If you have quite a few lay-overs per month you may expect to get around 25000 sek net. I made more loading their bagage.
They do not take your previous experience into consideration and the salary increases with (I think) roughly 1600 sek per year before tax (appr. %30) so if you have intrests/mortgages to pay then I would look for something else, unless you can live in Stockholm cheaply (take costs of living in Berlin and pretty much double it if you own a car and go out for a beer once a week).