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Job details

Windows Sustaining Engineer

Halcyon is a remote-native cybersecurity company focused on building an adaptive anti-ransomware platform powered by proprietary prevention engines and AI models. We are seeking an experienced Windows Sustaining Engineer to diagnose, triage, and resolve customer issues while contributing to long-term maintenance and development of our Windows platform across user- and kernel-mode.

Skills

  • Proven troubleshooting and debugging of complex Windows systems
  • Proficiency with WinDbg in both user-mode and kernel-mode
  • Experience using Windows Performance Analyzer to find performance bottlenecks
  • Strong C++ development skills and ability to produce high-quality code
  • Experience with or strong desire to learn Rust
  • Knowledge of Windows NT internals and kernel concepts
  • Strong written and verbal communication and cross-team collaboration skills

Responsibilities

  • Diagnose and triage customer issues using logs, crash dumps, and diagnostic data to identify root causes and drive resolutions
  • Collaborate cross-functionally with customer support, sales, product management, and engineering to resolve issues and improve product quality
  • Develop and maintain kernel-mode and user-mode code that interfaces with components, transforms messages, and calls Web APIs
  • Profile and optimize code performance using Windows Performance Analyzer and other profiling tools
  • Write and maintain unit and integration tests; follow coding standards and architectural guidelines
  • Document troubleshooting steps, fixes, and knowledge base articles to support customers and internal teams

Education

  • Bachelor's degree in Computer Science, Computer Engineering, or a related field OR equivalent practical experience
  • Relevant continuing education or certifications in systems, security, or Windows internals are a plus

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 insurance
  • Medical and dependent care FSA options
  • Flexible PTO policy and parental leave
  • Generous equity offering and eligibility for discretionary bonuses/incentives
To read the complete job description, please click on the ‘Apply’ button
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$190000 / YEARLY (est.)
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$160000K
$220000K

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Our Mission: Defeat Ransomware Modern defensive cyber solutions, while impressive, have failed in the face of cheap and easy-to-create – and most importantly lucrative – ransomware. High-profile breaches are disguising an ugly fact; the companies ...

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TEAM SIZE
SALARY RANGE
$160,000/yr - $220,000/yr
EMPLOYMENT TYPE
Full-time, remote
DATE POSTED
August 19, 2025
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