Security Engineer
San Francisco, CA$230k - $390kFull-timePosted 11mo ago
About the role
Security Engineering builds the foundations that let Sierra deliver powerful AI agents while protecting customer data and trust. The role focuses on designing secure-by-default systems, cross-cutting security primitives, threat modeling, detections, and automating security workflows across product, infrastructure, and cloud environments.
Responsibilities
- Build the Foundations of Trust. Design and ship systems and controls that make Sierra secure by default — spanning product security, infrastructure security, enterprise security, identity, and detection and response. You’ll work across all layers of our platform to identify risk, strengthen architectures, and build durable defenses.
- Own Cross-Cutting Systems. Partner with product, platform, and infrastructure team to threat model designs, review code and architectures, and implement and evolve Sierra’s security primitives. You’ll make pragmatic design trade-offs between usability, performance, reliability, and security.
- Find and Reduce Real Risk. Identify vulnerabilities, investigate suspicious behavior, and improve detections and response workflows across applications, cloud infrastructure, identity, endpoints, and internal systems. Turn what you learn into systemic fixes and controls that prevent entire classes of issues.
- Automate and Scale Security Workflows. Create developer-friendly tooling to reduce risk and friction — whether through automating security checks in CI/CD, building secure paved paths, improving vulnerability discovery, or instrumenting high-signal detection and response.
Qualifications
- Deep Security Expertise. Strong security fundamentals and depth in at least one domain, such as product security, platform or cloud security, enterprise security, identity, detection and response, or offensive security.
- Product and Platform Mindset. You care about building secure, scalable systems that enable, not block, innovation.
- Software Engineering and Systems Thinking. You’re comfortable reading and writing code, understanding how production systems fit together, and building pragmatic software solutions to security problems.
- Curiosity and Ownership. You take ambiguous, cross-cutting problems from first principles to production and own the solution in production.
Skills
Required:Security fundamentalsProduct and platform mindsetSoftware engineeringCuriosity and ownership
Benefits
- Flexible (unlimited) paid time off
- Medical, dental, and vision benefits for you and your family
- Life insurance and disability benefits
- Retirement plan dependent on country of employment
- Parental leave
- Fertility and family building benefits through Carrot
- Lunch, snacks and coffee
- Discretionary benefit stipend
- Free alphorn lessons
Last updated Sep 16, 2026. Interested? Apply on the company site.
About Sierra
Better customer experiences. Built on Sierra.
Sierra helps businesses build better, more human customer experiences with AI.
AICustomer ExperienceCustomer SupportVoiceai-agents-and-applicationsorchestrationvoice-ai-stackwing-list-2026
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