Something smaller like Jetstar or Qlink
I understand that each airline has over 1000 pilot applications on their books, most from experienced pilots. I doubt if you could jump the queue even for a interview. 777 co-pilot time is not worth anything in Australia.
However if you have 500 hours minimum real command time on light piston or turbo-prop twins (not ICUS which is regarded as fake time in many people's minds) you might strike lucky and get an interview in a general aviation outfit. Even then there will others in the queue before you. There is a hopeless oversupply of relatively experienced pilots already in Australia looking for jobs.
Other than that it might be worth spending money on a grade 3 flying instructor course and then travel around looking for an instructing job on a Cessna 152, 172. In other words count on starting all over again from the bottom.
While this all sounds a bit pessimistic, you'd better believe it.