Dom Hofmann, the co-founder of video-sharing service Vine, has stepped down as the general manager of the company. Hofmann has been the head of Vine since early 2012. Hofmann will no longer work on Vine on a day-to-day basis. He will be working at another startup going forward. Vine co-founder and former CTO Colin Kroll will take over Hofmann’s day-to-day duties. Vine currently has 14 employees. Twitter acquired Vine in October 2012.