Senior Kernel Engineer
1/26/2026
The role involves kernel-mode and user-mode code development for the Halcyon Anti-Ransomware platform, as well as diagnosing and triaging customer issues. Additionally, the engineer will collaborate with various teams to improve product quality and ensure seamless integration.
Salary
180000 - 220000 USD
Working Hours
40 hours/week
Company Size
201-500 employees
Language
English
Visa Sponsorship
No
What we do:
Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.
Who we are:
Halcyon was formed in 2021 by a team of cyber industry veterans after battling the scourge of ransomware (and advanced threats) for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.
As a remote-native, completely distributed global team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we'll work a plan to meet your needs.
The Role:
Halcyon’s goal is to deliver an anti-ransomware solution that breaks new ground as to what an amazing security product can deliver. Aligned with this goal, Halcyon is looking for an experienced Senior Kernel Engineer to contribute to our Windows agent’s ability to prevent, detect, respond, and remediate attacks. In this role, you will drive enhancements in multiple product domains. This development will allow Halcyon’s product to better protect customers from the threat of ransomware.
Responsibilities:
- Develops prototypes for new features
- Contributes to functional specifications and project plans for new product features
- Writes high quality code in the form of new features, bug fixes, and performance enhancements
Skills and Qualifications:
- Writes high-quality multithread-safe code in C++ in both kernel-mode and user-mode
- Works independently with little to no direction, and demonstrates solid engineering practices (planning, documentation, unit testing, etc.)
- Has shipped at least one production quality driver for Windows NT
- Strong knowledge of Win32 APIs and NT kernel internals
- Debugs memory corruption issues and improves end-to-end system performance
- Above average written and verbal communication skills
Bonus skills and Qualifications:
- Collaborative with an ability and desire to mentor and inspire others
- Knowledge and experience with Portable Executable format, Reverse Engineering
- Experience with Windows Mini-Filter drivers and Windows Filter Platform callout drivers
- Experience with SQL/Databricks and prior experience developing automated telemetry
- Familiarity with tools for Rust / C++ interoperability
Benefits:
Halcyon offers the following benefits to eligible employees:
- 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
The Company reserves the right to modify or change these benefits programs at any time, with or without notice.
#LI-NOSCRAPE
The expected base salary range for this position is $180,000-230,000 Compensation varies based on a variety of factors which include (but are not limited to) role level, skills and competencies, qualifications, knowledge, location, and experience. In addition to base pay, certain roles are eligible to participate in our bonus or commission plans, as well as our benefits offers, and equity awards.
In accordance with applicable state and federal laws, the range provided is Halcyon’s reasonable estimate of the base compensation for this role. The actual amount may differ based on non-discriminatory factors such as experience, knowledge, skills, abilities, and location. Base pay is one part of the total package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and equity in the Company.
We understand it takes a diverse team of highly intelligent, passionate, curious, and creative people to develop the exceptional product we are building. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity employer.
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