You'd be fine. Everything here (products etc.) have to be in at least two languages. In a city like Zurich, you'd get along very well in English only. Also, there are many companies around that have English as their "company language" (for instance Google) .
Btw. Google-Maps was largely developed by Zooglers (Google's Zurich office). They call it also "the real mountain-view".
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If you're from the EU and looking for a tech-job over here, I'd be happy to help out
How important is it to speak German?
You'd be fine. Everything here (products etc.) have to be in at least two languages. In a city like Zurich, you'd get along very well in English only. Also, there are many companies around that have English as their "company language" (for instance Google) .
Btw. Google-Maps was largely developed by Zooglers (Google's Zurich office). They call it also "the real mountain-view".