Sources say that Nest’s vice president of technology Yoky Matsuoka, as well as Greg Duffy who co-founded Dropcam, are no longer with the company.
Matsuoka was previously the head of innovation at Google, as well as a professor of computer science and engineering at the University of Washington. She’s leaving to join Twitter. Duffy joined Nest when Dropcam was acquired for $555 million last June.
Nest did not immediately respond to a request for comment.
Matsuoka’s rise has been particularly remarkable. She came to the US from Tokyo pursuing a professional tennis career before injuries sidelined her. A love for robotics led to her working on a project to create a better robotic hand, as well as a “tennis buddy” that would volley shots back in a way that was proportionate to a player’s skill level.
She joined on as founding member of Google X in 2011, eventually joining Nest to lead its technology team, which creates the inner workings of the company’s thermostat and smoke detector.
It’s unclear what Matsuoka’s role at Twitter will be. She hasn’t tweeted yet, and is only following two people: Twitter’s CEO Dick Costolo, and its VP of engineering Alex Roetter.
As for Duffy, who did not immediately respond to a request for comment, he co-founded Dropcam after selling his email search company Xobni to Yahoo.
Dropcam went from using off-the-shelf cameras to custom-made hardware and lens optics to capture video for its cloud recording service, eventually moving moving to a swanky office in San Francisco’s South of Market neighborhood.