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Principal Kernel Engineer

Halcyon is a remote-native security company building an adaptive anti-ransomware platform that combines proprietary prevention engines and AI. We are seeking a Principal Kernel Engineer with deep Windows internals expertise to lead kernel-mode architecture, ship robust drivers, debug complex issues, and mentor other engineers.

Skills

  • 15+ years of professional Windows kernel development experience
  • Proven history of shipping production-quality Windows drivers (file system, networking, security)
  • Advanced C++ skills in kernel-mode and user-mode (multithreading, synchronization, lock-free programming)
  • Expert debugging skills (WinDbg, KD, crash dump analysis)
  • Deep knowledge of NT internals, Win32 APIs, IRQL, and OS-level performance tuning
  • Experience designing for stability, security, and performance in security-critical environments
  • Strong written and verbal communication and mentoring ability

Responsibilities

  • Design, implement, and optimize Windows kernel-mode components that prevent, detect, and respond to ransomware.
  • Develop secure, high-performance Windows drivers (file system mini-filters, network callouts, process/thread monitoring).
  • Investigate and resolve complex kernel issues including race conditions, memory corruption, and stability problems.
  • Perform crash dump analysis and advanced debugging using WinDbg and KD.
  • Define technical direction and architecture for Windows agent kernel components, balancing security and performance.
  • Mentor and guide engineers on kernel-mode best practices, secure coding, and driver lifecycle management.
  • Collaborate with product, security, and senior engineering teams to translate requirements into kernel solutions.

Education

  • Bachelor's degree in Computer Science, Engineering, or equivalent experience (degree not required if equivalent experience exists)

Benefits

  • Comprehensive healthcare (medical, dental, vision) with premiums paid in full for employees and dependents
  • 401(k) plan with generous employer contribution
  • Short- and long-term disability, basic life and AD&D coverage
  • Medical and dependent care FSA options
  • Flexible PTO policy and parental leave
  • Generous equity offering
  • Potential discretionary bonuses/incentives
To read the complete job description, please click on the ‘Apply’ button
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Average salary estimate

$255000 / YEARLY (est.)
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$235000K
$275000K

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SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$235,000/yr - $275,000/yr
EMPLOYMENT TYPE
Full-time, remote
DATE POSTED
August 16, 2025
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