ON Energy Storage

End-to-end battery storage development with AI

Quality Assurance Engineer - Automation

Test Automation EngineeringConfirmed live in the last 24 hours

Full-timeMexico

About the Job

Requirements

Three to five years of QA experience with a strong focus on automation.
Proficiency in Python for test scripting.
Hands-on experience with Playwright and/or Selenium WebDriver.
Understanding of the software development life cycle, software testing life cycle, and manual and automated QA methodologies.
Experience with test management and bug-tracking tools such as JIRA, TestRail, or Zephyr.
Familiarity with version control and CI/CD pipelines.
Experience with API testing tools or libraries such as Postman, requests, or REST Assured.
Understanding of test design techniques, including boundary value analysis and equivalence partitioning.
Analytical, debugging, and communication skills.

Responsibilities

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

Desired Qualifications

Experience with pytest or unittest frameworks.
Exposure to Docker or containerized test environments.
Experience with BDD frameworks such as Behave, pytest-bdd, or Cucumber.
ISTQB certification.
Basic SQL and database validation skills.

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
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

Note: This position may include 20% annual business travel

#LI-AD1

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.

About the Company

ON Energy Storage

End-to-end battery storage development with AI

On.Energy Storage develops and manages end-to-end energy storage projects, focusing on grid-scale BESS and C&I peak-shaving for utilities, airports, and commercial & industrial customers. Its turnkey approach covers planning, construction, operation, and in-house financing, serving as a single point of responsibility for clients. The company uses On.Command, an AI-powered software for design, forecasting, control, and dispatch, with in-house analytics for real-time monitoring and optimization. It uses a technology-agnostic approach, applying the latest battery and power electronics to enable grid services like frequency regulation, energy arbitrage, and renewable integration, with a goal to scale deployments across North America and Latin America.

Company size: 201-500
Company stage: Debt Financing
Total funding: $262.6M
Headquarters: Miami, FL
Founded: 2016

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