Microsoft Substrate is the foundational cloud platform that powers many of Microsoft’s most critical services including Exchange Online and M365 Copilot, providing shared infrastructure, identity, messaging, storage, and service-to-service capabilities used across Microsoft 365 and related cloud offerings. Substrate services operate at global scale and are designed to deliver high availability, reliability, and security for some of the world’s most demanding workloads. As a Principal Site Reliability Engineer, you will set technical and operational direction for reliability across Substrate workloads. You operate at broad scope, influencing architecture, reliability strategy, and engineering practices across teams and organizations. You are expected to lead complex, multi-year initiatives; shape how reliability is designed into systems; and act as a role model for technical excellence, leadership, and Microsoft values—particularly for services operating in regulated, sovereign, or compliance-sensitive environments. Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.
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Job Type
Full-time
Career Level
Principal
Education Level
Ph.D. or professional degree