Staff AI Engineer (Data Ontologist)

TELUS Digital is seeking an AI Engineer / Data Ontologist to design and operationalize the semantic and contextual foundations for intelligent AI systems. The role involves building context architectures, ontologies, knowledge graphs, and optimizing LLM-based agentic systems. This is a fully remote position open to candidates based in Brazil.

• Design and implement context architectures that enable AI systems to access and reason over enterprise knowledge.
• Develop and maintain ontologies, schemas, and knowledge representations for structured domain knowledge.
• Optimize context assembly pipelines including retrieval strategies, memory handling, and prompt composition for LLM systems.
• Collaborate with AI Engineers and Data teams to align embeddings, chunking strategies, and vector storage with semantic design.

• Strong experience in designing semantic systems, ontologies, or knowledge graphs within complex data environments.
• Hands-on experience with knowledge representation techniques like taxonomy design and entity-relationship modeling.
• Experience working with LLM-based systems, particularly in context engineering, RAG, or agentic AI architectures.
• Deep understanding of embeddings, vector databases, and related technologies.