Senior Mobile Engineer I: Flutter & Architecture Lead

NinjaTrader; Chicago (IL); Hybrid; USD 125,000 - 175,000; Full time

Benefits offered by this job

Generous PTO

Paid holidays

Company 401k match

Parental leave

Health coverage

Vision coverage

Dental coverage

Life Insurance

Disability insurance

Job summary

NinjaTrader is seeking an experienced Sr. Mobile Engineer I to lead mobile architecture and deliver scalable Flutter-based apps. You will mentor engineers, shape technical direction, and ensure end-to-end quality for iOS and Android platforms.

Join a dynamic team in a hybrid Chicago-based role, driving innovation, performance, and a strong mobile product experience for millions of traders.

Qualifications

• 6+ years of professional software engineering experience.
• 2+ 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.

Responsibilities

• Own the life cycle of features through debugging, documenting, testing, releasing, and monitoring.
• Take part in daily stand-ups and regular team-wide meetings to discuss current and upcoming tasks.
• Participate in 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.
• Improve observability, monitoring, and crash analytics to ensure product stability and quality.

Skills

Software engineering

Flutter

Dart

Mobile development

CI/CD

REST APIs

Tools

Flutter framework

Dart language

iOS

Android

BLoC

Job description

NinjaTrader is seeking an experienced Sr. Mobile Engineer I to lead mobile architecture and deliver scalable Flutter-based apps. You will mentor engineers, shape technical direction, and ensure end-to-end quality for iOS and Android platforms.

Join a dynamic team in a hybrid Chicago-based role, driving innovation, performance, and a strong mobile product experience for millions of traders.