Not currently hiring that I know of. FO pay is $20K with per diem ($18k without) and it is salary. If not typed on the Saab, it is PFT. No idea on Capts. Upgrade seems to be based on right place/ right time rather than seniority. There are scheduled runs with 2 to 6 flying hours a day. They also do some charter work as well but obviously the flying is more sporadic with that.
To get hired you basically have to be local to MIA/ South Florida area, otherwise you get put in the 2ft. tall stack of resumes...