It is in the advert, where it says, requirement 500h CS25 aircraft. It is very unlikely that cadets will be hired this year, but of course, you never know.
The advert says , I quote : "
Advantageous but not mandatory". I have applied and haven't got rejected (yet) based on my experience (no 500h jet , nor TR). I've heard DHL Austria is quite keen on signing ab initio, but that's just hear-say.
We'll see if cadets get invited, I've gotten other applications running on career.aero and if I don't meet the requirements , within a few days they close the application saying I haven't got the experience