Data Engineer

Job Title: Graph Lead/Data Engineer Location: Barcelona, Spain - Hybrid: 2-3 Days to Office Every Week Duration: Permanent Employment Type: Full-Time

Roles & Responsibilities: We are looking for a

Knowledge Graph Lead

to own the design, delivery, and operational readiness of a product-grade Knowledge Graph aligned to business and product use cases. Key Responsibilities Validate and evolve

ontologies, schemas, and semantic models

to meet product requirements Lead

data ingestion, transformation, enrichment, indexing, and inference

ensuring data quality and graph integrity Define and manage

KG APIs, exports, versioning, documentation, and sample queries Align KG delivery with

product roadmaps and platform architecture Ensure

performance, scalability, security, monitoring, and governance

of the Knowledge Graph Act as the primary point of contact for the Knowledge Graph across teams Required Technical Skills Knowledge Graph & semantics:

ontologies, taxonomies, controlled vocabularies, RDF/OWL concepts, SPARQL Ontology-driven data modeling

for operational and product use cases Graph databases

and Knowledge Graph platforms (

Cognite Data Platform

) Data engineering pipelines

: ingestion, transformation, enrichment, inference API design

(REST / GraphQL), data contracts, and versioning strategies Cloud platforms

(Azure, AWS, or GCP) with monitoring and reliability practices Security, access control, and data governance