Microsoft Security is seeking a Principal Software Engineer to join their Azure AD team, which serves billions of requests daily for core authentication and programmability. The role focuses on evolving the directory store platform to meet future decade needs. You'll work with cutting-edge technologies in storage and distributed systems, applying innovative algorithms for scale and performance. The position is based in Redmond, Washington, with hybrid work options. Microsoft Security aims to make the world safer through end-to-end simplified solutions, protecting users, customers, and developers. The role requires expertise in distributed systems, cloud technologies, and strong programming skills. You'll be part of a culture embracing growth mindset and excellence, working on innovations impacting billions globally. The position offers competitive compensation, comprehensive benefits, and the opportunity to work on critical security infrastructure at scale. The ideal candidate will have strong technical skills, experience with large-scale distributed systems, and a passion for security and performance optimization.