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Principal Agent Security Engineer
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Salary
≈ $176k – $363k per year (Estimated)
Location
In office (Sunnyvale)
Seniority
Principal · 8+ years exp
Visa
H-1B filings in 12 months: 125 · for this role: 4 · green card filings: 113
Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Oct 15, 2026. Fortinet scores A on the Alion truth index.
Overview
Company
Impact
Profile match
Fortinet is an American cybersecurity company founded in 2000 by two brothers who had previously built the intrusion prevention firm NetScreen. It is best known for FortiGate, a firewall built around custom silicon that gives it a price and throughput advantage over software-only competitors, and it has extended that installed base into a wide security platform covering secure access service edge, endpoint protection, security operations and switching and wireless. Headquartered in Sunnyvale and listed on Nasdaq, it sells almost entirely through channel partners and is unusually strong with mid-sized enterprises and service providers.
Backed by Redpoint Ventures, Five Elms Capital, SixThirty
Responsibilities
- Build AI security solutions for enterprise customers.
- Design and implement security controls for agentic AI systems.
- Provide technical leadership across product development, working closely with Product, Engineering, and QA teams to define architecture, drive technical decisions, and deliver secure and scalable solutions.
- Develop pre-sales and post-sales tools and environments to support customer evaluations, deployments, troubleshooting, and integration.
- Own and operate production services, including troubleshooting, performance optimization, reliability improvements, and ongoing hardening of security-critical systems.
- Research emerging technologies and security trends to identify new opportunities and develop innovative solutions.
- Drive technical strategy and product roadmap, including new feature design, architecture evolution.
Requirements
- Strong software engineering skills in Python or Go, or in a systems language such as Rust or C/C++.
- Bachelor’s degree or above in Computer Science, or equivalent practical experience.
- 8+ years of experience building and operating production backend services, including architecture ownership of security-critical and highly available systems.
- Strong system design and architecture skills, with the ability to make sound technical trade-offs across security, scalability, reliability, and performance.
- Self-driven and proactive, with strong problem-solving, debugging, and technical leadership skills and a focus on delivering high-quality solutions.
Strong Plus
- Experience with LLM and agent security, including areas such as prompt injection, tool poisoning, jailbreaks, and agent security controls.
- Agentic AI architecture - Deep understanding of MCP and A2A, with hands-on experience designing and building agentic AI systems, including tool-calling and agent frameworks.
- Cybersecurity background - Professional experience in application security, network security, identity, API security, or other cybersecurity domains.
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