Senior Semantic Data Scientist & Knowledge Graph Engineer

Altia; Bilbao; On-site; EUR 90,000 - 120,000; Full time

Benefits offered by this job

High-impact project

Collaborative work environment

Career Plan

Training Plan

Flexible Remuneration

Job summary

Altia is seeking a Senior Data Scientist / Semantic Data Engineer with expertise in semantic data, ontologies, and knowledge graphs. You will design and implement data solutions that transform heterogeneous sources into interoperable, semantically enriched data.

You will build ontologies, align models, develop SPARQL queries, and implement Linked Data transformations using RDF standards. You will collaborate with international teams supporting European institutions to deliver scalable semantic

Qualifications

• Experience designing semantic data models and ontologies.
• Proficiency with RDF/OWL/SHACL and linked data standards.
• Experience with data ingestion and ETL/ELT pipelines.
• Ability to communicate complex semantic concepts to stakeholders.

Responsibilities

• Design semantic data solutions and align ontologies for interoperability.
• Develop and optimize knowledge graphs and SPARQL queries.
• Ingest and transform data from multiple sources into RDF environments.
• Collaborate with international teams and stakeholders to translate requirements.

Skills

Semantic data expertise

Knowledge graphs

Ontology engineering

Stakeholder communication

Tools

SPARQL

QLever

Virtuoso

GraphDB

OWL

RDF

SHACL

SKOS

JSON-LD

Turtle

RML

Job description

Altia is seeking a Senior Data Scientist / Semantic Data Engineer with expertise in semantic data, ontologies, and knowledge graphs. You will design and implement data solutions that transform heterogeneous sources into interoperable, semantically enriched data.

You will build ontologies, align models, develop SPARQL queries, and implement Linked Data transformations using RDF standards. You will collaborate with international teams supporting European institutions to deliver scalable semantic