Senior Application Security Engineer

Join Brex as a Senior Application Security Engineer to focus on finding and responding to security vulnerabilities across the Brex platform. Perform code reviews, design reviews, penetration testing, and vulnerability management, and develop tooling to support secure developer workflows.

Requirements

• 5+ years work experience in an Application Security or related role
• Ability to find vulnerabilities in complex systems, demonstrating business impact through custom attack chains
• Experience with a wide range of secure development activities including— threat modeling, developer education, and incident response
• Knowledge of Python, scripting languages, and AI/agentic workflows to automate tasks, build tools and improve productivity
• Collaborative mindset paired with strong written and verbal communication skills

Benefits

• Generous Paid Time Off
• 401k Matching
• Retirement Plan
• Relocation Assistance
• Flexible work environment (hybrid, with up to four weeks per year of fully remote work)