As a Principal Software Engineer on the Microsoft Teams AI Agents and Copilot team, you will lead the design, development, and evolution of scalable backend systems that power intelligent, agent-driven experiences. Microsoft Teams supports over 300 million daily active users globally, enabling seamless collaboration, productivity, and communication across work and life. It also serves as a robust platform for ISVs to build and extend applications and agents within the Microsoft 365 ecosystem. 

We are looking for a visionary engineering leader to drive the next wave of innovation in Copilot and AI agent development. In this role, you will architect and deliver backend services that enable contextual assistance, proactive insights, and triage capabilities across messaging, apps, and collaborative content—transforming how users interact with Teams in an AI-first world. 

You will play a pivotal role in shaping how users engage with high-volume information, designing systems that are performant, reliable, and extensible. Your work will directly influence the productivity and engagement of a diverse global user base. 

You’ll collaborate across disciplines—engineering, product, design, and research—to deliver high-quality, resilient software solutions. If you thrive in a fast-paced, startup-like environment and are passionate about technical excellence, thought leadership, and building systems that scale, this is the team for you.