A Brokerage Firm's It Infrastructure?

#1
HI,

I have been thinking about opening a brokerage firm and have done a lot of research but just couldnt find anything about the computer/IT infrastructure of a brokerage firm. I need to know what are the computer/software requirements, in details, for a brokerage firm to run properly. Ie. Individual clearing, trading system, servers, datacenter. I just want a rough idea before I hire an IT technician.

I would really appreciate if you can provide me the answer or any website. Thank you
:)