I applied through a recruiter. The process took 4 weeks. I interviewed at Meta
Interview
There was 1 coding interview that was 1-2 questions, which were relatively easy with potential followup if you finish early. If you pass that round, then there's a systems interview that was several conceptual questions about linux and OS.
I applied through an employee referral. The process took 2 months. I interviewed at Meta (Menlo Park, CA) in Jan 2022
Interview
After HR reach out to you, there is one Linux Online Assessment and one Phone Screen and one Virtual Onsite. PS is basically about programming, VO is about Linux knowledge and troubleshooting. After that you will get results from HR
Interview questions [1]
Question 1
Q: Tell me about Swap in Linux Q: Assume you know a FB server is very slow, how you troubleshoot?
I applied through a recruiter. The process took 5 weeks. I interviewed at Meta (London, England) in Oct 2022
Interview
Linux trivia quiz then interview with easy coding challenges and then an interview from OS knowledge, going deeply into what you know about the Linux and stuff, questions about advantages/cons/problems of given system mechanism.
Interview questions [1]
Question 1
I recommend on reading Linux internals like memory, CPU interrupts.