Prerequisite: you need to be
good and be able to sell yourself as such
Options:
* Work for FAANG in London, Switzerland or even Amsterdam [1].
* Tough one: reskill and work in HFT, base seems to be 60K, the bonus that you get after having proven yourself is sizeable and can be a multiple of your salary (if I have to believe teamblind.com, can't find the source anymore). The hours are more brutal though.
* I've met a freelancer doing this, it's on the gray area of shady (depending on where you land with valuing hours worked versus output delivered): get a cushy 80K job for which 2 hours of work per day is enough. Work like 10 to 20 hours per week, track the 2 hour units of commits into an Excel sheet and commit each day appropriately. For each day when you don't need to stack commits, enjoy your free time! Then, if you want to make more money, get another job or freelance thing and do that after your normal work hours (for legal reasons). It's a variation on the 4 hour work week I guess? I've seen a guy do this, he had no issues with it. He even was called employee of the year, so I guess the 2 hours he put was comparable or even better than the 8 hours of another person. Some people think it's shady since you're not working in the spirit of your contract (doing less hours than promised). Other's think it's fine since you're delivering the output that was implied with the contract.
[1] https://blog.pragmaticengineer.com/