Senior EndPoint Ransomware Product Engineer

Senior EndPoint Ransomware Product Engineer We are unable to sponsor for this permanent full-time role

Position is bonus eligible

Prestigious Enterprise Security Services Company is currently seeking a Senior Ransomware and EndPoint Security Product Engineer. Candidate will analyze ransomware samples and threat actor tools to gain insights for future product features, threat actor insights, and assist in the validation of our current capabilities.

The ideal candidate will be a proficient reverse engineer with experience in analyzing malware, a strong understanding of cryptography used in ransomware, and the ability to develop tools to augment existing capabilities.

Responsibilities

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)

Qualifications

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

Rust development experience, particularly around FFI or unsafe code

Published tooling or research in vulnerability discovery, fuzzing, and/or automated test frameworks

Hands-on experience with CI platforms (GitHub Actions, Jenkins) to automate security workflows

Seniority level Mid-Senior level

Employment type Full-time

Job function Information Technology

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