Oh sorry, I am a developer but I forgot to take into account the cost of living too, in my country the minimum salary for a junior developer is 400 dollars, taking into account the cost of living, only the rent and basic services cover almost 3 / 4 of the salary. I don't know how the cost of living in the Netherlands will be, but in my country it is very expensive.
This is the big factor between locations. Rent for a two bedroom apartment in Amsterdam is 1500 euro/month. And income tax in the Netherlands is 40-52%. So a 4000 gross per month isn't much.
