Senior AppSec Engineer: Pen-Testing & AI Security

Brex is seeking a Senior Application Security Engineer to identify and remediate vulnerabilities across the Brex platform. You will perform code reviews, penetration testing, and tooling development to support secure developer workflows.

You will collaborate across Security Operations, GRC, Product Security, Front End Platform, and IT Infrastructure, applying threat modeling, SAST/DAST, and agentic AI security to protect a global financial service used by top customers.