Earlier quoted context omitted.
Do you know the language? Is it necessary to in order to feel that life is as fast-paced as you mention?
Absolutely. I would not say Korea is a good place to be in as a developer. Mostly dominated by Korean corps. Some companies started my foreign ethnic koreans. They are good and nice places but pay is ...mediocre. Koreans are also a bit racist but if you do not mind it's fine.
sure, it's no Silicon Valley but you can get decent/well paid jobs with a bit of trying. My salary was even slightly better than what I made in Germany before