Rabii previously worked at Google, where he helped lead the team in charge of building chips for the company's devices, including the Pixel smartphone's custom Visual Core chip, according to his LinkedIn profile. Bloomberg reports that Rabii will work under Andrew Bosworth, the company's head of virtual reality and augmented reality.
Facebook and Google declined to comment.
Facebook started forming a team to design chips for data centers and artificial intelligence work earlier this year. Facebook is said to be working on several future devices. Earlier this year, the company launched the Oculus Go standalone virtual reality headset with a Qualcomm smartphone chip. Facebook is also working on its first branded hardware: a series of smart speakers with large touch screens that can also be used for video chats.
Later this year, Google plans to release new Pixel phones with upgraded cameras and an edge-to-edge screen on the new larger model.
Apple has been shipping its own custom main processors in iPads and iPhones since 2010, and has created an array of custom chips for controlling Bluetooth, taking pictures, and conducing machine learning tasks. By 2020, the iPhone maker hopes to start shipping Macs with its own main processors.