Ontology Engineer-Knowledge Graph & Identity

Ontology Implementation & Validation

Implement and extend Samba's RDF/RDFS/OWL ontology schemas in the graph database - adding entity classes, properties, and constraints in a consistent, governed way under the direction of the Senior Ontologist

Build and maintain SHACL validation shapes for post-load graph consistency checks; identify and triage data quality and schema violations

Support ontology versioning, change log documentation, and consistency checking across schema updates

Write efficient, well-structured SPARQL queries and graph traversals to support downstream data science and product use cases

Event-to-Ontology Derivation Pipelines

Contribute to the event-to-ontology transformation and derivation layer - building PySpark/Databricks pipelines that aggregate raw TV viewership and web activity events into durable graph attributes (genre affinity, brand affinity, topic affinity, viewing summaries, lifecycle signals)

Implement derivation logic specified by the Senior Ontologist and data science team; validate outputs against SHACL shapes before graph load

Support incremental refresh and update logic aligned with the graph's batch refresh cadence

Technical Contribution

Write production-quality Python - clean, well-tested, documented, and reusable by teammates

Work with PySpark and Databricks to process and transform high-volume data as part of graph pipeline development

Apply embedding-based approaches (semantic similarity, vector search) to entity matching and ontology alignment tasks

Contribute to team tooling, documentation, and reusable components that improve knowledge graph development efficiency

Collaboration & Growth

Partner closely with data engineering on pipeline design, data quality, and incremental ingestion patterns feeding the materialized graph substrate

Participate in ontology design reviews and cross-functional working groups

Work with product and operations teams to understand use case requirements and translate them into graph schema updates

Actively develop expertise in W3C semantic web standards, RDF-native graph databases, and entity resolution under the guidance of the Senior Ontologist