### **WHO 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.**