Meta's Client Security team is seeking experienced Security Engineer who have a track record of solving complex security problems at scale. Client Security Engineers design and develop solutions to ensure Meta's data and systems can only be accessed by trusted devices, and that applicable security policies are enforced on devices.5+ years of combined experience designing and deploying security infrastructure (such as PKI, key management, and certificate management) 2+ years of software development experience in PHP, Golang, Python, C\C++, Rust, or Ruby Experience applying fundamental security concepts to systems B.S. in Computer Science or a related field, or equivalent experience Mobile Security Experience on iOS and Android platforms including MDM, security policy OS development experience (Windows, Mac, Linux) Experience managing PKI for client devices