Why Microsoft Is Recruiting Rust Architects to Rewrite Windows Core

Microsoft is actively moving its core Windows source code to Rust, a higher‑performance, error‑free alternative to C#.

To advance this initiative, the Redmond‑based tech giant is expanding its R&D team to integrate Rust into Microsoft 365.

Specifically, Microsoft is seeking a principal software architect to lead the Substrate application platform team, a key component of its cloud services.

“We are building a new team focused on using Rust as the foundation for modernizing globally‑scale platform services. We welcome experienced software architects to help us tackle this globally impactful challenge.” The successful candidate must have deep Rust expertise—or be willing to become a Rust expert quickly—contribute as a project‑lead team member, guide technical direction, design and implement Rust component libraries, SDKs, and rewrite existing C#‑based global services in Rust.

The role requires expertise in both Rust and C# and a strong record in complex system design.

Wesley Wiser, a senior software engineer at Microsoft, confirmed the position is not within Microsoft DevDiv.

At last year’s BlueHat event, Microsoft announced plans to rewrite parts of the Windows kernel in Rust for its modernity, ease of use, and overall clarity. New product development also uses Rust in the Azure Quantum Development Kit (QDK), achieving 100× speed improvements and 100× reduction in code size.