Luca Belli is an AI researcher specializing in recommender systems and responsible machine learning. He is the AI Safety Lead at Spring Health and founded Sator Labs, a Responsible AI consultancy. Previously, he led research on recommender systems at Twitter's META team, focusing on algorithmic amplification, and he was an AI Visiting Fellow at NIST. He has provided advice to the European Commission's decision making on regulating recommender systems. He holds a PhD in Mathematics from Tor Vergata University in Rome.