Yuki Tanaka

Yuki is a former Stripe data engineer (2017-2022) who spent her last eighteen months there building the internal Airflow-to-dbt migration tooling used by the revenue team. She left to join a 12-person AI startup as employee #4, where she shipped a LangChain-based contract-review pipeline now processing roughly 40,000 documents a month for mid-market legal teams. She's deep on the retrieval side: chunking strategies that don't shred tables, hybrid BM25+dense rerankers, and the surprisingly hard problem of evaluating RAG quality without paying for human raters. Her PR adding parent-document retriever support to LlamaIndex's PostgreSQL store landed in late 2024. Nine years in data and ML platform work. Based in Seattle, mostly writes Python, reluctantly writes TypeScript when n8n forces her hand.