Halcyon · 6 days ago
Senior Windows Sustaining Engineer
United States
Full-time
Remote
Senior Level
$180K/yr - $220K/yrHalcyon is the industry’s first dedicated, adaptive security platform focused on stopping ransomware. The role involves supporting the development and long-term maintenance of the Halcyon Anti-Ransomware platform on Windows.
Artificial Intelligence (AI)ComputerCyber SecurityNetwork SecuritySoftware
Responsibilities
Kernel-mode and user-mode code development: write code that transforms messages, processes data, interfaces with components in different languages, and interacts with Web APIs
Diagnose and triage customer issues: analyze logs, crash dumps, and diagnostic data to identify root causes and drive timely resolutions
Cross-functional collaboration: work closely with customer support, sales teams, product management, and engineering teams to resolve customer issues, improve product quality, and ensure seamless integration across components
Optimization and profiling: use profiling tools to optimize code performance
Test and maintain code quality: write unit and integration tests, adhering to consistent coding styles and architectural guidelines
Qualification
Required
Proven ability to develop high-quality code in C++
Proven ability to troubleshoot and debug complex systems effectively
Proficiency with windbg in both user-mode and kernel-mode
Ability to identify performance bottlenecks using Window Performance Analyzer
Knowledge of Windows NT internals
Ability to modify and execute SQL statements
Preferred
Experience programming in Rust or a strong desire to learn Rust
Benefits
Comprehensive healthcare (medical, dental, and vision) with premiums paid in full for employees and dependents.
401k plan with 3% employer match
Short and long-term disability coverage, basic life and AD&D insurance plans.
Medical and dependent care FSA options.
Flexible PTO policy
Parental leave
Generous equity offering
Company
Halcyon
Halcyon is an anti ransomware and cyber resilience platform that eliminates the business impact of ransomware.
Founded in 2021
201-500 employees
H1B Sponsorship
Halcyon has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2023 (1)
Funding
Current Stage
Growth StageTotal Funding
$190MKey Investors
Bain Capital Ventures
2024-11-25Series C· $100M
2023-12-19Series B· $40M
2023-04-20Series A· $44M
Leadership Team
Jon Miller
CEO and Founder
Ryan Smith
CTO + Co-Founder
Recent News
2026-01-14
2025-12-02
2025-11-08
Company data provided by crunchbase