Sr. Software Test Engineer, Web

NinjaTrader • Chicago, IL

3d • $100,000 - $150,000 • Hybrid

About The Position

NinjaTrader's web trading platform is how our customers trade futures — in real time, on live markets. As a Sr. Software Engineer in Test on the Web team, you will own quality for a dedicated product squad, embedded as a peer alongside engineers and product managers. Your job is not to gate releases — it is to build automation that makes confident, fast shipping the default. What you test and validate is what traders depend on.

Requirements

• 7+ years of experience in QA engineering and test automation
• Strong hands-on experience with Playwright
• Solid experience writing automation in TypeScript or JavaScript
• Experience building and maintaining tests using Page Object Model or modular test architecture
• Demonstrated experience working with engineers on testability-by-design — shaping application architecture and API design to support reliable automation
• Experience integrating automated tests into CI/CD pipelines
• Strong understanding of test design principles and the software testing life cycle
• Proven proficiency with AI-assisted engineering tools (e.g., code generation, test generation, debugging assistants) applied responsibly in a production QA context
• Ability to own quality for a product area independently, with minimal oversight
• Strong communication skills — comfortable as a peer to engineers and product managers

Nice To Haves

• Experience testing real-time or data-intensive web applications
• API automation testing experience
• Accessibility testing knowledge (WCAG standards)
• Experience in trading platforms or fintech

Responsibilities

• Own quality end-to-end for an assigned product squad: from test strategy through release confidence
• Partner with developers and product managers at the design stage to define acceptance criteria and build testability into features from the start
• Design, develop, and maintain Playwright-based automated tests following Page Object Model (POM) patterns and the team's established automation architecture
• Write and maintain automation in TypeScript/JavaScript, contributing to shared frameworks and raising coverage standards across the team
• Collaborate with engineers on system design, API contracts, and application architecture to ensure observable, testable behavior
• Own your squad's test reliability — identify, analyze, and eliminate flakiness with the same urgency as a production bug
• Integrate tests into CI/CD pipelines using tagging strategies (e.g., smoke, regression) so every deployment ships with clear quality gates
• Apply AI-assisted development tools — code generation, test generation, failure analysis — to improve coverage and productivity
• Perform manual and exploratory testing where it adds signal that automation cannot, and convert findings into durable automated coverage
• Contribute to junior QA team members' growth through code reviews, pairing, and direct feedback
• Uphold NinjaTrader SDLC and information security standards

Benefits

• NinjaTrader offers a 401K plan through ADP under which the company will match up to 3.5% of employee contributions.
• Annual paid time off allowance accrues at a rate of 18 days per year (some positions may qualify for more) plus seven paid holidays.
• Generous PTO
• 7 Paid Holidays Annually + 5 Conditional Holidays Annually
• 1 Service Day Annually
• 401k with 3.5% Company Match
• Paid Parental Bonding Leave
• Health, Vision, Dental Coverage
• Life and Disability Insurance Covered 100% by NinjaTrader

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 101-250 employees