(L-r) Matt Turck, Spencer Lazar, Sriram Krishnan and Mar Hershenson speak onstage during TechCrunch Disrupt NY 2017, at Pier 36, May 15, in New York City. (Noam Galai/Getty Images for TechCrunch)

Sriram Krishnan, a former top executive from Facebook and Snap, has been hired by Twitter as its senior director of product.

Krishnan will be joining Twitter from Oct. 2 where he will be responsible for a lot of the core features inside the main app, internally referred to as “Bluebird,” including timeline, direct messaging and search, technology news website Recode reported.

“I’m going to be joining Twitter and become a part of #theflock to work with the fantastic product team there,” Krishnan tweeted.

A well-known product executive around Silicon Valley, Krishnan has primarily focused on ad technology. Now he is taking on a consumer product role, the report said.

“So… excited to have you Sriram! Welcome home,” tweeted Twitter CEO Jack Dorsey late night, Sept. 18.

Krishnan left Facebook in February 2016 to help lead advertising efforts at Snapchat’s parent company Snap. He quit Snap in February.

At Facebook, he led “Facebook Audience Network” to take on Google.