Staff Software Engineer (Mobile)

NinjaTrader•Chicago, IL

20d•$160,000 - $200,000

About The Position

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. We are seeking a highly skilled and experienced Staff Engineer (Mobile) specializing in Flutter to join our Mobile Engineering Team. As a Staff Engineer, you will lead mobile architecture, mentor engineers, and deliver scalable, high-performance applications that power a seamless cross-platform experience. You will influence technical direction across teams, set a high standard for engineering excellence, and drive end-to-end quality and reliability in our mobile products.

Requirements

10+ years of professional software engineering experience
3+ years in a technical leadership or staff-level role leading mobile development at scale
4+ years of hands-on Flutter and Dart experience in production environments
Deep understanding of mobile architecture, state management, and design patterns (BLoC, MVVM, Clean Architecture)
Experience architecting and maintaining robust testing strategies for Flutter applications, spanning unit, widget, integration, and end-to-end levels
Experience building CI/CD automation for mobile delivery
Strong understanding of RESTful APIs, WebSockets, and offline data handling
Proven success optimizing performance, reliability, and user experience across diverse devices
Excellent communication skills and ability to influence technical direction across cross-functional teams

Nice To Haves

Experience creating custom Render Objects in Flutter to support advanced layouts or charting
Strong knowledge of native iOS (Swift) and Android (Kotlin/Java) integration
Experience with fintech or trading platforms
Contributions to open-source Flutter frameworks or SDKs
Experience leading migration from native mobile stacks to Flutter

Responsibilities

Define and drive the technical roadmap for mobile architecture, frameworks, and tooling
Architect robust, maintainable Flutter solutions and guide best practices for state management, dependency injection, and reactive programming
Lead design reviews, architecture discussions, and performance optimization efforts across iOS and Android
Collaborate with product, design, and backend teams to deliver cohesive, high-quality user experiences
Partner with backend and API teams to ensure efficient data integration and scalable mobile communication patterns
Establish and evolve testing, CI/CD, and release processes to improve developer productivity and delivery reliability
Drive observability, monitoring, and crash analytics to ensure product stability and quality
Mentor engineers across teams and foster a culture of technical excellence, innovation, and collaboration
Continuously evaluate and introduce emerging technologies that enhance performance, security, and developer efficiency