Senior Application Security Engineer (Remote)

ABOUT THE ROLE We are seeking a highly skilled Senior Application Security Engineer to join our team at Brex. As a pioneer in AI-driven financial services, we are committed to building a world-class financial platform that enables companies to spend smarter and move faster in more than 200 markets. Our platform combines global corporate cards and banking with intuitive spend management, bill pay, and travel software, empowering founders and finance teams to accelerate operations, gain real-time visibility, and control spend effortlessly. WHAT YOU'LL DO As a Senior Application Security Engineer, you will play a critical role in finding and responding to security vulnerabilities across the Brex platform. Your responsibilities will include: - Identifying vulnerabilities, demonstrating business impact, and articulating the risk of specific vulnerabilities to drive prioritization efforts - Performing penetration testing and design reviews, looking for vulnerabilities and insecure designs, and working with engineering and product to design secure product features - Maintaining and building internal tools to automate security efforts, perform SAST and DAST testing of the Brex platform, and support secure development practices - Building and contributing to a culture of collaborative security excellence through technical leadership, learning sessions, and mentorship within the team and wider organization WHAT YOU'LL NEED To be successful in this role, you will need: - 5+ years of work experience in an Application Security or related role - The 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 - A collaborative mindset paired with strong written and verbal communication skills WHY REMOTE As a remote employee at Brex, you will have the flexibility to work from anywhere and enjoy a better work-life balance. You will also have the opportunity to collaborate with a talented team of engineers and security experts who are passionate about building a world-class financial platform. BENEFITS - Competitive salary range of $192,000 - $240,000, depending on location, skills, experience, market demands, and internal pay parity - Equity and other forms of compensation as part of a total compensation package - Comprehensive health plan - Parental leave - Education stipend - Life insurance - Equipment stipend - Flexible schedule - Opportunities for professional growth and development in a dynamic and innovative company.