Senior Data Engineer (Knowledge Graph)
Stefanini is hiring a Senior Data Engineer (Knowledge Graph) to join one of our Portugal-based clients in Lisbon.
- Work model: onsite in Lisbon;
- Role duration: 12 months;
This client is building the semantic and graph foundation for an AI-native procurement platform. This role defines and evolves the ontologies, knowledge graphs, and context graphs that allow applications, analytics, workflows, and AI agents to understand procurement data consistently.
You will model the business meaning, entities, relationships, events, and context that sit beneath the platform’s intelligence layer. This is not dashboard semantics. This is the semantic backbone for retrieval, reasoning, agent orchestration, workflow automation, and decision support.
Role Responsibilities:
- Define and maintain procurement ontologies covering entities, attributes, relationships, events, states, and business concepts.
- Own the semantic model for core domains such as suppliers, contracts, obligations, sourcing events, categories, risks, savings, and operational workflows.
- Design and evolve procurement knowledge graphs representing entities, relationships, dependencies, events, and business context.
- Define context graph patterns used to assemble relevant information for users, workflows, retrieval systems, and AI agents.
- Model temporal relationships, lifecycle states, provenance, hierarchy, ownership, and dependency structures explicitly.
- Define graph construction patterns linking structured data, documents, communications, workflow events, and external signals to canonical entities.
- Establish approaches for entity resolution, supplier normalization, deduplication, identity management, and relationship confidence.
- Define validation rules and quality exp...
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