Sr. Mobile Engineer II

Responsibilities

• Own the full feature lifecycle, including debugging, documentation, testing, release, and monitoring.
• Implement maintainable Flutter solutions using state management, dependency injection, and reactive programming practices.
• Contribute to mobile architecture, frameworks, tooling, technical roadmaps, design reviews, and performance optimization.
• Maintain testing strategies spanning unit, widget, integration, and end-to-end testing.
• Improve observability, monitoring, crash analytics, product stability, and reliability across mobile products.
• Mentor engineers and foster technical excellence, innovation, and collaboration.
• Collaborate with Product and Design teams to improve the mobile user experience.
• Investigate issues, mitigate them, and recommend preventative measures.

Requirements

• 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 such as BLoC, MVVM, and Clean Architecture.
• Experience with Flutter application testing across unit, widget, integration, and end-to-end levels.
• Familiarity with mobile CI/CD automation, RESTful APIs, WebSockets, and offline data handling.
• Experience optimizing performance, reliability, and user experience across diverse devices.
• Strong understanding of object-oriented programming design principles.
• Strong written and verbal communication skills and ability to work in a team environment.
• Knowledge of native iOS with Swift and Android with Kotlin or Java is preferred.
• Fintech or trading-platform experience and open-source framework or SDK contributions are preferred.

Benefits

• Chicago-based hybrid schedule with in-office work Tuesday through Thursday and remote work Monday and Friday.
• Remote flexibility may be available for exceptional candidates in specified states.
• 20 additional flex remote days annually and five company-wide office-optional weeks tied to major holidays.
• 18 days of annual paid time off, seven paid holidays, five conditional holidays, and one service day.
• 401(k) plan through ADP with up to a 3.5% company match.
• Paid parental bonding leave.
• Health, vision, dental, life, and disability insurance, with life and disability coverage paid 100% by NinjaTrader.
• Annual target bonus of 12%.