Lead Product Security Engineer (AI & Web)

Meta; Bellevue (WA); On-site; USD 180,000 - 260,000; Full time

Job summary

Meta seeks a Security Engineer to provide technical leadership across web and AI security, partnering with product teams and security organizations to define strategy, build tooling, and ship secure-by-design features for agentic products and apps. You will author and review code in multiple languages, drive multi-year roadmaps, and develop scalable security products.

The role demands strong experience in enterprise security, threat modeling, and AI ethics, with focus on scalable security

Qualifications

• B.S. or M.S. in Computer Science, Engineering, or related technical discipline, or equivalent experience.
• 10+ years building and securing enterprise-scale infrastructure software and services.
• 8+ years authoring code in Python, PHP, Java, Ruby, Go, Rust, C/C++ (or similar).
• Experience fixing infrastructure security problems across broad corporate boundaries using influence and relationships.
• Experience in designing, analyzing, improving efficiency, scalability, and stability of distributed systems and threat modeling of infrastructure software and services.
• Experience owning a component, feature, or system; broad knowledge of security domain incl. investigations, incident mgmt, forensics, offensive security, vulnerability mgmt, product security.
• Experience adhering to responsible, ethical AI practices (risk assessment, bias mitigation, quality and accuracy reviews).
• Demonstrated ability to integrate AI tools to optimize workflows and drive impact.
• Ongoing AI skill development (prompt/context engineering, agent orchestration) and staying current with emerging AI technologies.
• Contributions to security or privacy community (public research, blogging, presentations).

Responsibilities

• Author code and conduct code reviews in Python, PHP, Java, Ruby, Go, Rust, C/C++ (or similar).
• Influence and align the organization’s vision with multi-year roadmaps and deliver on programs and projects.
• Conceive, design, and develop scalable security products, systems, and frameworks; improve existing security systems' efficiency, scalability, and stability.
• Identify and prioritize improvements to security maturity across Meta and design solutions at scale.
• Collaborate with cross-functional teams to prioritize security maturity work.
• Shift detection and prevention left into the development workflow; provide architecture and threat-based guidance.
• Establish ownership of a security system with end-to-end understanding.

Skills

Python

Java

Go

C/C++

Ruby

Rust

security mindset

AI security

threat modeling

Education

B.S./M.S. in Computer Science or related field

Tools

Security tooling

Infrastructure security

Threat modeling tools

Job description

Meta seeks a Security Engineer to provide technical leadership across web and AI security, partnering with product teams and security organizations to define strategy, build tooling, and ship secure-by-design features for agentic products and apps. You will author and review code in multiple languages, drive multi-year roadmaps, and develop scalable security products.

The role demands strong experience in enterprise security, threat modeling, and AI ethics, with focus on scalable security