Security Engineer: Lead Threat Modeling & Scalable Defenses

Meta’s Security Engineering team is seeking a Security Engineer to help protect billions of users and Meta’s global infrastructure from evolving threats. You will conduct security assessments, vulnerability research, and threat modeling across Meta’s products and systems—spanning mobile apps, web platforms, backend services, and internal infrastructure.

You will identify systemic gaps, drive mitigations at scale, and partner with engineering teams to embed security best practices into the

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