Sr. Software Engineer in Test I

As a Sr. Software Engineer in Test at NinjaTrader, you own quality end-to-end for a dedicated product squad on our web trading platform. You work alongside developers and product managers to build automation that enables confident, fast shipping. What you test and validate is what traders depend on in real time, on live markets.

What you'll do

• 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 by identifying, analyzing, and eliminating 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 such as code generation, test generation, and 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

What you bring

• 5+ 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 and comfort working as a peer to engineers and product managers

Nice to have

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

What we offer

• Salary range of $82,000-$132,000 USD plus an annual target bonus of 10% (based 50% on individual performance and 50% on company/team performance)
• 401(k) plan with 3.5% company match
• 18 days of annual paid time off plus 7 paid holidays
• Paid parental bonding leave
• Health, vision, and dental coverage
• Life and disability insurance covered 100% by NinjaTrader
• 1 service day annually
• 5 conditional holidays annually
• Hybrid work schedule: in-office Tuesday through Thursday, remote on Mondays and Fridays, plus 20 additional flex remote days annually and 5 company-wide office-optional weeks tied to major holidays

About NinjaTrader

NinjaTrader is an industry-leading trading platform and futures broker serving over 2 million users. Since 2003, the company has been dedicated to empowering traders with award-winning software and brokerage services. NinjaTrader is the number one rated futures brokerage worldwide and continues to modernize the futures industry with cutting-edge products and real-time support.