Writing by Perttu Lähteenlahti

I've been writing on the internet for over a decade, and this is where it all lives — 98 posts on software development, cognitive science, and design, plus the occasional detour into whatever I couldn't stop thinking about. Most of it is published here, but I've also written for RevenueCat and Expo, and those posts are pulled in below too.

The list is everything mixed together, newest first — posts written for another publication are marked with its logo and open on that site, and the rest live here on perttu.dev. Writing is how I figure out what I actually believe, so I revisit and revise old posts often. If something here is wrong, unclear, or just sparks a thought, I'd genuinely love to hear it — it helps my writing, and more importantly my thinking.