Senior QA Engineer

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.

• 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

• 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 Web Driver
• 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 Dev Ops, 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

• 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 benefits (parking or RTD Eco Pass)
• Opportunity for career progression with plenty of room for personal growth

• 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.

Market Once will accept applications for this role on an ongoing basis.

Market Once 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.