AI Security Engineer at Perplexity

Perplexity is seeking a highly skilled, experienced, and hands-on AI Security Engineer to join our security team, driving the protection of next-generation AI systems against adversarial threats. In this role, you’ll design and implement robust mechanisms to secure self-hosted models, LLM APIs, agents, MCPs, and the core AI stack. You'll empower developers with tools and guidance, as well as technical contributions, enabling innovation while ensuring AI security is strong by default.Our tech stack includes Python, NextJS, TypeScript, Docker, AWS, Kubernetes, and PostgreSQL.ResponsibilitiesDefine, build, and refine mechanisms to secure AI systems (including self-hosted models, LLM APIs, agents, MCPs, and other core components of the AI stack) against adversarial behavior of all kindsUnderstand technically complex AI systems, identify potential weaknesses in their architecture, and implement improvementsAt least 50% of time performing hands-on remediation. Also working closely with peer engineers to drive remediationsPlan and carry out threat modeling activities and realistic threat simulations across our offeringsConduct cybersecurity evaluations and lead AI security assessments in a cross-functional environmentDevelop initiatives that improve our capabilities to effectively evaluate AI systems and enhance the organization's prevention, detection, response, and threat hunting capabilitiesProvide guidance and education to developers to help deter and prevent threatsQualificationsHands-on coding and prompting experience.Bachelor of Science or Master of Science in Computer Science or a related field, or equivalent experienceBe a technical and process subject matter expert regarding AI security services and attacker tactics, techniques, and proceduresGood understanding of LLMs, AI architecture patterns, machine learning models, and related technologies such as MCPUnderstanding of application security principles and secure coding practicesExperience developing and implementing security procedures and policiesStrong problem-solving, project management, leadership, and communication skillsSelf-motivated with a willingness to take ownership of tasks4+ years of industry experienceThe cash compensation range for this role is $250,000 - $350,000.Final offer amounts are determined by multiple factors, including, experience and expertise, and may vary from the amounts listed above. Equity: In addition to the base salary, equity may be part of the total compensation package.Benefits: Comprehensive health, dental, and vision insurance for you and your dependents. Includes a 401(k) plan.