Microsoft's Substrate team is seeking a Principal Software Engineer - Architect to join their Directory team, which is crucial to Microsoft 365 cloud business offerings. This role involves working on directory services that enable user access and inter-machine communication within Substrate, collaborating closely with Azure Active Directory. The position offers an opportunity to work on planetary-scale distributed services that impact thousands of businesses and millions of users worldwide. The role combines technical leadership with hands-on engineering, requiring expertise in distributed systems, cloud infrastructure, and microservices architecture. With a competitive salary range of $161,600 - $314,400 (depending on location), comprehensive benefits, and the chance to work remotely, this position offers an excellent opportunity to shape the future of Microsoft's cloud infrastructure while working with cutting-edge technologies in a collaborative, global environment. The ideal candidate will bring both technical expertise and leadership skills to drive innovation and maintain high standards of security, privacy, and accessibility across multiple teams.