**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, security, and compliance for some of the world’s most demanding workloads.

We are seeking a **Principal Software Engineering Manager** to lead a mixed organization of **Site Reliability Engineers** and **Software Engineers** responsible for building and operating Substrate services across highly regulated and enterprise-critical environments. This role requires strong technical depth, operational judgment, and people leadership, with the ability to scale impact through managers while remaining deeply connected to engineering fun...