Hedge funds are locked in a fierce talent war, shelling out pay packages worth tens of millions to secure top talent — and that means executives are going all-in to woo prospective hires, even at the entry-level. Umesh Subramanian, Citadel's chief technology officer, leads the tech teams that power the firm's investment, research, and risk-management platforms. He told Business Insider that he personally calls some of the most in-demand candidates during the decision-making process to see where