Very common, worked Netherlands, Belgium and Germany for ~10 years, doing 200k eur annually on average, contracting, Python, Java, senior dev, devops, etc. My immediate contracting colleagues, about 20 guys and gals are doing comparatively (I.e., ~90 to 120 eur rates, ~2000 hours a year).

Edit: apparently very common for my bubble at least, no idea if this is “normal” In Netherlands, Belgium and Germany..