Microsoft Teams is seeking a Principal Software Engineer to join their platform team, working on one of the fastest-growing products in Microsoft's history. The role focuses on the Teams Platform that integrates developer innovation, including Teams Apps, conversational bots, and rich canvases, all built using Microsoft Graph and AI capabilities of Microsoft Copilot. The position involves working on complex problems, interfacing with the developer community, and building the teams store ecosystem. The ideal candidate will have extensive experience in backend services, distributed systems, and modern web technologies. This role offers the opportunity to work on large-scale systems that impact millions of users worldwide, while being part of Microsoft's inclusive culture that values respect, integrity, and accountability. The position includes significant technical leadership responsibilities and the chance to mentor other engineers while working on cutting-edge technology.