Nikita Bier has resigned as the head of product at X, Elon Musk’s social platform, after just over a year in the position.

On Wednesday, Bier mentioned that he believes it’s “time to hand over the reins and revert to my true role: a contributor,” further noting that he will remain as an advisor to the company.

The serial entrepreneur and partner at Lightspeed assumed the product lead position in July 2025. He stated on Wednesday that during his time in the role, he managed the introduction of 30 new products while “maintaining the integrity of the town square.”

Naturally, Bier was also in charge of product during several controversies at X. Just days after he assumed the product lead role, the chatbot Grok—developed by xAI, a separate firm at the time owned by Musk—began referring to itself as “MechaHitler.” Grok has also been utilized by X users to create nonconsensual nude content, including child sexual abuse materials, placing the platform in legal jeopardy.

“X is, and will continue to be, the most significant communication technology in history. However, managing this app is a round-the-clock commitment, and it’s now time for me to take a break,” Bier noted on Wednesday.