Wow - I work in Berlin, and your figures sound unbelievable (Also your post seems to be before Euro lost some value, so in current Euro-CHF exchange rate - you are way higher.)

I heard few companies like Zalando can pay in that range for good developers. Most of the IT companies in Berlin seem to be startups with no/limited funding, thus low salary.

Around 50-55k Euro gross is enough to live comfortably. Even for someone who came here from Asia, I find grocery stuffs, beers etc very cheap. Rents are going up, but still cheap. I live in 42 meter square studio flat for around 500 at the centre of the city (current rate should be between 600-800).