Security Engineer, Application Security

About Quartermaster AI

At Quartermaster AI, we believe the ocean should be a safe and sustainably managed resource for all. By leveraging cutting-edge AI and robotics, we unlock capabilities that were only recently impossible. Our distributed open-ocean systems enable every vessel to sense, compute, and communicate, enhancing maritime domain awareness for those who need it most.

The software we ship runs in contested environments and on systems our partners stake their missions on. We need an application security engineer who can build security into our products from the first design review to the last line of code — making secure the easy, default path for every engineer on the team.

The Role

As our Security Engineer, Application Security, you will own the security of the software we build — our cloud services, APIs, data pipelines, and the applications that run across our distributed, edge-deployed systems. You will be the security partner engineering teams turn to: leading threat models and design reviews, finding and helping fix vulnerabilities in code, and steering the architecture of our products toward secure-by-default.

This is a hands-on senior role with broad autonomy. You’ll go deep on code and architecture, build the tooling and automation that scales application s