Semantic AI Engineer (Remote)

About the role

BairesDev is hiring a Semantic AI Engineer for a fully remote position. You will build the foundation of a neurosymbolic AI system that produces deterministic, trustworthy outputs, designing a bounded domain ontology and building the pipeline that turns heterogeneous data into a structured, typed graph.

Key responsibilities

• Design a bounded domain ontology from a reference dataset, including entity types, typed relationships, cardinality and shape rules.
• Build entity resolution and semantic alignment pipelines that map model-generated concepts to canonical ontology entities.
• Implement formal constraint reasoning for satisfiability, contradiction detection and counterexample generation.
• Build SPARQL and RDF store operations behind an encapsulated semantic API.
• Design evaluation and reproducibility engineering, including accuracy metrics, ontology coverage and reproducibility guarantees.

Required profile

• 8+ years of experience in data science, ontology engineering or semantic modeling.
• Proven experience with ontology and semantic data modeling using RDF 1.1, OWL 2 and SHACL.
• Experience with entity resolution and semantic alignment, normalizing heterogeneous data into a typed symbolic graph.
• Background in formal constraint reasoning, including SMT solving concepts such as Z3.
• Advanced proficiency in English.

Required skills

• Strong, production-grade Python.
• SPARQL and RDF store operations (e.g. Oxigraph or Apache Jena/Fuseki).
• Nice to have: NLP and embeddings, LLM integration for hypothesis generation, knowledge graph engineering at production scale, formal methods or logic programming (Prolog, Datalog, ASP), explainability and provenance system design, Langfuse and OpenTelemetry.

What we offer

• 100% remote work from anywhere.
• Excellent compensation in USD or your local currency if preferred.
• Hardware and software setup for working from home.
• Flexible hours and paid parental leave, vacations and holidays.
• Mentorship, promotions and skill development in a multicultural environment.