Engineer: 40k and up, team lead: 70k and up, project manager: 90k and up. I don't have much data on other roles but the 'and up' is the big factor, depends on seniority and specific skills. What really strikes me is that an extremely high fraction of the people that work there speak highly of their employer.
I'm sure Google or FB would pay more, especially if you're prepared to move the USA.
Other 'big companies in NL' can pay crap or good depending very much on the company, the field they are active in and the kind of job you are looking for so that's a bit too generic to do something with. HTH.
There's body shops in Eastern Europe that pay more for junior frontend developers...
It doesn't make sense to be a software engineer in that country, unless you prefer looking at a screen all day over working with people.
I agree it's low given even a team lead role, but it depends on how many are on the low end of their pay scale.
I don't think these numbers are exceptionally high but they're not low either.
Source: Former SWE, current PM in the Randstad.