Doug Turnbull is a consultant in search technology and relevance engineering, most recently as Principal Engineer at Daydream, where he builds hybrid search systems combining lexical and vector retrieval, and develops LLM-driven quality programs for e-commerce search. Previously, he led machine-learning-driven search initiatives at Reddit, significantly improving search relevance. And before that Shopify.

Doug loves a lot of VectorDBs from Pinecone, Weaviate, Elasticsearch, OpenSearch, Vespa, and Turbopuffer, and other systems and is excited to share what tool he reaches for it what situation.