There are 2 float airlines in the Maldives: Maldivian Air Taxi (the red planes) and TMA (the yellow planes). They're based right next to each other in Male.

About 2 years ago MAT advertised for FO's. The ad said that you needed a single-engine sea rating, and no minimum seaplane experience. When I talked to the recruiter, he said that competitive mins were actually a multiengine sea rating and a couple hundred hours on floats. They hire mostly guys that get their experience in Canada and Alaska. No, Canadian license is not required.

Google "barefoot pilots" They have a forum and site full of photos of the flying. Good luck.