Senior Mobile Engineer

NinjaTrader

. Lead mobile architecture and influence technical direction across teams .

Posted 10/8/2026full-timeUnited StatesSenior💰 $125,000 - $175,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in mobile architecture and Flutter development, with a strong focus on mentoring, technical direction, and improving user experience. Proficient in implementing testing strategies and optimizing performance across iOS and Android platforms.

Highest-signal resume keywords

Flutter DevelopmentDart ProgrammingMobile ArchitectureCI/CD AutomationOOP Design Principles

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Applicant Tracking System Keywords

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Hard Skills

Flutter DevelopmentDart ProgrammingMobile ArchitectureState ManagementTesting StrategiesRESTful APIsWebSocketsPerformance OptimizationOOP Design PrinciplesNative iOS Integration

Soft Skills

MentoringCollaborationCommunication

Tools & Technologies

CI/CD AutomationCrash AnalyticsAgile Principles

Industry Keywords

FintechTrading PlatformsOpen-Source Contributions

Tech Stack

Tools & technologies

AndroidDartFlutteriOSJavaKotlinSwift

About the role

Key responsibilities & impact

Lead mobile architecture and influence technical direction across teams
Mentor engineers and promote engineering excellence
Own feature lifecycles through debugging, documenting, testing, releasing, and monitoring
Participate in 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 across iOS and Android
Implement maintainable Flutter solutions using state management, dependency injection, and reactive programming best practices
Collaborate with Product and Design to improve mobile user experience
Investigate issues, mitigate them, and recommend preventative measures
Improve observability, monitoring, and crash analytics for product stability and quality
Foster technical excellence, innovation, and collaboration

Requirements

What you’ll need

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

Comp & perks

Annual target bonus of 12%
401K plan with company match up to 3.5% of employee contributions
18 days of annual paid time off (some positions may qualify for more)
7 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
Paid parental bonding leave
Health, vision, dental coverage
Life and disability insurance covered 100% by NinjaTrader