My name is Linus.

I research and build software tools and interfaces to help us think and create.

I’ve been writing online since 2014 – this blog is home to a half million words I’ve written about software research, creative work, community, and the life I live in between.

Over the years, I’ve built well over 100 side projects, from programming languages and compilers to 3D renderers, interactive learning environments, UI libraries, and a suite of personal productivity tools I depend on every day.

Elsewhere on the web, I also write more technical posts on software and some short fiction and other literary vignettes. Outside work, I play the piano and guitar – you can find my music on Spotify and at I also dabble in digital art. I grew up in Korea and Indiana, went to school in Berkeley, and currently live in New York City.

Previously, I was a software engineer at Replit, Hack Club, and Spensa.


Go Time, Go beyond work Dec '21

GopherCon, When Toy Languages Grow Up Dec '21

Metamuse, Self-made tools Nov '21

The Changelog, Building software for yourself Aug '21

GopherCon EU, When Toy Languages Grow Up May '21

Get in touch

I’m most active on Twitter and GitHub as @thesephist. The best way to contact me is either through Twitter, or my email at my first name @