Senior Product Security Engineer
Senior Product Security Engineer
lmarena
LMArena is looking for a Senior Product Security Engineer to lead the security strategy and implementation for their platform, ensuring the integrity and trust of their community. The role involves designing security features, collaborating with engineering teams, and mentoring others on secure practices, all while directly impacting user experience and safety in AI interactions.
Qualification
- 8+ years of experience in software engineering or security engineering, including staff-level scope in securing large-scale, user-facing platforms.
- Proven track record designing and implementing systems to detect, mitigate, and prevent adversarial behavior (bots, Sybil attacks, automated abuse).
- Strong experience with threat modeling, secure architecture design, and risk assessment.
- Hands-on experience building security features into production systems at scale.
- Experience collaborating with cross-functional teams to embed security into product development.
Responsibility
- Own the product security vision for LMArena, ensuring security and trust are core to every stage of our product lifecycle.
- Design and implement platform-wide security features, including Sybil resistance, bot detection, reputation systems, and anti-abuse primitives.
- Lead threat modeling and security architecture reviews for new and existing product features.
- Collaborate with infrastructure and product engineering to design secure APIs, data flows, and identity systems that scale.
- Improve developer velocity by creating secure-by-default frameworks and tooling for internal teams.
- Partner with incident response to quickly assess, contain, and remediate security events, and lead deep postmortems to improve defenses.
- Stay ahead of the curve by monitoring emerging attack techniques and applying cutting-edge security research to our platform.
- Mentor engineers across the company on secure coding practices, architecture trade-offs, and operational security.
