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URL: https://www.phoronix.com/news/Josef-Bacik-Leaves-Meta

⇱ Btrfs Developer Josef Bacik Leaving Meta & Stepping Back From Kernel Development - Phoronix


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Btrfs Developer Josef Bacik Leaving Meta & Stepping Back From Kernel Development

Written by Michael Larabel in Linux Storage on 29 August 2025 at 04:01 PM EDT. 55 Comments
Josef Bacik who is a long-time Btrfs developer and active co-maintainer alongside David Sterba is leaving Meta. Additionally, he's also stepping back from Linux kernel development as his primary job.

Josef Bacik had been employed by Meta working on Btrfs for years. Unfortunately, that time is coming to an end. Bacik announced today:
"Today is my last day at Meta. This has been the best team I’ve ever been on, and I’ve been on some great teams. Next week I start a new chapter, I will be joining Anthropic to help them scale out their infrastructure and put my decades of kernel and systems experience to use. I will be stepping back from kernel development as my primary job for the first time in my career. I’m sad to leave my colleagues, but I’m excited to try something new and see where it takes me."

So he's leaving Meta and Linux kernel development at large for the Anthropic AI start-up.

👁 Bacik leaving Meta

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.