This is a difficult question as it depends a lot on you, the time of year and the location.

In Thailand there are good opportunities for Divemasters as people tend to work for a while and then travel on. There are also opportunities for Videographers and Instructors (speaking another language helps a lot for Instructor jobs).

In Australia, there are good opportunities for Instructors (if you have a work permit), but paid Divemaster jobs are much less available.

Your best option is to try and make a good impression with the dive school and keep your ear to the ground for any openings coming up!