[vonseel]

How hard is it to do this if I only speak English?

I have family in Norway and attended part of a Master's program in Switzerland, but left because the job prospects in Zurich did not look good without German fluency. This was not in technology, though.

[mordaroso]

I live in Switzerland and was working as a SWE at a Swiss company only speaking English. It's actually quite common - especially in Zürich.