About

I'm Jim Jonah. For twenty-something years I've built the systems other systems depend on — identity, developers tools including editors, parsers and interpreters, distributed platforms, e-commerce, advertising & marketing tools, and performance tooling. The domains may have changed but the goals are almost always the same: build things that are fast, secure, maintainable, "just work", and solve business problems.

How I work

I'm hands-on by choice. I try to lead by setting a good example, writing code, reviewing code, pairing with other developers to help spread the knowledge, and do what it takes to unblock others — not by leading from a distance. Most of what I'm proud of is infrastructure you never notice, because it just works.

What I write about

Public writing is new for me. Most of what I work on is a trade secret — but not all of it. The goal is to spread knowledge on this that I got tripped up on that I could help others.

Elsewhere

You can find me on Bluesky and LinkedIn, or see what I'm building on the Selected work page.