This is all based on information in this posting. I know nothing about the company or its situation or even if they really are looking for 40+. I'm just generally suspicious about this sort of recruiting.
If I were a Perl developer who wanted to live in Amsterdam, I would be scared of a place looking for 40 people - it means that their management is doing something nonsensical.
Unless this is their humorous way of celebrating the 35th anniversary of the Mythical Man Month...
40 salaries + X! That's at least ~2mio down the drain, even if someone comes to their senses and pulls the plug within the first year.
Comparing http://www.wolframalpha.com/input/?i=PCLN+GOOG shows size-related statistics that are about 10% of GOOG, whatever that may mean in reality given the difference of marktes in which they operate.