**Overview**

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 Senior Site Reliability Engineer, you will lead reliability improvements across multiple services or components, solving complex, cross-cutting operational problems. You are recognized as a subject matter expert in your area and lead by example through strong technical judgment, ownership, and accountability.

You will influence service architecture, define reliability strategies, mentor other SREs, and drive meaningful reductions in incidents, toil, and operational risk—partic...