Job description
 
                         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.
 
                    
                    
Required Skill Profession
 
                     
                    
                    Computer Occupations