At Qantas, all door opening is conducted by ground staff.
The main reason for this is the A380, 747, 767, A330 all disarm automatically when opened from the outside (so as long as things are working well, it wouldnt matter if the door was indadvertantly left in the armed mode - as it would disarm as soon as the ground staff open it)
The only exception is the 737 with manual arming, the cabin crew crack the doors on arrival, but the ground staff still operate the doors after they are cracked.
I asked the question at eps some months ago, there hasnt been a cabin crew related accidental slide deployment in years. But apprarently one caused by an engineer.