Staff Software Engineer (Mobile)

NinjaTrader•Chicago, IL

19d•$160,000 - $200,000

About The Position

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