Principal Software Engineer - Data

📋 Description Own the data platform end to end, including the semantic layer Set the architecture and write much of the code Raise the engineering bar, working directly with the Head of Engineering Own entity models, ontology and knowledge graph, through to APIs Own data foundations: enterprise ingestion, data contracts, schema evolution, orchestration Ensure correctness and reliability in a multi-tenant product, including recovery from hard incidents 🎯 Requirements Experience building and owning data platforms or semantic layers in production (knowledge graphs First-principles systems reasoning: durability, failure/recovery, and scalability Built something from zero at a startup and took it to production scale Ability to write production code and work fluently with AI coding tools Clear communication and presence to lead senior engineers without authority Nice to have: Property graphs or RDF/SPARQL; entity resolution or master data; Spark, Kafka, Flink