I think you'd find that as far as Malaysia and Singapore are concerned, you'll need a work permit, very similar to the ones required by non EU residents who wish to work in the UK. I would think it would be easier to find such work in Dubai though, as the place is literally booming at the moment. Plus, the UAE is one of those countries which has a high percentage of foreigners in their workforce (I wouldnt be suprised if it was as high as 90 percent, if not higher), and as such, employers are less likely to baulk at the idea of work permits/sponsoring you. But you never really know until to give it a go really.