Job Description

Founding Senior Security Engineer, AI Agents
📍 San Francisco Bay Area (on-site) | 💰 Base salary: $200,000 to $330,000 + equity and full benefits

About the Opportunity

Our client is an early-stage, venture-backed AI company building autonomous agents for enterprise customers. Their agents work with sensitive customer data and take real actions inside business-critical software, so security is central to how the product earns trust and wins larger accounts.

This is a senior, hands-on individual contributor role reporting to executive engineering leadership. You’ll shape the security architecture and write much of the code that enforces it.

What You’ll Do

• Build and maintain the threat model and security roadmap for the agent platform
• Design and implement controls that limit what agents can do, including permissions, approvals, and sandboxed execution
• Develop secure identity, credential, and data handling across services and tenants
• Harden application packaging, updates, and release processes
• Write security-focused tests, investigate vulnerabilities, and support incident response
• Partner with product engineers and help customers through security reviews

What You Bring

• Strong software engineering background with production code you personally designed and shipped
• Solid CS fundamentals: algorithms, concurrency, operating systems, and systems design
• Hands-on security engineering: authorization, secrets management, isolation, or network security
• Comfort debugging across backend services and operating system layers
• Awareness of AI-specific risks like prompt injection and untrusted model output
• Ability to prioritize in an ambiguous, fast-moving environment

Nice to Have

• Python, TypeScript, or Rust
• Desktop application or endpoint security experience
• Experience with AI agents or developer tooling
• Enterprise identity, on-prem, or restricted-network deployments

Why This Role

• Tackle new, high-impact problems in AI agent security
• Set the security standards for a growing engineering team
• Small team with direct access to leadership