Meta's careers run at metacareers.com on its own proprietary in-house system. You apply by creating a native Meta Careers Career Profile, which holds a single resume per applicant. There is no Workday, Taleo, iCIMS, Greenhouse, Lever, SmartRecruiters, or Ashby exposed anywhere in the path. A personal Facebook account is not required to apply, though some candidates report a Facebook-login prompt later, at the interview-scheduling step.
One exception sits outside the full-time funnel: contingent and contractor roles are posted on a separate site at us.meta.talentnet.community, which runs on the third-party TalentNet platform. That is the only vendor in the picture, and it applies only to the contractor track, not to full-time applications.
What that changes for full-time roles: there is no third-party keyword filter to reverse-engineer. The mechanical baseline still matters because Meta's own tooling and a recruiter read the file: single column, a real text layer, standard section headers like Experience, Education, and Skills, and no skill-bar graphics or image-quoted text. But clean formatting only gets you read.
The sufficient condition is content that matches the posting: the role's standardized title and named skills mirrored exactly, with a quantified, owned outcome on every line. Clean formatting gets you parsed; demonstrated, scaled impact gets you advanced.