Senior AppSec Engineer — End-to-End Security & AI Tooling

Relay is seeking an Senior Application Security Engineer II to own a defined slice of our platform end-to-end, testing services, identifying exploitable gaps, and fixing issues alongside our senior engineers who maintain the auth system and build DAST tooling. You will threat model designs, run white-box tests, triage bug reports, and coordinate fixes with owners, writing patches when appropriate.

You’ll use Datadog security, Burp Suite, and in-house tools, while leveraging AI tooling like