Hi XR,
I have heard from 2 relatively old finance IT guys (one with experience in GS, Barcap, baml…, another in Barcap, Nomura….) that risk system is a good field for IT guys.
In good times, business invests in risk systems; In bad times, business still needs risk systems.
Each IT system is sponsored by some big-shot business users. The more power your sponsor is, the more secure your job is. Sometimes risk managers have real power — they can sometimes stop “risky” trades.
Another field is e-trading. By “e-trading”, they mean mostly automated ECN-trading. I think exchange-trading too.