Senior Application Security Engineer

Apollo·United States·Posted 16 October 2026

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About the role

ROLE OVERVIEW The Senior Application Security Engineer is a senior individual contributor responsible for strengthening Apollo’s secure software development lifecycle and reducing application risk across product, platform, and AI-powered features. This role blends deep code-level application security work with strong cross-functional partnership. It includes application security reviews, threat modeling, AppSec tooling, findings triage and remediation follow-through, external testing intake, and developer enablement. This role is calibrated at the L6 senior-IC level: owning semi-annual or annual goals, solving ambiguous problems with sound judgment, improving operational processes, and driving meaningful cross-team collaboration and influence. KEY RESPONSIBILITIES Secure SDLC, design review, and threat modeling - Own and continuously improve the secure software development lifecycle for Apollo applications so security is embedded into design, implementation, and deployment. - Perform application security reviews, threat modeling, and deep code-level analysis for high-impact product, platform, and AI features before launch. - Provide practical security architecture…

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