Levels.fyi is always very inflated for anything outside of FAANG – to the point where it's not realistic Glassdoor lists the average for SWEs for Madrid at 35k

Levels.fyi is always very inflated for anything outside of FAANG – to the point where it's not realistic Glassdoor lists the average for SWEs for Madrid at 35k€ vs London at £66k (76k€) which even accounting for cost of living is quite a big difference