Quality Assurance Engineer - Automation

ON.energy; México; On-site; MXN 400,000 - 650,000; Full time

Job summary

ON.energy is seeking a QA Engineer with strong Python skills and hands-on UI automation experience to design, build, and maintain automated test suites for its scalable platforms. You will apply best practices in test design and work closely with developers to ensure high-quality releases.

You will design and implement a robust test strategy, collaborate with product owners, and contribute to CI/CD integrations while maintaining comprehensive test documentation and reporting.

Qualifications

• 3–5 years of QA experience with automation focus.
• Proficient in Python for test scripting.
• Hands-on experience with Playwright and/or Selenium.
• Experience with API testing and CI/CD.
• Familiarity with JIRA, TestRail, Zephyr.
• Good communication and debugging skills.

Responsibilities

• Design and maintain automated UI tests with Playwright/Selenium.
• Build scalable test frameworks (Page Object Model).
• Perform API testing and validate backend functionality.
• Integrate tests into CI/CD pipelines (Jenkins, GitHub Actions, GitLab, Azure DevOps).
• Log defects in JIRA and analyze results to improve stability.
• Collaborate with developers and product owners on test strategy.
• Maintain test documentation and coverage reports.
• Review test scripts and framework improvements.

Skills

Python

UI automation

Test automation

Debugging

Analytical skills

Tools

Playwright

Selenium WebDriver

Postman

REST Assured

Jenkins

Git

CI/CD pipelines

Job description

ON.energyis 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
• 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

Note: This position may include 20% annual business travel

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
• 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.