Sr. Software Test Engineer, Mobile

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Welcome to the dynamic world of Ninja Trader! As an industry-leading trading platform and futures broker, we’re empowering traders to take control of their financial destiny. How do we do it? We provide cutting‑edge products and services that enhance the trading journey. Whether a seasoned pro or just starting out, Ninja Trader equips traders with award‑winning software and brokerage services to navigate the world’s leading financial markets with confidence.

Our growth story is nothing short of exhilarating. Since 2003, Ninja Trader has been dedicated to understanding and supporting traders on their journey toward trading triumph. Through those efforts, our user base has grown to over 2 million users and we have become the number one rated futures brokerage worldwide.

But we’re not stopping there. We’re constantly evolving, pushing boundaries, and modernizing the futures industry. Our commitment to innovation means users will always have access to dynamic tools, real‑time support, and a community of like‑minded traders.

So, why work at Ninja Trader? Here, you’re not just part of a team; you’re part of a movement. We empower employees to reach new heights in their careers by providing a dynamic culture focused on social connection, professional development, and employee recognition initiatives. Sounds too good to be true? Take it from our employees.

Join us as we redefine what’s possible in trading, advocate for our customers, and continue our journey toward becoming the world’s top retail‑focused trading platform in the world.

Mobile is central to how Ninja Trader reaches the next generation of retail traders. Our Flutter‑based platform runs on iOS and Android, and the bar for quality is high — traders make real financial decisions on it. As a Sr. Software Engineer in Test on the Mobile team, you will own automation and quality for our mobile applications, working as a peer to Flutter engineers and product managers.

You will shape how our apps are built to be testable, not just verify what ships.

• Architect, build, and maintain a scalable end‑to‑end mobile automation framework for our Flutter‑based iOS and Android applications
• Lead automation efforts across both platforms, with a focus on long‑term framework stability and coverage
• Implement and enhance mobile automation using Appium, Webdriver
  
  IO, or similar automation frameworks
• Design and enforce a Screen/Page Object Model architecture and project structure that scales with the mobile team
• Write maintainable automation code in Type Script/JavaScript, establishing standards others build on
• Partner with Flutter engineers on application architecture to identify testability gaps and make automation‑friendly design decisions early — before they become late‑stage problems
• Own CI/CD integration for mobile test pipelines: tagging strategies (e.g., smoke, regression), automated reporting, and pipeline reliability
• Identify, analyze, and eliminate test flakiness — treating automation reliability as a product quality concern
• Apply AI‑assisted development tools — code generation, test generation, failure analysis — to improve coverage and productivity
• Drive improvement in mobile testing tooling and documentation
• Contribute to junior QA team members' growth through code reviews, pairing, and direct feedback
• Uphold Ninja Trader SDLC and information security standards

• 7+ years of experience in QA engineering and test automation, with significant mobile automation experience
• Proven experience building and scaling mobile E2E automation frameworks for iOS and Android
• Strong hands‑on experience with Appium, Webdriver
  
  IO, or comparable mobile automation tools
• Demonstrated experience working with mobile engineers on testability‑by‑design
• Deep understanding of…