience with SPARQL, RDF, and GraphDB technologies (e.g., Ontotext, Blazegraph, etc.)
Familiarity with semantic web concepts such as OWL and SHACL is a strong asset
Proficiency with Elastic Search is a plus
Capable of working independently and proactively
Understanding of front-end/backend data flow
CI/CD and versioning experience (e.g., Git, Jenkins)
Previous experience in EU institutions is a plus
Bonus: project management experience or familiarity with institutional workflows EXTRA INFORMATION
Contract type: Permanent employment or freelance
Start date: September/October 2025
Location: Luxembourg (Kirchberg)
Work mode:
Junior: On-site, 5 days/week
Senior: On-site or near-site (within 2 hours from Kirchberg) or remote with minimum 20% onsite
Relocation required if beyond 2h travel from Kirchberg for full on-site positions At Edda International, we are committed to supporting a Diverse and Inclusive Community. This position is open to EU citizens or non-EU citizens already residing in the EU with a valid work permit, due to the sensitive nature of institutional data.