Quality Assurance Engineer

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers. 

Job Summary

We are looking for a QA Engineer with strong Python skills and hands-on experience in UI automation (Playwright, Selenium) to design, build, and maintain automated test suites. You'll work closely with developers and product teams to ensure high-quality releases through a mix of automated and manual testing practices.

Key Responsibilities

• Design, develop, and maintain automated UI test scripts using Playwright and/or Selenium with Python
• Build and maintain a scalable test automation framework (Page Object Model or similar design patterns)
• Perform API testing (using Postman, requests library, or REST Assured) to validate backend functionality
• Integrate automated tests into CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI, Azure DevOps)
• Identify, log, and track defects through resolution using tools like JIRA
• Analyze test results, debug failures, and maintain test stability (handling flaky tests, waits, synchronization issues)
• Collaborate with developers and product owners to understand requirements and define test strategy/coverage
• Participate in Agile/Scrum ceremonies (sprint planning, stand-ups, retrospectives)
• Maintain test documentation — test plans, test cases, and automation coverage reports
• Contribute to code reviews of test scripts and automation framework improvements

Required Skills & Qualifications

• 3–5 years of QA experience with a strong focus on automation
• Proficient in Python for test scripting
• Hands-on experience with Playwright and/or Selenium WebDriver
• Solid understanding of SDLC, STLC, and QA methodologies (manual + automated)
• Experience with test management/bug tracking tools (JIRA, TestRail, Zephyr)
• Familiarity with version control and CI/CD pipelines
• Experience with API testing tools/libraries (Postman, requests, REST Assured)
• Strong understanding of test design techniques (boundary value analysis, equivalence partitioning, etc.)
• Good analytical, debugging, and communication skills

Preferred/Nice-to-Have

• Experience with pytest or unittest frameworks
• Exposure to Docker/containerized test environments
• Experience with BDD frameworks (Behave, pytest-bdd, Cucumber)
• ISTQB certification
• Basic SQL/database validations

For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays 

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities
• Opportunity to grow with a mission-driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Benefits vary by role and location and are subject to change.

Agency Notice: ON.energy does not accept unsolicited resumes from staffing agencies, search firms, or third-party recruiters. Resumes submitted without a fully executed Master Services Agreement (MSA) and a written request from an authorized member of our Talent Acquisition team will be considered the property of ON.energy. No placement fees or compensation will be paid for unsolicited candidate submissions.