Hi, I’m Yunfei. I like open source, and I’m just a programmer for fun.

I’m building Rolldown at VoidZero / Cloudflare. Before that, I helped build Rspack.

I build whatever I find interesting. I mostly write Rust, JavaScript/TypeScript and work on frontend toolchains. You’ll also find me hanging around

• Vue

• LLMs / AI

• Video Games

You can follow me on

• X

• GitHub

where I post what I’m working on and whatever’s on my mind.