Sr. Software Test Engineer, Mobile

Responsibilities

• In this role you will:
• 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, WebdriverIO, 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 TypeScript/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 NinjaTrader SDLC and information security standards

Requirements

• 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, WebdriverIO, or comparable mobile automation tools
• Demonstrated experience working with mobile engineers on testability-by-design
• Deep understanding of Screen/Page Object Model or equivalent patterns for mobile test architecture
• Strong proficiency in TypeScript or JavaScript
• Experience with CI/CD tooling for mobile delivery, including GitHub Actions
• Experience designing test strategies that integrate into automated pipelines at scale
• Proven proficiency with AI-assisted engineering tools applied responsibly in a mobile QA context
• Track record of improving automation stability and reducing flakiness
• Strong communication and collaboration skills - comfortable as a peer to Flutter engineers and product managers
• Bonus points for:
• Hands-on experience with Flutter-native testing tools (flutter_test, integration_test package)
• Familiarity with iOS and Android internals, simulators, and emulators
• Experience with cloud device

Benefits

Additional Information

Disclaimer: Please be advised that the most accurate and up-to-date information about our open roles-including job descriptions, compensation, and benefits-can only be guaranteed on our official job board. For the latest listings and details, please visit: https://job-boards.greenhouse.io/ninjatrader . JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD Welcome to the dynamic world of NinjaTrader! 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, NinjaTrader 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, NinjaTrader 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 NinjaTrader? 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.

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