Sr. Mobile Engineer II (Flutter)

NinjaTrader; United States; On-site; USD 120,000 - 160,000; Full time

Job summary

NinjaTrader, a leading futures-focused broker, is seeking a Sr. Software Engineer II specializing in Flutter to advance our mobile architecture and deliver cross-platform, high-performance apps.

You will mentor engineers, shape technical direction, and ensure quality across iOS and Android. You'll collaborate with Product and Design to elevate the mobile user experience, own feature lifecycles from design through deployment, and drive reliability with modern Flutter practices and state

Qualifications

• Experience with Flutter and mobile development.
• Ability to design robust mobile architectures and best practices.

Responsibilities

• 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 on mobile platforms
• Investigate issues, mitigate them, and recommend preventative measures

Skills

Flutter

Mobile development

Cross-platform

Architecture leadership

Job description

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.

The team

NinjaTrader is a futures-focused brokerage offering low commissions, award-winning trading platforms, and a suite of customizable tools for active traders. The platform delivers integrated multi-device trading across desktop, web, and mobile, with access to thousands of third-party trading apps and add-ons.

The opportunity

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 products.

In 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 on mobile platforms
• Investigate issues, mitigate them, and recommend preventative measures