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Halcyon

Senior Agent Test Automation Engineer

Sorry, this job was removed at 08:28 a.m. (CST) on Tuesday, Feb 17, 2026
Remote
Hiring Remotely in US
Remote
Hiring Remotely in US

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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 a security product can deliver. Aligned with this goal, Halcyon is looking for an experienced engineer to contribute to our quality assurance practices, ensuring that Halcyon’s code maintains a high-quality standard. The high-quality code will ensure Halcyon’s product functions properly across all scenarios, helping protect customers from ransomware threats.

Responsibilities:
  • Design, implement, and contribute to validation testing of new product features and bug fixes
  • Document and develop automated tests aligned to the features we’re developing and bug reports
  • Design, document, and develop tools to assist with testing
  • Contribute to and follow our Coding Style guidelines
  • Able to deliver quality results working autonomously and as part of a unit
  • Technical documentation of test plans, automation implementation architectures, and test reports
  • Be a part of the company culture’s growth
Skills and Qualifications:
  • Ability to develop in Python using the Pytest framework
  • Test design creativity
  • Understanding and experience with communications channels such as RESTful API and gRPC
  • Ability to troubleshoot Windows applications using tools such as debuggers, system profilers, and process monitors
  • Knowledge and experience using virtualization tools such as VMWare
  • Familiarity with SQL
  • Experience testing Windows endpoint agent applications
  • Experience testing Linux endpoint agent applications
  • Good written and verbal communication with an ability to write technical documentation
  • Fast-paced startup, past work experience
Bonus Skills and Qualifications:
  • Past work experience in testing and delivering an enterprise-level security product
  • Experience with macOS virtualization and testing
  • Knowledge of the Windows Security Model
  • Knowledge of the Linux Security Model
  • Knowledge of the MacOS Security Model
  • Knowledge of additional languages: Rust, C++
  • Experience with Windows performance testing and benchmarking
  • Familiarity with the AWS Cloud
  • Background using GitHub for CI/CD purposes
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 a generous employer contribution.
  • 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.
Base Salary Range: $140,000 - $180,000
Bonus Target: 10%
 
#LN-DNI

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.

HQ

Halcyon Austin, Texas, USA Office

Austin, Texas, United States, 73301

What you need to know about the Austin Tech Scene

Austin has a diverse and thriving tech ecosystem thanks to home-grown companies like Dell and major campuses for IBM, AMD and Apple. The state’s flagship university, the University of Texas at Austin, is known for its engineering school, and the city is known for its annual South by Southwest tech and media conference. Austin’s tech scene spans many verticals, but it’s particularly known for hardware, including semiconductors, as well as AI, biotechnology and cloud computing. And its food and music scene, low taxes and favorable climate has made the city a destination for tech workers from across the country.

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