Postes à Nancy, France

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.

Role: 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.

• 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

• 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

• 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.