Design and build low-level Windows security components, including kernel drivers and user-mode services. Improve product CPU, memory, and startup performance; diagnose system issues with crash dumps, traces, and kernel debugging; lead driver certification; evaluate Windows APIs and security features; support endpoint protection development; resolve urgent platform issues; coach engineers; and serve as the senior technical authority for Windows platform concerns.

Execute manual and automated tests, identify and track defects, improve test coverage and efficiency, and integrate automated testing into CI/CD workflows. Collaborate with developers in an agile environment, perform requirements testing, troubleshoot complex issues, and strengthen QA processes for desktop applications and web services. The role also involves mentoring teammates and driving testing initiatives.