Leo Kettmeir

I am a software engineer at Deno, where I've implemented key Web APIs—including WebSocket, WebGPU, and Web Storage—and contributed to core runtime features.

I focus on improving developer experience through tooling and documentation.

Additionally, I am the lead maintainer to jsr.io, a modern alternative to npm, where I lead work including documentation tooling and registry infrastructure.
I also am a delegate at TC39 and TC55 representing Deno.