whats_in_name,
The focus of 485 is on "permanency" of the position, and not "fulltime". As per my understanding, to qualify a position must be permanent = available to the alien forever. I don't believe even a 2 yr contract with an employer qualifies as a permanent position - the very term "contract" nullifies the permanency.
Ofcourse, a consulting firm can have a permanent position that would qualify for 485. But in that case, one needs to be a "permanent employee" of the consulting firm (on W2), not a contractor (on 1099).
hope this helps.
-ab