Google’s ex-chief scientist Jeff Dean shares last few hours at Google: Tears, lots of emotional chat, explosion of sad emojis and one minute of…
Jeff Dean spent his final night as a Google employee doing what most departing executives hand off to an auto-reply. He sat up until 2:30 in the morning answering 400 goodbye messages one by one, because his corporate account was about to expire and take every one of them with it.Speaking at the KDD Conference in Jeju, South Korea, Google’s former chief scientist put up a slide with an hour-by-hour timeline of his last two days at the company he joined in 1999 as employee number 30. He later posted it on X with an apology attached: anyone who messaged him after Thursday afternoon never got a reply, because by then the laptop was shut for good.The timeline starts early last Wednesday, when roughly 12 people at Google knew Dean was going. At 8:30 AM he told 139 close colleagues on a video call, and his own summary of it is the most-quoted line of the week: tears, explosions of heart and sad face emojis, lots of chats running on the side of the meeting. If 139 close colleagues sounds implausible, consider that Dean managed about 4,400 people across Google Research and AI, a number that surfaced in Discovery Loop’s pitch deck.
Jeff Dean’s Google farewell party was booked for 300 and 1,500 people showed up
Half an hour later, two things went out at once: the public announcement of Discovery Loop and the internal farewell email, the one listing MapReduce and BigTable alongside Monterey bike rides and 18 desk moves. By 2:30 PM there was a party. Google had booked a cafe space that holds about 300. Around 1,500 people came.Then Dean, who keeps a group run called “Run or Else…” going, went to a 7 PM yoga session and played a soccer league game at 8:30. He got home at 10:30 PM to those 400 messages.
Why Jeff Dean stayed up till 2:30 AM answering Google chat messages
The urgency was technical, not sentimental. Internal chats lived on the corporate account, and the corporate account was expiring. Everything in that inbox would be gone the next day, so he answered all 400 and went to sleep at 2:30 AM. Four hours later he woke to 250 more, plus 500 replies to the farewell email that had CC’d his personal Gmail. At least those won’t disappear in eight hours, he noted on the slide.Thursday was a losing race. By 5:20 PM he had cleared nearly every corporate message and they were still arriving. He closed the laptop anyway.
Unemployed for exactly one minute, then Jeff Dean became the co-founder of Discovery Loop
At 11:59:59 PM, the slide reads: Unemployed. One second past midnight on Friday, it reads co-founder of Discovery Loop, alongside Sanjay Ghemawat, Oriol Vinyals and Quoc Le. The startup is a public benefit corporation backed by Alphabet, Radical Ventures and Khosla Ventures, aiming to automate the experimental loop itself and run thousands of AI-designed experiments in parallel across machine learning, chip design and drug discovery. Alphabet is supplying compute for the first year.The exit lands inside a wider AI reshuffle at Google, with Demis Hassabis moving out of the Google DeepMind CEO role into a chairman post and CTO Koray Kavukcuoglu elevated to SVP. Dean followed the KDD slide with a photo of his surrendered badge and sticker-covered Chromebook, captioned “Turned it in…”. That post has crossed 2.8 million views.
