AI Security Engineer

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, empowering developers with tools and guidance to enable innovation while maintaining AI security by default.

Tech stack includes Python, Next.js, TypeScript, Docker, AWS, Kubernetes, and PostgreSQL.

Responsibilities

Define, build, and refine mechanisms to secure AI systems against adversarial behavior.

Understand technically complex AI systems, identify potential weaknesses, and implement improvements.

Spend at least 50% of time performing hands‑on remediation and collaborate with peer engineers to drive remediations.

Plan and carry out threat modeling activities and realistic threat simulations across our offerings.

Conduct cybersecurity evaluations and lead AI security assessments in a cross‑functional environment.

Develop initiatives to improve our capabilities for evaluating AI systems and enhance the organization’s prevention, detection, response, and threat‑hunting capabilities.

Provide guidance and education to developers to help deter and prevent threats.

Qualifications

Hands‑on coding and prompting experience.

Bachelor’s or Master’s degree in Computer Science or a related field, or equivalent experience.

Technical and process subject‑matter expert in AI security services and attacker tactics, techniques, and procedures.

Strong understanding of LLMs, AI architecture patterns, machine learning models, and related technologies such as MCP.

Understanding of application security principles and secure coding practices.

Experience developing and implementing security procedures and policies.

Strong problem‑solving, project management, leadership, and communication skills.

Self‑motivated with a willingness to take ownership of tasks.

4+ years of industry experience.

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 may be part of the total compensation package.

Benefits include comprehensive health, dental, and vision insurance for you and your dependents, plus a 401(k) plan.

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