About The Role

At Opendoor we are building the modern system of homeownership, enabling people to buy and sell on their own terms. Our Security Engineering team is focused on building intelligent systems that protect Opendoor and our customers while enabling unprecedented engineering velocity. As an Application Security Engineer, you will own the security of everything we ship—from consumer flows that put cash offers in homeowners’ hands, to GraphQL APIs that power our products, to AI agents and tools our engineers build every week.

What You’ll Do

• Find and fix application vulnerabilities across our consumer products, internal admin tools, and the GraphQL APIs powering home acquisition, resale, mortgage, title, and escrow.
• Own and evolve our AppSec tooling stack—SAST, DAST, SCA, and secrets scanning—and integrate findings into developer workflows where engineers already live (pull requests, Linear, Slack).
• Run our HackerOne pro...