About the Opportunity: We’re looking for a Senior QA Engineer to build and lead quality engineering for our software products. You’ll own quality across the software delivery lifecycle, with plans to grow the function by adding a junior QA engineer you’ll help mentor and develop.
This is a hands‑on role for someone experienced in both manual and automated testing who wants to shape how a team tests, not just execute test cases. We’re in the process of modernizing our test automation and development tooling, and you’ll play a key part in that evolution. You’ll help our engineers ship faster by improving how we test our products and building quality into every stage of development.
What You’ll Do: Own quality across the full software delivery lifecycle, from requirements review through release
Design and implement comprehensive test strategies for new features, enhancements, and existing applications
Design, develop, and maintain automated test suites using TestNG, and update existing automated tests as the application evolves
Create and execute manual and automated test plans, test cases, and regression suites
Perform functional, regression, integration, and API testing
Collaborate with developers, business analysts, and product owners to define acceptance criteria and testability requirements
Identify, document, and track defects through resolution, working with the development team to find root causes
Integrate automated tests into CI/CD pipelines to support continuous testing and faster releases
Mentor junior QA engineers and provide guidance on testing techniques and tools
Establish and promote QA best practices, standards, and processes across the team
What You Bring: 5+ years of experience in software quality assurance, including at least 3 years focused on test automation
Strong hands‑on experience designing and maintaining automated test suites with TestNG
Proficiency in Java or a similar object‑oriented programming language




Experience with UI automation tools such as Selenium WebDriver
Solid experience with API testing using tools such as Postman or REST Assured
Proven ability to write clear, thorough test plans, test cases, and regression suites
Experience working in a Microsoft‑centric environment (e.g., .NET applications, Azure DevOps, SQL Server)
Working knowledge of SQL for data validation and backend testing
Experience with CI/CD pipelines and version control systems such as Git
Familiarity with Agile/Scrum development methodologies
Strong analytical and problem‑solving skills with close attention to detail
Excellent communication skills and the ability to collaborate across technical and nontechnical teams
Experience mentoring or leading other QA engineers
What We Offer: Competitive base salary: $125,000-$150,000/year
Flexible vacation policy – take the time you need to recharge
Comprehensive health, vision & dental insurance
401k with company contribution
Beautiful downtown Denver office with company-paid commuter perks (parking or RTD EcoPass)
Opportunity for career progression with plenty of room for personal growth
What to Expect: 1st Round: 30‑45 minute interview with the Recruiter
2nd Round: 45-minute interview with the Hiring Manager
3rd Round: Pre-Interview Assessment and 2 hours of onsite interviews with the Hiring Team
Please note that we are fully onsite work environment, and require daily presence at our LoDo/Union Station (Denver) or Southpoint/Butler & 95 (Jacksonville) office. We are not considering remote, hybrid, or out-of-area candidates, and do not work with outside recruiting agencies.
MarketOnce will accept applications for this role on an ongoing basis.
MarketOnce is an Equal Opportunity Employer. We believe in creating a diverse and inclusive workplace where everyone has the opportunity to thrive. We are committed to hiring individuals based on their skills and qualifications, regardless of race, gender, age, sexual orientation, disability, or any other characteristic. We welcome and encourage applications from all backgrounds.

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📌 Senior QA Engineer (Ontario)
🏢 MarketOnce
📍 Ontario