Senior QA Engineer - Windows Internals

We're looking for a highly technical QA Engineer with deep expertise in Windows internals, networking, and application compatibility testing. You will be responsible for validating low-level functionality such as drivers, hooks, and system APIs across our Windows Secure Enclave platform. This is not a checkbox QA role — you’ll be reverse-engineering app behaviors, designing compatibility matrices, and creating regression suites that validate complex interactions between Windows components, 3rd party software, and integrations into the Windows ecosystem.

This role sits within a deeply technical team building endpoint security and system-level compatibility software for unmanaged or BYOD endpoints. You’ll work side-by-side with developers who write kernel-mode and user-mode code.

About the role :

• Design and execute test strategies for low-level Windows functionality : file system filters, network stack integrations, kernel / user hooks, etc.
• Test application compatibility for hundreds of real-world desktop applications in containerized / sandboxed environments.
• Build and maintain robust manual and automated regression test suites.
• Investigate complex system interactions, using tools like Process Monitor, WinDbg, ETW, and Sysinternals.
• File, isolate, and document hard-to-reproduce defects with deep system context.
• Collaborate with developers and product managers to understand technical requirements and corner cases.
• Develop automation tools and scripts (Python, PowerShell, C#) to streamline regression and compatibility testing.

Requirements

Benefits

Salary Range :  $6500 USD / month + Holidays

Unlimited PTO