I thought about moving to Berlin and did some research. Median salary for a Senior Software Engineer is 86k EUR in Berlin according to Glassdoor. You will pay ~48% in taxes (depending on your Tax class), so it will be around 3700 net per month with an avg rent ~1500 EUR. So it's like 2200 EUR left, and you are supposed to have a life (and even make some savings) with that money. I don't know how this is fine to be honest. The only reasonable way to do it is to have this salary when you live in a more cheaper place with a better tax regime.