Halcyon
Halcyon is a remote-native cybersecurity company focused on stopping ransomware. This role is for an experienced engineer to develop and maintain the Halcyon Anti-Ransomware platform on Windows. The position supports long-term product development and stability across kernel- and user-mode components.
Headquarters
San Diego, California, United States
Company Size
51-200 employees
Founded
2021
Halcyon Tech, Inc. is an American cybersecurity software and services company headquartered in Austin, TX that builds an anti‑ransomware and cyber‑resilience platform for large enterprises. The platform combines the fastest endpoint recovery methods with layered resiliency — including bypass and evasion protection, key capture and automated decryption, and data extortion prevention — to undo ransomware attacks in minutes. Targeting Global 2000 customers, Halcyon provides prevention, recovery, emergency response and research capabilities to minimize downtime and operational impact from ransomware‑as‑a‑service threats.
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
View leadership team, funding history,
and employee contacts for Halcyon.
Dec 2, 2025
Principal Software Engineer - Windows EDR
Threatdown
Windows Low Level Engineer - Endpoint Security
SentinelOne
Windows Low Level Engineer - Endpoint security
SentinelOne
Windows Low Level Engineer - Endpoint Security
SentinelOne
Windows Low Level Engineer - Endpoint Security
SentinelOne
Senior Windows Device Driver Engineer
Mitsogo Inc