Overview
Microsoft 365 carries a large share of the world's business communication, and almost none of it reaches a mailbox without passing through Substrate Transport. We are looking for a Senior Product Manager to own a core area of that pipeline: to set its direction, define what we build, and carry the work through to an outcome that customers and the business can measure.
This role suits someone comfortable with depth. The problems are technical, the systems are hyper scale and long-lived, and the right answer usually depends on evidence you go and find yourself. In return you get genuine ownership of a service every Microsoft 365 customer depends on, and a team that expects you to lead rather than coordinate.
Substrate Transport is the engine that routes, filters, and delivers the messages that flow through Microsoft 365. Our mission is to move mail reliably, safely, and efficiently at planetary scale, and to give the workloads built on the platform they can depend on without having to reason about the plumbing underneath.
The team's scope follows the full path a message takes: submission and ingestion, routing and categorization, policy and compliance enforcement, hygiene and anti-abuse controls, and final delivery to a mailbox or an external destination. It also covers the connector and hybrid surfaces that customers configure themselves, the volumetric and throttling controls that keep the service healthy under load, and the continued modernization of infrastructure that predates the cloud era.
This position is based at the Redmond campus with 3 days per week work in the office and 2 days per week work from home. Domestic relocation assistance is available.
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
You will own a focus area within the transport pipeline from definition through shipped outcome, working alongside engineering leads, partner PM teams across Exchange Online and Microsoft 365, and the service engineers who keep mail flowing every day.
Define the productSet the strategy and roadmap for your area of the pipeline, grounded in customer promises rather than in a feature list. Write the specs that engineering builds from, state the hypothesis each investment is testing, and say plainly how you will know whether it worked.
Align the business and technical strategy for the area, including how it fits the broader Substrate and Microsoft 365 direction, and make the trade-offs between short-term relief and the long-term architecture the service needs.
Drive executionRun your area through the full engineering lifecycle: scope, safe rollout, telemetry, and the operational readiness a serv
