NinjaTrader - Sr. Software Engineer II, Mobile
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 (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 • Knowledge of native iOS (Swift) and Android (Kotlin/Java) integration • Experience with fintech or trading platforms • Contributions to open-source frameworks or SDKs
Responsibilities
• We are seeking a highly skilled and experienced Engineer specializing in Flutter to join our Mobile Engineering Team. As a Sr. Mobile Engineer II, 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. • Own the life cycle of features through testing, debugging, documenting, releasing, and monitoring • Take part in daily standups 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
Benefits
• The salary range for this role will be $150,000.00 - $200,000.00 USD. In addition, this position will also receive an annual target bonus of 12%. Bonus pay at NinjaTrader is based on individual performance (50%) as well as company/team performance (50%). • Salary and bonus earnings are only two components of the total compensation package offered by NinjaTrader. NinjaTrader offers a 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) plus seven paid holidays. • Location: • This role is based in Chicago, IL. *There may be remote flexibility for exceptional candidates in the following states: California, Colorado, Florida, Georgia, Illinois, Indiana, Minnesota, Missouri, Montana, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Washington DC, Wisconsin. • Hybrid: • For Chicago-based employees, we follow a hybrid work schedule: In-office Tuesday through Thursday, with remote work on Mondays and Fridays. In addition to these weekly remote days, we offer: • 20 additional flex remote days annually • 5 Company Wide Office-Optional weeks tied to major holidays • 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 • We are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender, gender identity or expression, or veteran status. We are proud to be an equal opportunity workplace.
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