For all I knew few years ago (flying a turboprop in the area),speaking french is a must.
They have a lot of turnover in the crew ,it is quite an intense job doing the legs between Stbarth ans stmarteen.
Young pilots are recruited with min experience stated on internet and more.
I will say a salary around 2000 euros per month total ,they use to help you finding a flat affordable although expensive because in SBH everything is expensive.
Basically you fly as much as needed for the company during 5 days in a row then 2 days off.
Maintenance for islanders is decent,and for the experience it is very nice in your life being there for a while.
If you do not speak french look for companies in st marteen ,antigua and anguilla...all english speaking islands(sorrydon't know ttem left the caribean a while ago).
Have fun...