Prasanna Vijayanathan and Renzo Sanchez-Silva, both Engineers at Netflix, presented “Ontology‐Driven Observability: Building the E2E Knowledge Graph at Netflix Scale” at QCon London 2026, where they d

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Netflix engineers Prasanna Vijayanathan and Renzo Sanchez-Silva presented at QCon London 2026 on their ontology-driven observability system. They described building an end-to-end knowledge graph that models the Netflix user experience as a connected graph of users, clients, services, and infrastructure. The system uses a triple-based data structure (Subject | Predicate | Object) across 12 operational namespaces to unify siloed observability data. A 'Knowledge Flywheel' with Observer, Enrich, and Infer states continuously encodes operational knowledge, with Claude used as a co-developer to propose code changes via pull requests. The goal is to reduce incident resolution time, automate root cause analysis, and eventually enable self-healing infrastructure.

QCon London 2026: Ontology‐Driven Observability: Building the E2E Knowledge Graph at Netflix Scale