Sr. Mobile Engineer II

The role

You will join the Mobile Engineering team as a Sr. Software Engineer II specializing in Flutter. You will execute mobile architecture, mentor engineers, and deliver scalable cross-platform applications.

What you will do

• Own the life cycle of features through debugging, documenting, testing, releasing, and monitoring
• Attend daily stand-ups and regular team-wide meetings
• Contribute to the technical roadmap for mobile architecture, frameworks, and tooling
• Participate in design reviews, architecture discussions, and performance optimization efforts
• Implement robust, maintainable Flutter solutions
• Collaborate with Product and Design teams to improve user experience
• Investigate issues, mitigate them, and recommend preventative measures
• Improve observability, monitoring, and crash analytics
• Foster a culture of technical excellence, innovation, and collaboration

Required 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
• Understanding of RESTful APIs, WebSockets, and offline data handling
• Familiarity optimizing performance, reliability, and user experience across diverse devices
• Ability to perform in a team environment adopting agile principles
• Strong written and verbal communication skills
• Strong grasp of OOP design principles

Nice to have

• Knowledge of native iOS (Swift) and Android (Kotlin/Java) integration
• Experience with fintech or trading platforms
• Contributions to open-source frameworks or SDKs

Benefits

• 401K plan with company match up to 3.5%
• Annual paid time off allowance accrues at a rate of 18 days per year
• Seven paid holidays
• Generous PTO
• 5 Conditional Holidays Annually
• 1 Service Day Annually
• Paid Parental Bonding Leave
• Health, Vision, Dental Coverage
• Life and Disability Insurance Covered 100% by NinjaTrader

About the company

NinjaTrader is an industry-leading trading platform and futures broker. Since 2003, it has grown to over 2 million users.