In my experience, as some of the others have said, yes, they do. The developer at my last company was in his 40s and still had that mentality. What you will f

In my experience, as some of the others have said, yes, they do. The developer at my last company was in his 40s and still had that mentality. What you will find, though, is that there's a tradeoff there, because not everyone does; as you get older, you're less inclined to work 80 hours a week for a project (unless it's your own.) At the new company, we hire for cultural fit, and this means we tend towards (but aren't exclusive) people around our own age (27, on average). But we have a fairly wide distribution around that.