If you're an even remotely competent developer in a language used by more than one company, have a reasonably firm grasp of the English language, can work with others reasonably well, and can be bothered to apply for jobs, then there are definitely plenty of opportunities for your skills. Plenty of companies don't even care about the language, they figure you'll pick it up. The only way this isn't true is if you are already hugely overpaid or if you come off terrible in interviews. A year ago I would have said "or are a convicted felon" but I think plenty of companies don't even care about that anymore, that's how huge demand is. You don't even have to live somewhere with jobs anymore so long as you have a reliable Internet connection!
If you just sit around letting your current company take advantage of you, and complaining about not getting a big enough raise you definitely won't find those opportunities though. You have to interview a lot.
They don't allow me to become an expert by having me be full stack in multiple stacks with frequent context switching. I tend to be slow in the code screens.
If you just sit around letting your current company take advantage of you, and complaining about not getting a big enough raise you definitely won't find those opportunities though. You have to interview a lot.