Senior Application Security Engineer (Remote)
Core
Finding and responding to security vulnerabilities across the Brex platform, including AI-driven features, and building tooling to automate security efforts.
Role type
Senior Application Security Engineer
Builds
Internal tools for SAST/DAST testing, secure developer workflows, and AI security capabilities
Domain
Fintech / Application Security / AI Security
Deliverable
production ML models | product features | infrastructure
Required skills
Penetration testing, threat modeling, incident response, Python, scripting languages, AI/agentic workflows, secure development practices
Preferred skills
Kotlin, gRPC, GraphQL, Kubernetes, software engineering background, AWS cloud environments, bug bounty programs, open source contributions
Technologies
Python, Kotlin, gRPC, GraphQL, Kubernetes, AWS
Responsibilities
Identify vulnerabilities and demonstrate business impact through custom attack chains; Perform penetration testing and design reviews; Maintain and build internal tools to automate security efforts; Partner with product and engineering teams to design secure product features, including AI capabilities
Seniority
Senior, hands-on IC with technical leadership
