I met a couple of postdocs and such who didn’t speak German (and, in some cases, their English wasn’t all that good either) during my undergrad in Berlin. I gue

I met a couple of postdocs and such who didn’t speak German (and, in some cases, their English wasn’t all that good either) during my undergrad in Berlin. I guess it’s possible in larger companies or universities and larger cities where people are used to a fair deal of non-German speakers. But I wouldn’t suggest moving here permanently without knowing, or at least planning to learn, some German. After all, it’s a nice language with a decent amount of original content and if English is your native language probably one of the easier ones to learn.