I've been working as a Sr SWE in Berlin for 3 years, and I network with a lot of others. 60-90k is probably the most accurate range. Developers making 100k+ are in the top 5% of the market in the city. If you're making 100k in Berlin you'd be making 3-400k in the Bay Area.

Taxes are high. You're probably getting slightly less than 4k a month after taxes/insurance. Your apartment/utilities will be around 1200.