At large banks, it’s a familiar lament: Our systems have become unwieldly—a spaghetti of legacy platforms mixed with new tools. New reporting rules and a desire to streamline processes in the wake of the financial crisis to better manage risk have led firms to reexamine their systems and overall IT strategies.

The management of legacy infrastructure has almost become a rite of passage for most technologists at large firms. How can the existing infrastructure be remade to handle the influx of da