In Amsterdam: cheapest rooms I've found (not apartments, rooms) are 650 euro's. If you can get these you're really lucky.
Salary for entry level is 1600 net. This goes up to about 2300 to 2500 after 3+ years of experience (that's truly the fastest trajectory forecast FYI, it's more like 5 years).
Alright, so let's live somewhere cheaper in The Netherlands. The cheapest I could find that's in reasonable distance of Amsterdam (that's where the jobs are) is about 500 euro's.
So how do you do it? I want what you have as well. Heck, I'd live in a simple garage with very basic amenities if I'd have to.
Edit: I've tried to apply to startups in the US, there are no takers because of the visa restrictions. I've also applied to FAANG, also no takers. I have 3 CS or CS-related degrees (1 bachelor, 2 masters) and 1.5 years of work experience.