It's not like Germany doesn't have immigration... There's the whole pool of the EU who can pretty much immediately start working in Germany. Immigration for skilled workers in Germany with employment prospect is far easier than for a lot of other countries (certainly easier than e.g. into the US). There's also a significant influx into the work pool from refugees and asylum seekers, although that should certainly happen more smoothly and with more support.

Fortunately there are quite a lot of people in the UK who are wondering which country they’ll be living in around 14 months from now.

Companies I consult are looking all over Europe and have employer branding efforts running in the whole of the EU.

..and they still require fluent spoken German!

This drives me crazy. I could fill a lot of open positions right now. Oops, your candidate does't speak German.

I really really don't understand.

Sorry, that people who speak their own language in their own country bother you so much.

That's just not true in many companies nowadays. E.g. in the automotive industry (which is 1/7 of the german economy) I have a growing number of colleagues who don't speak a word of German.

Well "growing numbers" vs. reall acceptance is quite a long way.

Possibly in Berlin, where is more alien friendly, to be able to get any job in English, in south, especiall south Bayern is quite difficult, even in IT ( which I really don't understant). Might be if all customers are in Germany, then there will be a gap somewhere, which someone has to fill and they don't really want or can.

In bigger companies ( like automotive, or even Siemens ), they do have customers and organisation from all over the world and English is the primary documentation and also common language.

I only wanted to say, that given a perfect candidate for a position, it might be rejected because it doesn't speak German.

Many startup companies in Berlin are English speaking as their daily operations.

The point is if the majority of people are native German speakers you take a major productivity hit moving to English, say 10% which increases your costs and demand for people.

Where are you looking? In Berlin startups often have english-speaking engineering teams.