Security Engineer, Application & AI
Brain Co., San Francisco Bay Area +3
The role
As our Security Engineer, Application & AI, you will own the security of our products and application layer — secure development practices, agent security, third-party integration security, and data protection for AI products operating in some of the world's most regulated and sensitive environments.
This is a hands-on builder role. You will write code, ship security tooling, and work directly with product and ML engineers to build security in from the start rather than bolt it on after. You are expected to work AI-natively: using AI to write threat models, automate security review, scale code analysis, and build internal tooling. This is not a nice-to-have — it is how the role is designed to operate and how one person can have outsized impact across a fast-moving engineering organization.