I moved to singapore a few months ago with my family. I`m not in Finance, am in IT.
A few pointers.
1 - Do NOT move here unless you have a job sorted. Apart from being very expensive, you can`t do things like rent an Apartment, etc without an Employment Pass, which is kind of like a Green Card that your employer organises for you. Have a look at jobstreet.com.sg, or Hudson.com.au for jobs. The visa you get on arrival is a 90 day vistor pass, and you cannot work on it. No special requirements for Irish, just fill in the arrival card on the plane and give it to the immigration officer at the airport.
2 - That said, finance industry here is booming, so you shouldnt have much of a problem. Salarywise, it will depend on your experience, but keep in mind that "Expat packages", ie apartment, schools, flights home paid for etc, are becoming a thing of the past, so you will need to reflect this in your salary demands. If you have a family, you need to be looking at 150-200k Singapore dollars, lower obviously if you are on your own.
3 - Apparantly there are a lot of Irish over here, but I have only met a few. Lots of nationalities over here from around the globe.
4 - Have a look at singaporeexpats.com. Great forum for newbies with a heap of information on ebrything
5 - PM me if you want more info, and the best of luck.
6 - You`ll love it here! Something here for everyone.