Jack Dorsey

Twitter's consumer product boss Jeff Seibert, who just took over Twitter's core product team back in September, is no longer running Twitter product, according to multiple sources. Seibert, who co-founded Crashlytics, will go back to running Twitter's developer product suite Fabric, which he was doing before the promotion in the fall.

Twitter does not have a permanent replacement for Seibert, and is opening up a search to fill the role, according to sources. Ed Ho, a senior engineering director who has been at Twitter for two years, will take over Twitter's product on an interim basis.