Data Scientist - European Agency (Semantic Data)

Location: Remote; I. Kerület, Budapest, Hungary

Company

hirify.global is a digital transformation services company delivering international projects for clients across multiple sectors.

What you will do

• Design and align semantic data models and ontologies, develop controlled vocabularies, and manage ontology lifecycles.
• Design, maintain, and optimise knowledge graphs and SPARQL queries.
• Develop ETL/ELT pipelines to ingest, transform, and publish data from relational databases, XML, JSON, CSV, and APIs into RDF environments.
• Implement Linked Data solutions and semantic transformations using RDF standards and mapping technologies.
• Translate business requirements into technical specifications and explain semantic data concepts to technical and non-technical stakeholders.

Requirements

• Senior-level experience in data science, semantic data engineering, or a related field.
• Expertise in semantic data, Linked Data, ontology engineering, and knowledge graphs.
• Experience with RDF, RDFS, OWL, SKOS, SHACL, JSON-LD, Turtle, and RDF/XML.
• Experience with SPARQL, knowledge graph modelling and optimisation, and platforms such as QLever, Virtuoso, or GraphDB.
• Experience with ontology alignment, vocabulary design, ontology lifecycle management, and semantic modelling.
• Python and ETL/ELT experience, including data ingestion and transformation from relational, XML, JSON, CSV, and API sources.
• Knowledge of RML, semantic data validation, RDF mappings, and Linked Data interoperability.

Culture & Benefits

• Remote work and a collaborative work environment.
• High-impact international project supporting European institutions and agencies.
• Career plan and training plan.
• Flexible remuneration.