Senior Semantic Data Scientist - Knowledge Graphs

Altia; Brussel; On-site; EUR 90,000 - 130,000; Full time

Benefits offered by this job

Career Plan

Training Plan

Flexible Remuneration

Job summary

Altia is seeking a Senior Data Scientist / Semantic Data Engineer focused on semantic data, Linked Data, ontology engineering, and knowledge graphs. You will design and implement data solutions based on semantic technologies for international projects supporting European institutions.

Responsibilities include building and maintaining ontologies, knowledge graphs, and data ingestion pipelines, with emphasis on interoperability and semantic enrichment across heterogeneous sources.

Qualifications

• Experience with semantic data, ontologies, and knowledge graphs.
• Ability to translate business needs into semantic data solutions.
• Collaborative work with technical and non-technical stakeholders.

Responsibilities

• Design and implement semantic data solutions, ontologies, and vocabularies.
• Design and maintain knowledge graphs; optimize SPARQL queries and SHACL validations.
• Develop ETL/ELT pipelines to ingest data from multiple sources into RDF environments.
• Implement Linked Data solutions using RDF standards and mapping technologies.

Skills

Semantic data concepts

Stakeholder communication

Data modelling

Tools

RDF / OWL

SPARQL

SHACL

Linked Data technologies

Python

ETL/ELT

Virtuoso/GraphDB

QLever

Job description

Altia is seeking a Senior Data Scientist / Semantic Data Engineer focused on semantic data, Linked Data, ontology engineering, and knowledge graphs. You will design and implement data solutions based on semantic technologies for international projects supporting European institutions.

Responsibilities include building and maintaining ontologies, knowledge graphs, and data ingestion pipelines, with emphasis on interoperability and semantic enrichment across heterogeneous sources.