Note: The job is a remote job and is open to candidates in USA. NinjaTrader is an industry-leading trading platform and futures broker that provides software and brokerage services for financial markets. The Sr. Mobile Engineer I will lead mobile architecture, mentor engineers, and build scalable, high-performance Flutter applications across iOS and Android while driving technical direction, quality, and reliability.
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
- Help foster a culture of technical excellence, innovation, and collaboration
Skills
- 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 with 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
- Knowledge of native iOS (Swift) and Android (Kotlin/Java) integration
- Experience with fintech or trading platforms
- Contributions to open-source frameworks or SDKs
Benefits
- Annual target bonus of 12%
- 401K plan through ADP under which the company will match up to 3.5% of employee contributions
- Annual paid time off allowance accrues at a rate of 18 days per year (some positions may qualify for more)
- Seven paid holidays
- 20 additional flex remote days annually
- 5 Company Wide Office-Optional weeks tied to major holidays
- Generous PTO
- 7 Paid Holidays Annually + 5 Conditional Holidays Annually
- 1 Service Day Annually
- 401k with 3.5% Company Match
- Paid Parental Bonding Leave
- Health, Vision, Dental Coverage
- Life and Disability Insurance Covered 100% by NinjaTrader
- For Chicago-based employees, we follow a hybrid work schedule: In-office Tuesday through Thursday, with remote work on Mondays and Fridays.
Company Overview
Company H1B Sponsorship