If they're operating an aircraft that requires two pilots then, no, you can't be PIC in that time. Presuming you start with 0 hours, do ~200 + a bit in training (even 250) then work for a year and do *maximum* hours you still won't have achieved at least the 1500 hrs needed for ATPL. An ATPL is a prerequisite to be PIC for a two crew type a/c.
Similarly you also need at least 250 hrs command time for the ATPL. You'll have 70 hrs post training then all your working time with be co-pilot time so short on that aspect as well.
I tend to see these sorts of schemes as a cheap way for them to get co-pilots. You don't have a permanent job at the end of it, just a bunch of co-pilot time & insufficient command time to advance your licence.