Overview We are the Store Team within Microsoft's Substrate Storage Fabric-the core platform that fuels Microsoft 365 experiences, from the latest AI-powered Copilot innovations to Outlook and Teams, etc. Our team delivers ultra-low latency data access at massive scale, serving billions of requests per day that keep Microsoft 365 responsive and intelligent. We own and evolve the full query stack: query planning and indexing, search execution, availability, and performance optimization. Every m