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# Windows System Software Engineer

- **Company:** CI-LAKESIDE, LLC
- **Location:** Sunnyvale, CA, United States
- **Salary:** $150,000 - $250,000
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Application Programming Interfaces (APIs), Computer Programming, Software Debugging, File Systems, Monitoring of Systems, Hypervisor, Intrusion Detection and Prevention, Kernel Debuggers, Windows API, Parsing, Reverse Engineering, Software Engineering, WinDBg, JavaScript Pagination Plugin, Multithreading, Cloud Platform System, Windows Kernel, Windows Security, Build Tools
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25197_cd48b820fbeb8432cb3fc8e461b3110a

## About the Role

* Extensive experience building low-level Windows systems software.
 * Deep expertise in Windows kernel architecture and NT internals.
 * Extensive experience developing Windows kernel drivers.
 * Strong knowledge of process, thread, memory, and object management.
 * Expert-level C/C++ programming skills.
 * Experience debugging complex multithreaded systems.
 * Strong understanding of synchronization, paging, interrupts, and x64 architecture.
 * Experience using WinDbg and kernel debugging tools.
 * Ability to reason about undocumented operating system behavior through analysis and debugging., * Rust experience.
 * Filesystem minifilters.
 * Windows Filtering Platform (WFP) or NDIS.
 * ETW provider development.
 * Hypervisor technologies (VT-x / AMD-V).
 * Secure Kernel, VBS, or HVCI knowledge.
 * Memory forensics or reverse engineering experience.
 * Symbol parsing and Windows build analysis.

## Description

We are looking for an exceptional Windows systems engineer with deep expertise in Windows kernel internals, operating system architecture, and endpoint technologies, who understands Windows below the Win32 API, from the NT kernel and executive subsystems to process lifetime management, memory internals, and modern platform security.

This is not an application development, framework engineering or WinAPI-only developer role.

You'll be designing and building the low-level endpoint infrastructure that powers real-time telemetry, behavioral detection, and system instrumentation across modern Windows environments.

You'll work across kernel-mode and user-mode, developing production-grade systems that operate reliably in highly concurrent, security-sensitive environments., * Work directly with Windows NT internals beyond documented APIs.

 * Build systems that understand process, thread, memory, and object lifecycles.
 * Analyze scheduler behavior, process creation, and teardown.
 * Work with Windows internals including, * Design telemetry systems that power endpoint detection and response.
 * Build behavioral detection capabilities using operating system telemetry.
 * Research modern attack techniques and operating system abuse.
 * Improve visibility into process execution, code loading, and system activity.
 * Design resilient monitoring systems that operate in complex enterprise environments.
 * Evaluate modern Windows security features and how they impact endpoint architecture.

Reverse Engineering & Debugging

 * Analyze Windows internals and system behavior.
 * Debug kernel crashes, memory corruption, and race conditions.
 * Reverse engineer operating system components when documentation is unavailable.
 * Use debugging and reverse engineering tools to understand low-level execution paths.