Senior Ontology Engineer
PixelRain AI is a small, fast-moving AI company delivering an AI-powered product-lifecycle knowledge platform for a U.S. Department of War (DoW) customer: governed ingestion of technical documents, an enterprise ontology and knowledge graph, and generative-AI applications that draft maintenance-planning products and answer engineering questions with citations — running in the customer's cloud environment, with an offline variant for disconnected use. Small team, real users, working software demonstrated every sprint.
Salary: 175,000 - 228,000
Active US Security Clearance Required
What you'll do
• Design, build, and maintain the enterprise ontology (BFO/CCO-aligned) and controlled vocabularies, and map source-system data into them.
• Build and manage the knowledge graph: RDF triple store (Apache Jena/Fuseki or similar), SHACL validation, SPARQL queries.
• Build the governed ingestion path so extracted content lands in the graph with provenance and confidence, and connect the graph to retrieval and GenAI applications.
• Carry normal full-stack development work alongside the ontology work — Python services, web UI, AWS.
• Work in a small Scrum team; demo working software every sprint.
This role requires you to be in the United States. If that means relocating or flying in, it is worth checking fares before you commit to a start date.
Compare flights and hotels →Get remote full-time jobs like this by email
10 hand-picked jobs, one email a day. No spam, unsubscribe anytime.
Similar for you
Get 10 hand-picked remote jobs like this one in your inbox every morning. One email a day, matched to what you browse. No spam, one-click unsubscribe.
No thanks — continue to the application ↗