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About the Role
We are seeking a Senior Product Security Engineer to own and evolve our platform's security architecture, including authentication, authorization, secrets management, encryption, and data isolation. You will write production code to harden these systems and set security engineering standards for the entire team, ensuring security is designed in from the start.
Responsibilities
- Take formal ownership of Harmonic's platform security architecture and evolve it
- Write production code that directly hardens and extends security patterns in our core platform
- Set security engineering standards for the wider engineering team and enforce them
- Manage your own backlog of platform security improvements, prioritized independently of the product roadmap
- Run threat modeling and architecture reviews on major new systems and integrations
- Partner directly with engineering leads to embed the right patterns at design time
- Keep our own security posture ahead of customer expectations
- Stay current on the threat landscape relevant to AI agent security, sensitive data handling, and multi-tenant SaaS platforms
Requirements
- 6+ years of hands-on software engineering experience, with deep specialization in security architecture
- Proven track record designing and personally implementing platform-level security controls in production (OAuth/OIDC/SAML, encryption, secrets and key management, multi-tenant isolation)
- Strong grounding in threat modeling and secure-by-design principles
- Comfort setting technical standards that other engineers are expected to follow
- Experience with cloud security fundamentals (AWS, GCP, or Azure) - IAM, network security, container and Kubernetes security
- A track record of shipping secure, reliable, production-grade code
Skills
- Security architecture
- Platform-level security controls
- Threat modeling
- Secure-by-design principles
- Cloud security fundamentals
- AWS
- GCP
- Azure
- IAM
- Network security
- Container security
- Kubernetes security
- Production code development
- AI tools
Location
- Remote
Work Type
- Hybrid
- Full-time
Experience Level
- Senior
Benefits
- 401K
- Pension plan
- Generous PTO
About the Company
- Harmonic Security governs AI, providing a platform that understands user/agent intent and data context in real time for security teams.
- We operate at the intersection of AI and cybersecurity, building solutions to protect sensitive data in real time.
- Harmonic is recognized on the Rising in Cyber 2026 list and backed by investors N47, Ten Eleven Ventures, and In-Q-Tel.
- Our mission is to help enterprises adopt AI safely and at scale, using AI tools internally to work smarter and faster.
- We are a small, high-trust team valuing transparency, creativity, and continuous learning.