Microsoft 365 Copilot is revolutionizing productivity by combining large language models, user data, and Microsoft Graph capabilities. As a Principal Software Engineer in the Microsoft Search, Assistant, and Intelligence (MSAI) team, you'll be at the forefront of developing the central infrastructure that powers various copilots including Microsoft 365 Chat, Word, and PowerPoint. The role focuses on managing the platform for search, ranking, and grounding, ensuring optimal content matching for queries. You'll design and develop innovative software applications, working with distributed systems at massive scale. The position offers the opportunity to shape the future of AI-powered productivity tools while working with cutting-edge technology. Microsoft provides a collaborative environment with industry-leading benefits, professional growth opportunities, and a culture focused on inclusion and innovation. The role combines technical leadership with hands-on development, requiring expertise in distributed systems, cloud architecture, and software engineering best practices.