These jobs don't go to people off the street, it's all word of mouth stuff, and any professional proofreader would bite someone's hand off for a full time contract.
The fulltime contract part sounds weird. I wonder if this is EU funded. I took part in a EC funded project (big mistake) and it was a major bureaucratic nightmare trying to fit their rules into the Polish system.....
Mafketis will know better
Not necessarily. I really don't actively seek out translation or proofreading work, it just comes to me of its own accord (at highly irregular intervals).