Jeff Dean detailed the final 48 hours of his 27-year tenure at Google, marked by an emotional video call with 139 close colleagues, a farewell party attended by 1,500 people, and a late-night rush to respond to 400 internal messages before his access was revoked. The former chief scientist closed his laptop on Thursday afternoon, spent a minute technically unemployed at midnight, and immediately became cofounder of Discovery Loop, an AI startup aimed at automating scientific experiments. His departure, alongside collaborators Sanjay Ghemawat, Oriol Vinyals, and Quoc Le, is seen as a significant blow to Google's AI recruiting efforts. A viral post from a former intern also highlighted Dean's unusual accessibility, recounting how the executive once accepted a random calendar invite from an intern in 2022. Speaking at the KDD Conference in Jeju, South Korea, Dean walked attendees through an hour-by-hour breakdown of his departure, a timeline he later shared on X. Before 8:30 a.m., only about a dozen people at Google knew Dean was leaving. At 9 a.m., the news went public internally. By 2:30 p.m., about 1,500 colleagues packed into a cafe space designed to hold just 300 people. At 7 p.m., he attended a yoga session. At 8:30 p.m., he played in a soccer league game. At 10:30 p.m., Dean found 400 "incred