Sr. Mobile Engineer II

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: .JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD 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.  What you'll do:

Join our Mobile Engineering team as a Sr. Software Engineer II specializing in Flutter. You will champion the execution of our mobile architecture, mentor engineers, and deliver scalable, high-performance applications that provide a seamless cross-platform experience. You will also shape technical direction across teams, set a high standard for engineering excellence, and drive quality and reliability across our mobile  this role you will:

Own the life cycle of features through debugging, documenting, testing, releasing, and monitoring

Attend daily stand-ups and regular team-wide meetings to discuss current and upcoming tasks

Contribute to the technical roadmap for mobile architecture, frameworks, and tooling

Participate in design reviews, architecture discussions, and performance optimization efforts across iOS and Android Implement robust, maintainable Flutter solutions that follow best practices for state management, dependency injection, and reactive programming

Collaborate with Product and Design teams to iteratively improve the user experience oncmobile platforms

Investigate issues, mitigate them, and recommend preventative measures

Improve observability, monitoring, and crash analytics to ensure product stability and quality

Foster a culture of technical excellence, innovation, and collaboration

What you'll need:6+ years of professional software engineering experience2+ years of hands-on Flutter and Dart experience in production environments

Understanding of mobile architecture, state management, and design patterns (e.g. BLoC, MVVM, Clean Architecture)
Experience maintaining testing strategies for Flutter applications, spanning unit, widget, integration, and end-to-end levels

Familiarity with building CI/CD automation for mobile delivery

Understanding of RESTful APIs, Web Sockets, and offline data handling

Familiarity…