Outside of the UK you might be lucky to get €50-60K even when working for US firms on average this includes Germany.
Some Nordic countries have higher salaries but the CoL is pretty steep.
Overall if you don’t include taxes it’s possible to get competitive salaries in the UK and some parts of Europe once you take into account income tax and VAT you’ll the race isn’t nearly as close anymore.
Also startups do not pay well at all and equity is nearly unheard off even for single digit non-founder employees.
Seriously here in Norway getting over 100K € annually is becoming normal. If you are really talented, then you can even make 150k € annually. Freelancers make over 200k € annually. There is a huge shortage for developers these days, much thanks to "digital transformation" trend.
Norway has a higher cost of living due to the 25% VAT, and because the national (non-developer) median salary is so high. Not to mention vehicle and gasoline taxes.
The average compensation for engineers is about £100,000 - some above and some below. This is on top of private medical and dental, generous pension contributions and a number of other benefits.