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Hi, I’m Charlie Marsh.

I’m building high-performance developer tools for Python, starting with Ruff, an extremely fast Python linter written in Rust.

I was most recently a staff software engineer at Spring Discovery. Before that, I was a senior software engineer at Khan Academy.

This is a collection of notes and blog posts I’ve written on Notion:

You can find me on Twitter.

For older posts and projects, check out my personal site.