Role & seniority: Experienced QA/quality assurance engineer (senior-level) focused on ensuring high-quality code and product reliability.

Stack/tools: Python with Pytest; RESTful API and gRPC; Windows and Linux endpoint agent testing; debugging tools (Windows debuggers, profilers, monitors); virtualization (VMware); SQL; independent documentation and technical writing; CI/CD familiarity (GitHub/TBD).

Top 3 responsibilities

Design, implement, and validate new product features and bug fixes via automated tests.
Document test plans, automate test scripts, and create testing tools; maintain test automation architectures.
Ensure adherence to coding style; contribute to technical documentation and test reports; work autonomously and within the team.

Must-have skills

Proficiency in Python and Pytest; strong test design creativity.
Experience with RESTful API and gRPC; troubleshooting Windows applications (debuggers, profilers, monitors).
Familiarity with virtualization (VMware) and SQL; experience testing Windows and Linux endpoint agents; strong written/verbal communication for technical docs.

Nice-to-haves

Prior testing of enterprise security products; macOS virtualization/testing; knowledge of Windows/Linux/macOS security models.
Additional languages (Rust, C++); Windows performance testing and benchmarking; AWS familiarity; GitHub CI/CD experience.

Location & work type: Remote-native, distributed global team; full-time role wit

Full Description

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

Senior Agent Test Automation Engineer