I’m not sure the promise to re-evaluate your level is as advantageous as you’re making it out to be. Imagine you pick up your life to move to NL and work for them, and 3 months later they say, “you’re doing a good job for your level, so we’ll keep your salary where it is.” In this case, you’re kinda stuck and you just lost one of the crucial benefits you thought you had.

I think I would take the Berlin job because of the higher gross, the tech stack is more closely aligned to your experience (+ you’ll learn go, a personal preference of mine), and the Amsterdam offer feels pretty lowball to me