Senior Security Engineer I, Application Security
Core
Senior Application Security Engineer designing AI-driven security automation and leading secure architecture for complex payment systems and AI-integrated applications.
Role type
Senior IC application security engineer (AI/LLM focus)
Builds
Automated security review workflows, secure design reviews, and threat models for payment systems and AI applications.
Domain
Fintech / Payments / AI Security
Deliverable
production ML models | product features
Required skills
Application security, web application penetration testing, source code auditing, security tool tuning (SAST/DAST/SCA), applied cryptography, OAuth2/SAML/SSO, Python, Ruby on Rails, Java, JavaScript, Node.js, AWS, Docker, GitLab CI, prompt engineering, OWASP Top 10 for LLMs
Preferred skills
AI pipeline integration, custom tool development for LLMs, vulnerability research, mentoring
Technologies
Python, Ruby on Rails, Java, JavaScript, Node.js, AWS, Docker, GitLab CI, Claude, LLM APIs
Responsibilities
Design and deploy automated security review workflows using LLMs; lead secure design reviews and threat modeling; perform source code audits and live application testing; tune security tools to reduce noise; mentor engineers on security best practices.
Seniority
Senior, hands-on IC
