Senior Security Researcher / Reverse Engineer / Windows Product Security

NO SPONSORSHIP - NO OPT's

Senior Product Security Engineer

SALARY: $180,000 - 220,000 plus 10% plus pre-IPO stock options

LOCATION: remote

Looking for a security researcher proficient in reverse engineering experience. You will be analyzing malware and have an understanding of cryptography. Ability to develop tools to augment existing capabilities, endpoint hardening and testing. Endpoint focused, hands on testing window based agents EDR/AV products C++, Rust  Python Windows APIs rust development FFI or unsafe code CI platforms GitHub actions jenkins

Key Responsibilities

• Endpoint Hardening & Testing
• Design and implement security test harnesses from scratch to simulate real-world ransomware behavior
• Develop and integrate fuzzers (libFuzzer, AFL/WinAFL, or custom tools) for automated crash and vulnerability discovery
• Build user-mode hooking instrumentation and explore EDR bypass techniques to exercise agent internals
• Vulnerability Research & Triage
• Triage, reproduce, and analyze security findings against our agent and libraries
• Perform root-cause analysis on crashes or logic flaws; build minimal PoC exploits or reproducer cases
• Platform Expertise
• Deep understanding of Windows internals (ring transitions, memory management, Win32 API) with focus on user-mode security hooks
• Collaborate on driver-level or API-level integrations when necessary (no kernel-driver dev required)

Required Technical Skills

• 5+ years in product security or endpoint-focused consulting, with hands-on testing of Windows-based agents or EDR/AV products
• Experience building fuzzers or integrating existing fuzzing frameworks for native code
• Experience and capability in building automated test harnesses from the ground up
• Strong Windows OS internals knowledge, especially user-mode hooking and Win32 API behaviors
• Proficient in C/C++ and Python, with solid experience calling with Windows APIs
• Experience reviewing and validating security findings
• Comfortable researching and suggesting security features end-to-end and creating technical content

Benefits:

• Comprehensive healthcare (medical, dental, and vision) with premiums paid in full for employees and dependents.
• 401k plan with a generous employer contribution.
• Short and long-term disability coverage, basic life and AD&D insurance plans.
• Medical and dependent care FSA options.
• Flexible PTO policy.
• Parental leave.
• Generous equity offering.