As everywhere salaries vary wildly (as they should), but an uneducated "scriptkid" without experience probably makes EUR2500/mo, a 5yr exp collage educated developer makes EUR3500-5500 and top devs of course make much more than that in some industries. It all depends. "Rent" is pretty much unheard of since getting an apartment to rent in central stockholm is impossible due to rent control, so if you move to stockholm to work in tech you most likely sublet someone's apartment at EUR750-2000/mo depending on size and location. A single bedroom apt in central Stockholm is ~1000.