Senior Software Security Engineer

Responsibilities

• Partner with engineering teams to identify system risks before release and build secure frameworks and libraries that encourage control adoption.
• Build and maintain identity and secrets management systems, including credential issuance, rotation, and workload authentication.
• Harden cloud security controls and support cloud security posture management through infrastructure-as-code scanning, misconfiguration detection, and automated remediation.
• Design security models for AI agents, including permission boundaries, prompt-injection defenses, and strict tenant isolation.
• Raise engineering security standards through design reviews and coaching.

Requirements

• 5+ years of software engineering experience building and maintaining security-relevant systems in production.
• Experience leading a security initiative from design through adoption.
• Hands-on experience with identity and secrets management, including OAuth 2.0 and OIDC.
• Familiarity with Kubernetes security primitives including RBAC, namespaces, network policies, and admission controllers.
• Ability to reason about trust boundaries and threat models and prioritize risk.
• Bonus: experience with SAST, dependency scanning, secure build infrastructure, SAML, SPIFFE/SPIRE, workload authentication systems, or securing LLM-based and agentic systems.

Benefits

• Competitive compensation packages with meaningful ownership.
• Flexible PTO, 401k, wellness benefits including free therapy sessions, technology and work-from-home reimbursement, and flexible work schedules.
• Remote-first work environment; Fieldguide is based in San Francisco, California.