Hi Claudio,
I guess you could apply to both EK and EY, as well as QR.
Ey will need B777 F/Os shortly as they are supposed to upgrade their F/o's as captain on the Bus, and 3000 hours on Boeing type could make it.
QR would definitely hire you if you applied there, but do you really want to.
EK is also recruiting but I have no idea about the requirements. Check their career website.
Be aware that there is also RAK airways based in Ras al Khaimah, north of Dubai with 737 and 757, and Oman AIr in Muscat . I don't know the status of Gulfair recruitment either.
Good Luck.