Security Engineer, Application & AI

Brain Co. is seeking a Security Engineer, Application & AI to own the security of products and application layer, including secure development practices, agent security, third-party integration security, and data protection for AI products in regulated environments. This hands-on role involves writing code, shipping security tooling, and working with product and ML engineers to build security from the start. The role is designed to work AI-natively, using AI to automate security tasks.

5+ years of experience in application security or product security with hands-on production systems. Builder mindset, deep fluency in application security fundamentals (OWASP, AuthN/AuthZ, secure SDLC, secrets management, cryptography). Understanding of agentic AI security surface. Experience protecting sensitive data (PHI, PII). Work AI-natively. Think in attack surfaces. Comfortable with regulated industries. High-agency environment.