Nikita Bier steps down as X's Head of Product after a year, thanking Elon Musk and the team; Musk responds warmly to his farewell note on X.

Nikita Bier has stepped down as Head of Product at X, Elon Musk's social media platform, after a little over a year in the role. Announcing the decision on X, Bier wrote that he thinks it's "time to pass the torch and demote myself to my natural state: a poster," adding that he'll continue to advise the company.

From serial entrepreneur to X's product chief

Bier, a serial entrepreneur and Lightspeed venture partner, took over the product lead role in July 2025. Before joining X, he had built the teen-focused apps tbh and Gas, which were later acquired by Facebook and Discord respectively, with both apps reaching the No. 1 spot on the US App Store.

In his farewell note, Bier said the platform had witnessed unprecedented growth in new users and engagement during his tenure, adding that X had climbed 70 spots in the App Store over the past year. He said that in the last 400 days, the team had rebuilt almost every aspect of X, including the Timeline, the Android app, onboarding, notifications and chat, while also launching nearly 30 new products.