Microsoft is not rewriting Windows in Rust
Peter Sayer
Dec 24, 2025
2 mins
A job posting by a Microsoft engineer sparked excitement about a project “to eliminate every line of C and C++ from Microsoft by 2030”, replacing it with Rust — but alas for fans of the
memory-safe programming language, it turns out this is a personal goal, not a corporate one, and Rust isn’t necessarily even the final target.
Microsoft Distinguished Engineer Galen Hunt posted about his ambitious goal on LinkedIn four days ago, provoking a wave of excitement and concern.
Now he’s been forced to clarify: “My team’s project is a research project. We are building tech to make migration from language to language possible,” he wrote in an
update to his LinkedIn post. His intent, he said, was to find like-minded engineers, “not to set a new strategy for Windows 11+ or to imply that Rust is an endpoint.”
Hunt’s project is to investigate how AI can be used to assist in the translation of code from one language to another at scale. “Our North Star is ‘1 engineer, 1 month, 1 million lines of code’,” he wrote.
He’s recruiting an engineer to help build the infrastructure to do that, demonstrating the technology using Rust as the target language and C and C++ as the source.
The successful candidate will join the Future of Scalable Software Engineering team in Microsoft’s CoreAI group, building static analysis and machine learning tools for AI-assisted translation and migration.
But an internal research project is looking at ways to automate the translation of millions of lines of code per month into other languages.
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