Security Software Engineer (L6), Security Protocols & Foundations

Design and build security primitives that are necessary for existing and innovative new streaming protocols for large scale content delivery. Develop and own a consolidated set of application security primitives used across our delivery paths, built once rather than separately per application, extending and going beyond what libraries like OpenSSL provide. Develop primitives and mitigations for host-side DoS resilience, including kernel integration to throttle abusive traffic, partnering with adjacent teams for end-to-end protection of our infrastructure. Proven track record of architecting and implementing security features that meaningfully improve system security. Deep, hands-on expertise in applied cryptography and security protocols and techniques (TLS, DTLS, QUIC, signatures, key management, AEAD). Experience with design, development, and deployment of end-to-end security controls, from architecture through production. Success at partnering with others to improve the security posture through cross-functional changes. Experience designing DoS / resource-exhaustion mitigations for high-scale services. Contributions to OpenSSL or similar crypto libraries, or to security protocol standards. Active participation in IETF, Crypto Forum Research Group (CFRG), or Real World Crypto. Experience securing live streaming or media delivery protocols. Experience working on highly distributed systems and fuzzing complex systems. Experience securing FreeBSD and Linux. Experience with C, Golang, Python.