Looks like plenty more birds are flying Twitter’s coop.
Sara Haider, a mobile engineer and technical lead at Twitter for the past four and a half years, announced on Friday that she plans to leave the microblogging company to join Secret, the buzzy anonymous social startup that launched just two months ago.
Haider will assume the role of Android lead for Secret, where she’ll be responsible for launching an Android version of the app as soon as possible. (Currently, Secret is only available on iOS devices.) At Twitter, Haider worked to launch the Android version of the company’s Vine video app, and for years also worked on the Android app for Twitter proper.
Along with Haider, Twitter confirmed to Re/code that Vice President of Analytics and Business Intelligence Cayley Torgeson also plans to leave the company.
Torgeson isn’t a public-facing executive, having done zero press interviews. But multiple people familiar with Torgeson said that his departure is indeed a big deal. He’s the person in charge of all of Twitter’s internal analytics, having built all of the tools the company uses to measure product performance.
In a nutshell, he’s the guy who can tell top brass if Twitter is “working” or not. Sources said he was a well-respected figure inside the company.
The losses of Haider and Torgeson are the latest in a string of Twitter departures in the past few months, most of which were employees who joined during the 2009-2010 years, when the company was comprised of little more than a couple hundred employees.
In just a handful of months, early employees Ryan King, Alex McCauley, Patrick Ewing, Ed Gutman and Kristen Cordle have all announced their departures. And, most notably, former Vice President of Product Michael Sippey left the company earlier this year.
The employee losses come just months after Twitter’s initial public offering on the New York Stock Exchange, and questions have arisen as to whether the company will be able to retain talented employees in its post-IPO era. As Twitter has swollen to nearly 3,000 employees, with offices across several continents, many have left the company to search for new opportunities at smaller companies, or to launch their own startups.
Sources said there are likely more departures to come.
To be sure, some employee churn is to be expected from early hires whose shares have vested and who joined the company when it looked like something entirely different from what it is today. Twitter, too, has picked up a few new hires recently, including a new HR lead, as well as a former YouTube leader to work on Twitter video projects.
Still, in today’s competitive market for tech talent, Twitter must work hard to prove it can still be an attractive, innovative place for bright young engineers looking to enter the industry, as well as for seasoned executives looking to move over from other well-established Internet companies.
It’s unclear who will fill Haider’s and Torgeson’s roles upon their departures.
This article originally appeared on Recode.net.