Twitter product head resigns, sends thanks note to Musk & team; Tesla CEO responds

Nikita Bier, the product head at X (formerly known as Twitter) has stepped down from his position after serving in the role for just over a year. Bier announced his decision in a post shared on X, saying it was ‘time to pass the torch and demote myself to my natural state: a poster.’ He added that he will continue to advise the company. Bier, a serial entrepreneur and Lightspeed venture partner, took over the product lead role in July 2025. In his farewell note, he highlighted overseeing the launch of nearly 30 new products and rebuilding core aspects of X, including the timeline, Android app, onboarding, notifications, and chat. He also pointed to record-breaking growth in users and engagement, noting X had climbed 70 spots in the App Store over the past year.His tenure also coincided with controversies, including issues with Grok, the chatbot developed by Musk’s xAI, which was misused to generate harmful content. Despite these challenges, Bier emphasized that X remains “the most important communication technology in history,” but said running the app was a 24/7 job and he needed a breather.Nikita Bier thanked Elon Musk and teamBier expressed gratitude to Elon Musk and the X team, writing: “Serving the X community has been the privilege of a lifetime… None of this would have been possible without the incredible team here.” He named colleagues who will continue leading design, product engineering, and mobile engineering. Musk responded to Bier’s post, thanking him for his contributions.Tesla CEO Elon Musk responds to Nikita Bier’s postResponding to the goodbye note shared by Bier on X, Tesla CEO Elon Musk thanked him for his contribution. “Thanks for helping make this platform much better! You will be missed,” wrote Musk.Read Nikita Bier’s complete post here Ladies and gentlemen, it's time to pass the torch and demote myself to my natural state: a poster. I'll be stepping back from leading product for 𝕏 and will continue on as an advisor.Serving the X community has been the privilege of a lifetime. X is, and will remain, the most important communication technology in history. But running this app is a 24/7 job and it's now time for me to take a breather.The app is seeing unprecedented growth in new users & engagement. We continue to break records every month. We've climbed 70 spots in the App Store since this time last year.And in the last 400 days, we rebuilt almost every aspect of X: the Timeline, the Android app, onboarding, notifications, chat and more.We also launched nearly 30 new products while protecting the integrity of the town square: becoming the first app to show Country-of-Origin on profiles and mounting defenses against AI bots. There's certainly much more work to be done, but our foundation is stronger than ever.None of this would have been possible without the incredible team here. The next leaders will take X to even greater heights with @benjitaylor on design, @singhai on core product engineering and @dinkin_flickaa on mobile engineering -- among many other great people.Thank you to Elon and the X team for welcoming me into the company. See you on the Timeline.Get the latest technology news and updates. Download the TOI App.