Principal Software Engineering Manager

Microsoft 365 Copilot is a groundbreaking productivity experience powered by large language models, Microsoft Graph, user data, and the web. At the heart of this innovation is the M365 Copilot Platform, which designs and operates the agent runtime and shared platform capabilities that enable Copilot experiences to scale consistently across M365 spanning Outlook, Teams, Word, Excel, PowerPoint, and more. Our team is building a modular, event‑driven platform that raises the bar for agility, reliability, and composability across every Copilot experience.

We are looking for a Principal Software Engineering Manager to help lead the delivery of the next generation of the M365 Copilot Platform. In this role, you will own the technical direction and execution of critical platform investments, including core runtime capabilities, real‑time multimodal orchestration, long‑running task durability, and self‑serve partner tooling that unlocks safe, rapid innovation across the Copilot ecosystem.

As a Principal Software Engineering Manager, you will lead and grow a team of engineers while remaining deeply engaged in technical decision‑making. You will set architectural direction, drive design reviews, and ensure high‑quality execution across platform services that other agents and teams depend on. You will partner closely with PM and cross‑functional stakeholders to translate platform strategy into clear roadmaps, deliverables, and outcomes that scale across first‑party, flagship, and third‑party agents.

In this role, you are expected to bring a deep understanding of distributed systems and platform design, and apply those principles to build high‑quality, observable, and resilient services. You will ensure the platform adheres to M365 Core engineering standards, is delivered with the right guardrails, and continuously earns customer trust through reliability and correctness.

This role offers the opportunity to operate at the core of M365, where your leadership directly shapes how Copilot agents are built, deployed, and scaled across the ecosystem. The problem space spans runtime and orchestration, real‑time multimodal systems, API and protocol design, and developer experience—at a scale where your decisions have broad and lasting impact.

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.

Responsibilities