Market rate for a senior engineer in much, much poorer Poland exceeds 80k at current exchange rates - ask me how I know.

I also had a contract in Switzerland for a brief, beautiful moment and in 2020 it was not weird to have an hourly rate exceeding 90CHF/h in this role.

Permanent employees were making anywhere in the range of 100-130k CHF, so the 140k USD figure is close adjusted for inflation.