[TomMarius]

There are no tax brackets in Czechia. Tax is flat 17% + social and health insurance. That wage is now completely ordinary for average senior developer.

Things in Prague indeed did change dramatically in the past 10 years, especially during the last 5, the Prague IT market grew several tens of percent a year during that time. Right now Czechia has the lowest unemployment rate in Europe, and looking for a good developer indeed is very desperate (I am responsible for hiring from my position - which I hate to do, because it's nearly impossible).

Culturally, I think you should try Prague for a month or two again. The city did change a lot, including a large influx of new people (several hundreds of thousands in the past 10 years have immigrated into Prague).

I remember Prague of 10 years ago (I was born in a smaller city in Czechia) and it was a place I did not like. Today's Prague is awesome.