Earlier quoted context omitted.
Go for it! I'm working a 30-hour week right now. Like you, I feel even 40 hours/week of pure coding ist just not sustainable. Out of the 3 software dev jobs I had up to this point all the people that 'worked' over-time were just wasting more time drinking coffee and chit-chatting with colleagues. Most of the time I just want to put in a productive day, solve 1 or 2 problems and then go home at a reasonable time, so I…
> I'd actually be willing to work a 40-hour week again, but only if my job then gives me responsibilies beyond just being a coder. Why would they do that? You don't seem to have shown any initiative or demonstrated how well you would take on extra responsibility.
I bet you, if you were to ask my boss if I've proven a valuable asset to the company he would sing you a song of praise for my work.
Working long hours isn't everything.