Sr. Vulnerability Researcher (US) - VulnCheck

About VulnCheck

Exploitation prevention is only as strong as the intelligence driving those efforts, and most of the industry is still running on intelligence that lacks exploit context. VulnCheck, The Exploit Intelligence Company, delivers structured exploit intelligence on what is actively weaponized in the wild, purpose-built for the data lakes, ETL pipelines, automation, and AI and LLM workflows your infrastructure already runs on, raising the capability of everything it powers.

About the Role

We’re looking for a Senior Vulnerability Researcher to join our agentic vulnerability discovery team. This role sits within our Initial Access Intelligence group, which delivers exploits, detections, and other artifacts designed for active cyber defense. You'll work with a seasoned team of hackers and threat researchers to find and weaponize new vulnerabilities across a range of operating systems, platforms, and devices — before adversaries do.

You'll drive original research from exposure analysis and reverse engineering through vulnerability discovery and weaponized exploit development. You'll also help push the state of the art in how VulnCheck finds bugs by applying novel agentic approaches to vulnerability discovery and exploit creation. This is a 100% remote role based in the United States.

What You'll Do

• Conduct vulnerability research to identify net-new vulnerabilities across a range of operating systems, platforms, and devices
• Reverse engineer a variety of firmware and software
• Author original exploits, network rules (Suricata / Snort), and other artifacts (e.g., Docker containers, version scanners, ASM queries) to accompany new vulnerability finds
• Apply and expand agentic approaches to scale vulnerability discovery and exploit development

What You'll Bring

• 5+ years of full-time vulnerability research experience, including experience targeting networking device firmware, embedded Linux/RTOS-based systems, and/or network protocols
• Demonstrable experience with agentic approaches to vulnerability discovery and exploit development
• Experience developing original (weaponized) exploit code
• Comfort acquiring, unpacking, and analyzing target firmware and appliances, including reasoning about network protocols and unauthenticated attack surface
• Familiarity with embedded architectures (MIPS, ARM) and firmware extraction/unpacking (e.g., binwalk)
• Experience with dynamic analysis and debugging on embedded/emulated targets (e.g., QEMU)
• Working knowledge of common networking protocols (TCP/IP, routing protocols, VPN protocols such as IPsec/SSL-VPN, SNMP, etc.)
• Strong reverse engineering skills, including static and dynamic analysis of compiled binaries and firmware (VulnCheck uses Ghidra for reversing)
• Strong command of memory corruption and other vulnerability classes (e.g., stack and heap overflows, use-after-free, type confusion, integer errors, command and path injection, authentication and logic flaws)
• Solid working knowledge of C/C++ and at least one scripting language (e.g., Python)
• Experience working on technical projects remotely, alone, and on small teams

Preferred Qualifications

• Prior cybersecurity work experience (at a vendor or in government)
• A track record of discovering new vulnerabilities (e.g., CVEs, advisories, exploits, or published research)
• Able to share example research or exploit code written

Note: This position may involve access to technology subject to U.S. export control regulations. Employment is contingent upon the company's ability to authorize access under applicable export control, sanctions, and any other applicable legal or contractual requirements.

What We Offer

• Generous, flexible time off
• Retirement/pension plan contributions (e.g., 401k with match in the US; local pension schemes elsewhere)
• Comprehensive healthcare coverage
• Generous paid parental leave
• Remote-friendly environment with flexibility
• Support for home office costs (phone & internet)