Microsoft Security is seeking a Principal Software Engineer to join their Azure AD team, which serves billions of requests daily and hosts millions of tenants. This role focuses on evolving the directory store platform to meet future decade needs. The position offers an opportunity to work with cutting-edge technologies in storage and distributed systems, applying innovative algorithms for scale and performance. Based in Redmond, Washington, this role combines technical leadership with hands-on development of large-scale distributed software services. The ideal candidate will have extensive experience in distributed systems, cloud technologies, and software engineering. They will be responsible for designing and implementing secure, reliable, and maintainable solutions while collaborating with teams across Microsoft. The role offers competitive compensation, comprehensive benefits, and the chance to work on security solutions that impact billions of users worldwide. Microsoft's culture emphasizes growth mindset, innovation, and collaboration, making it an ideal environment for technical leaders who want to make a significant impact in the security space.