If you did "web stuff" in the early 2000s (like 2005-2010). You'd probably know who he is. He did Ruby on Rails, a backend web framework.

But that was also very Start-up and America focussed. So if you did web dev in some other country and didn't have colleagues who were into that culture you still might've missed the name.

https://en.wikipedia.org/wiki/David_Heinemeier_Hansson

To be fair, I don't think anyone outside the Ruby community knew who DHH was until his politics went viral on twitter

Ruby on Rails creator (among other things).

DHH markets himself much better. His company (basecamp), in a sense, revolves around his public persona and he's unapologetic about this. It's the same with all of his projects (e.g. Omarchy recently).

Yeah, same.