Firstly, where can you work? i.e. what passport do you have? Can you get visas?
Secondly, where do you want to work as an airline pilot?
Both those questions will help narrow down the suitable places to train.
On the face of it, I would suggest Australia. The CASA licence is recognised in Asia. Perth is close (relatively) to Singapore but don't overlook Adelaide etc.
Work wise post training, there is instructing or you can try your luck in the Territory or Kimberley as a bush pilot. A lot of fun, lots of hours and great experience.