QA Test Engineer, Industrial

Litmus

. Build and own automated test coverage for southbound connectors using OPC-UA, Modbus, EtherNet/IP, PROFINET, and DNP3 .

Posted 10/30/2026full-timeToronto • CanadaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in software test automation, particularly in building and maintaining automated test coverage for industrial protocols and REST APIs. Proficient in using tools like GitLab, Jira, and Xray to manage testing processes and results.

Highest-signal resume keywords

Software Test AutomationREST API Test AutomationGo ProgrammingIndustrial Protocols KnowledgeGitLab CI Pipelines

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Test AutomationGoPythonREST APIOPC-UAModbusEtherNet/IPPROFINETDNP3Load Testing

Tools & Technologies

GitLabJiraXrayDockerLinux

Industry Keywords

IIoTPLCsDevice SimulatorsHardware-in-the-Loop TestingPerformance Testing

Tech Stack

Tools & technologies

DockerLinuxPythonC++Go

About the role

Key responsibilities & impact

Build and own automated test coverage for southbound connectors using OPC-UA, Modbus, EtherNet/IP, PROFINET, and DNP3
Write end-to-end tests that drive Litmus Edge through its REST API
Maintain tests in GitLab pipelines for every internal build
Build protocol and device simulators to avoid dependence on physical hardware
Separate development tests from regression tests
Run regression suites on LTS builds and on an agreed cadence
Test upgrades, backward compatibility, load behavior, and long soak runs
Triage pipeline failures and distinguish product bugs from infrastructure noise
Maintain test cases and results in Jira and Xray
Review ticket acceptance criteria at the start of development
Work closely with industrial developers and engineering teams in the United States and Canada

Requirements

What you’ll need

5+ years in software test automation
At least 3 years writing test code in Go, Python, or a similar language
Hands-on REST API test automation, including changing system state through API calls
Working knowledge of at least two industrial or IIoT protocols, such as OPC-UA, Modbus, EtherNet/IP, PROFINET, DNP3, or MQTT
Comfortable with Linux, Docker, and CI pipelines, preferably GitLab
Experience reading pipeline logs to determine failure causes
Experience building device or protocol simulators or hardware-in-the-loop test setups is nice to have
C++ or Golang development experience is nice to have
Playwright or similar modern UI automation is nice to have
Jira and Xray experience is nice to have
High-level understanding of PLCs is nice to have
Performance, load, or soak testing experience is nice to have
Must answer the visa sponsorship question; the posting states that Litmus does not offer visa sponsorship at this time

Benefits

Comp & perks

Hybrid work option in Santa Clara or Toronto
Remote work option in the United States or Canada
Work on industrial AI infrastructure and real-world production systems
Ownership, visibility, and ability to shape the product and company
Collaborative, curious, low-ego culture
Work alongside experienced operators, engineers, and leaders