In my job - I have nothing meaningful to do and it drives me fucking insane, I'm pulling my hair out of boredom. Got nothing to do that makes me proud at the end of the day. I'm going through Lynda courses all day... Bored. Out. Of. My. Mind. Can't quit either because the pay is too high. I'm stuck. Shit. Crap. Damn it :-(

How do you deal with the fact that sometimes a junior dev will have a better solution than a senior dev because he knows more on the technology/language for this new project? Maybe for this technology he should be the senior one... But how do you deal with these situations?

Went from a c++ backend developer job to a very high paid, very little programming and mostly integration job in the finance industry (big wall st firm). I regret my decision. Money does not make you happy at the end of the day nor does it bring satisfaction. Don't make the same mistake I did. If you're happy as a developer, stick to it, you'll be a lot happier in the long run.