Usually at smaller companies with just a handful of developers. Can be a "start-up", or just a smaller business running fine with small teams. Or sometimes in a larger company where there's a small team doing its own thing.
There's up-and-downsides to everything. The pay is usually less, and "fewer processes" often also means fewer processes surrounding HR and such. This can mean you're subject to the whims and mood swings of one person. I was once fired over a pretty far-fetched misunderstanding, but 1) they didn't mention it because "I should know myself", so I didn't really have a chance to clear it up, and 2) when I got fired they agreed it was a complete misunderstanding and that they made a huge mistake, but fired me anyway because that was the road already taken now. Great ... thanks ... It's hard to imagine that happening at a larger company with an actual HR department and stuff.
Also: a Wikipedia-esque "be bold" attitude helps. Obviously refactoring things just for the craic isn't a good idea, but if there's something that can really make an impact then I'd just do it and send a PR, regardless of what I've been assigned. Obviously "refactor everything" on your own initiative isn't a good idea, but usually there's tons of smaller stuff that really helps: "introduce new function/package that helps reduce boiler plate", "split up this difficult to understand function", things like that.
Most PMs will realize they don't have a 100% in-depth understanding of the code, and will trust you when you say it helps you do your work better. Usually it's fine as long as you apply proper judgement and don't spend too much time on it. That said, there are some places where this really isn't appreciated regardless. IMHO that's pretty dysfunctional and when I start looking for somewhere else to work.
There's up-and-downsides to everything. The pay is usually less, and "fewer processes" often also means fewer processes surrounding HR and such. This can mean you're subject to the whims and mood swings of one person. I was once fired over a pretty far-fetched misunderstanding, but 1) they didn't mention it because "I should know myself", so I didn't really have a chance to clear it up, and 2) when I got fired they agreed it was a complete misunderstanding and that they made a huge mistake, but fired me anyway because that was the road already taken now. Great ... thanks ... It's hard to imagine that happening at a larger company with an actual HR department and stuff.
Also: a Wikipedia-esque "be bold" attitude helps. Obviously refactoring things just for the craic isn't a good idea, but if there's something that can really make an impact then I'd just do it and send a PR, regardless of what I've been assigned. Obviously "refactor everything" on your own initiative isn't a good idea, but usually there's tons of smaller stuff that really helps: "introduce new function/package that helps reduce boiler plate", "split up this difficult to understand function", things like that.
Most PMs will realize they don't have a 100% in-depth understanding of the code, and will trust you when you say it helps you do your work better. Usually it's fine as long as you apply proper judgement and don't spend too much time on it. That said, there are some places where this really isn't appreciated regardless. IMHO that's pretty dysfunctional and when I start looking for somewhere else to work.