Windows Kernel Software Developer

ThreatLocker is hiring a Windows Kernel Software Developer to design and maintain kernel-mode components for its Zero Trust security platform in Orlando, FL.

Responsibilities

• Design and implement Windows kernel-mode filter drivers, including file system minifilters, registry filters, and network filters
• Build security monitoring and enforcement for file, process, registry, and network activity
• Investigate Windows internals to create low-level, bypass-resistant security features
• Use kernel debugging and analysis workflows, including crash dump analysis and performance tuning
• Develop secure, stable, and maintainable driver code
• Maintain compatibility across supported Windows versions and platform changes
• Collaborate with user-mode, QA, DevOps, and security engineering teams

Requirements

• 5+ years of hands-on experience developing Windows kernel-mode drivers
• Experience developing Windows filter drivers
• Strong knowledge of Windows system internals, including memory management, I/O, processes, and the object manager
• Strong C/C++ development skills
• Experience with the Windows Driver Kit (WDK)
• Strong experience with kernel debugging and crash analysis
• Experience with kernel synchronization, concurrency, and performance-sensitive code
• Strong problem-solving skills with a security-first engineering mindset

Technologies

• WinDbg
• ETW
• WPP
• Windows Driver Kit (WDK)
• C/C++

Preferred Qualifications

• Experience with Windows file system minifilters and Filter Manager
• Experience with Windows Filtering Platform (WFP)
• Experience with registry filtering and process monitoring
• Experience with endpoint security, EDR, anti-malware, application control, or Zero Trust products
• Experience with WinDbg, Driver Verifier, ETW, and WPP tracing
• Experience with reverse engineering or malware analysis
• Familiarity with Windows kernel threat models and secure coding practices
• Exposure to Microsoft driver signing, WHQL, HLK, and driver submission processes
• Contributions to security research, open-source projects, publications, or technical talks

Working Conditions

• In-office role in Orlando, Florida
• Generally performed in an office environment; occasional travel may be required
• Must occasionally lift and/or move up to 25 pounds
• Background check and drug/substance screening required after a conditional offer; employment proceeds only with clear results
• Randomized drug and substance testing approximately every 60 days, using the same screening standards