But all things depend on the individual companies, in some startups you won't get to hire. And for my luck, of the 2 large companies where I worked there was no chance of flex-time, or remote - or any kind of non- 9-5 schedule even for devs. On the other hand at 1 of them everyone left at 5 on the dot cause no one cared about their jobs - and a strict 40 a week feels like vacation a lot.

I think regardless of where you go you have to pick wisely (and I only picked large because my options where limited and the salaries where good.).

But as a rule small - not just startup, means you have more power and control over yourself and your fiefdom. And that freedom is what you like that's where you should go. (Or research - there's a lot more paperwork with research teams, but there's a lot of freedom as well.)

And yes - if you like writing good code you are proud of years later a big co is good place to do it. At my government gig, we wrote prototypes we'd knew would have to be thrown away, perfectly - because really why not? There were no hard to meet deadlines, or particular concerns about the grants running out. So we built things we'd be proud of, every time.