Senior QA Engineer - Windows Internals - Remote

Overview

Our client is 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.

In Short

• 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

• Deep expertise in Windows internals and networking.
• Experience in application compatibility testing.
• Strong skills in manual and automated testing.
• Proficiency in using debugging tools like Process Monitor and WinDbg.
• Ability to file and document complex defects.
• Experience collaborating with technical teams.
• Knowledge of automation tools and scripting in Python, PowerShell, or C#.

Benefits

• Work with a deeply technical team.
• Opportunities for professional growth.
• Contribute to cutting-edge security software.
• Flexible work environment.