Application Security Engineer
Reuben Cooley, Inc.
Senior Application Security Engineer
Location: Princeton, NJ & NYC, NY (Hybrid)
• 8-15+ years in software engineering and application security, with substantial hands-on development experience (not security-adjacent — you've shipped code). • Strong Python for automation and tooling. • Proficiency with Claude Code — you use it daily and know your way around its extensibility (skills, subagents, hooks, slash commands, and MCP integrations) to build reusable security workflows and automation, with a clear-eyed view of its strengths and failure modes. • Working understanding of AI agents and agentic frameworks, and the emerging security concerns around them (OWASP LLM Top 10, agent tool permissions, prompt injection, supply-chain risk in model/tooling). • Depth in secure SDLC, threat modeling, and common vulnerability classes (OWASP Top 10, API security, authn/authz). • The judgment to know when to automate, when to escalate, and when to just fix it yourself. Nice to have • Experience securing production LLM/agentic systems or building internal AI security tooling. • Contributions to open-source security tools. • Relevant certifications (OSCP, GWAPT, CSSLP) — helpful, not required.
Vacancy posted 1 day ago
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