Azure Cybersecurity Architect – FedRAMP, ATO
General Dynamics Information Technology
AzureCloudCyber SecurityTerraform
Senior Product Security Engineer
Halcyon
full-time
Posted on:
Location Type: Remote
Location: Remote • 🇺🇸 United States
Visit company websiteSalary
💰 $155,000 - $200,000 per year
Job Level
Senior
Tech Stack
Python
About the role
- 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
- 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
- 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)
Requirements
- 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.
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard skills
CC++PythonfuzzerslibFuzzerAFLWindows APIssecurity test harnessesroot-cause analysisuser-mode hooking
Soft skills
collaborationresearchtechnical content creation
