From the perspective of a french dude, 90k£ is something like 101k€, which is an INSANELY good salary.

For comparison, i'm actually paid 25k€ with 2 year of experience (Junior software developper), and a really good salary in this field in France is something around 48k€

Last point, the minimum salary in France is 1.5k€ per month, around 18k€

I believe it widely change depending on the country.