🔗 How Instacart built a modern search infrastructure on PostgreSQL

In a previous blog post “Improving search at Instacart using hybrid recall”, we shared our progress on adaptively combining traditional full text search with embedding-based retrieval. Embarking on this journey required rethinking our search infrastructure to support hybrid recall while ensuring scalability and reliability. In this blog post, we will dive deeper into the architecture and engineering efforts that made this possible and lessons learned along the way.