Leonid (Lenny) Rosenfeld is the head of engineering for market data, alternative data, and machine intelligence platforms at Nasdaq. He boasts 20+ years of turning ideas into reality, leading technology teams through early- to midstage growth. His experience includes data-intensive computing, machine learning, applied analytics, and distributed systems. Outside of work, he coaches his kid’s Lego robotics team, obsesses over sports, and is an armchair philosopher.