A friend got a Meta recruiter ping last month and immediately texted me "what do I even do now. " I'd been through the loop, so I wrote her a long reply. This is basically that reply, cleaned up.
Source: [Dev.to](https://dev.to/maheshbandaru_ba8cc2/what-the-meta-software-engineer-interview-is-actually-like-and-how-id-prep-5bg4)