Staff Product Security Engineer

Greenlight is seeking a Staff Product Security Engineer to join its Security team. The successful candidate will be responsible for the end-to-end security of consumer products, digital platforms, and an emerging hardware device line.

The Staff Product Security Engineer will:

• Lead security architecture/design reviews and threat modeling sessions with product and engineering teams
• Translate threats into actionable, risk-rated engineering remediations prioritized by severity
• Conduct hands-on penetration testing and security assessments across the full product stack
• Drive PSIRT operations, including triaging incoming vulnerability reports and coordinating remediation with engineering
• Champion secure AI adoption and establish security guardrails for AI-powered products and AI-assisted development workflows

The ideal candidate will have:

• 10+ years of product security experience spanning application security, cloud security, and secure SDLC
• Expert-level threat modeling skills using STRIDE, PASTA, or equivalent
• Hands-on penetration testing skills across applications, APIs, cloud infrastructure, and hardware/firmware
• PSIRT operational experience, including vulnerability intake and triage
• Deep hands-on AI security expertise and understanding of OWASP Top 10 for LLM, API, Web, Mobile

Benefits include:

• Medical, dental, vision, and HSA match
• Paid life insurance, AD&D, and disability benefits
• Traditional 401k with company match
• Unlimited PTO
• Paid company holidays and pop-up bonus holidays
• Professional development stipends
• Mental health resources
• 1:1 financial planners
• Fertility healthcare
• 100% paid parental and caregiving leave
• Flexible WFH, remote, and in-office opportunities