Eranet News on January 20th,2014.Twitter's VP of product Michael Sippey is leaving the company.Twitter's vice president of product, Michael Sippey, has announced his flight from the company after serving it for two years.

Sippey will be stepping down to an advisory role at the company before leaving.

"Over the past few weeks I've talked with Dick and Ali about what I want next in my career, and what Twitter needs at this stage of its life," Sippey wrote in an email to Twitter's staff — also posted on his personal website. "And I've decided that it’s time for me to move on." Sippey doesn't reveal any specifics on those conversations with Dick Costolo and COO Ali Rowghani; instead, his goodbye letter hints that he'd prefer to work for a smaller, more nimble company where he'd have greater control. "I've spent most of my career working at start-ups, helping them scale and having a direct hand on the product," he said.

Sippey has played an active role at Twitter's consumer product and design initiatives and was also involved in the acquisitions like Tweetdeck and Vine that lets users capture and share short looping videos. However, according to reports, Sippey's exit might have been the result of some discord with COO Ali Rowghani, who became his boss last year.

In a response to Sippey's tweet that announced his departure, Rowghani tweeted, "No one has shown more passion for Twitter than you. Thank you for your amazing contributions and your continued friendship & counsel."

This source from Internet.