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. We are looking for a Senior Software Engineer to design, evolve, and modernize the core systems that power Copilot. If you're passionate about building ultra-low-latency, high-throughput services that run on a global scale, thi