Senior Application Security Engineer

Responsibilities

• Conduct application security reviews — threat modeling, code review, and risk assessment — for new features and major product changes across Monarch's Django/Python stack.
• Perform and improve SAST/DAST operations including triage, validation, and remediation tracking of findings in CI/CD pipelines.
• Work through the vulnerability backlog with urgency — maintaining triage criteria, remediation tracking, and escalation paths in partnership with engineering squads.
• Perform and coordinate penetration testing and security assessments against Monarch's web and API surfaces.
• Apply and improve AI security review processes for LLM-integrated features and agentic attack surfaces — covering prompt injection, data leakage, model abuse, and supply chain risk.
• Build and maintain security automations and AI-powered tooling, and define and assess security requirements for AI workflows and agentic systems.
• Participate in the weekly security on-call rotation.

Requirements

• 5+ years in security engineering with demonstrated depth in Application and AI security — threat modeling, SAST/DAST, secure code review, and vulnerability management.
• Proficiency in Python and strong understanding of web application security (OWASP Top 10, API security, auth/authz patterns).
• Hands-on experience with application security tooling — Semgrep, Burp Suite, Nuclei, or equivalents.
• Familiarity with AI/ML security risks — prompt injection, model abuse, agentic attack surfaces, or LLM supply chain risk.
• Transformative AI fluency — actively uses AI tools to accelerate security work and build automation.

Nice-to-Haves

• Experience in fintech or with financial data security requirements.
• Familiarity with SOC 2, NIST CSF, or similar compliance frameworks.
• Cloud security experience (AWS preferred) — IAM, container security, ECS/EKS.
• Relevant certifications: OSCP, BSCP, CSSLP, CISSP, or equivalent.
• Detection engineering and incident response experience.
• Additional offensive security experience — red teaming, bug bounty, or broader penetration testing beyond web/API surfaces.

Compensation

• Competitive cash and equity compensation.
• Salary range: $180,000 - $215,000.