Senior Flutter Mobile Engineer — Real-Time Trading

Moonshot; New York, Northern (NY, KY); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

5% 401(k) match

Health benefits

Life insurance

Home office stipend

Flexible PTO

Job summary

Moonshot, the iOS/Android fintech app branded as the “Robinhood for DeFi,” is seeking a Senior Mobile Engineer to lead the Flutter-based trading experience. You’ll own architecture, design system, and the engineering practices that enable rapid, safe delivery.

You’ll build interactive trading features, improve performance, and mentor teammates while collaborating with Design, Product, and Backend teams. NYC preferred, remote-friendly within NAMER, with travel.

Qualifications

• 6–10+ years of professional mobile development, with 3+ years in Flutter.
• Experience owning large-scale consumer apps end-to-end, ideally fintech/trading.
• Strong understanding of mobile architectures and state management.
• Experience building design systems/UI libraries in Flutter or other frameworks.

Responsibilities

• Own the architecture and long-term evolution of Moonshot’s Flutter app across iOS and Android.
• Design, implement, and maintain a company-wide mobile design system and component library.
• Build highly interactive trading experiences: live prices, charts, order tickets, order history, notifications, and portfolio views.
• Drive mobile performance and reliability: profiling, optimizing frame rendering, memory and networking usage, crash minimization.
• Implement and maintain automated testing (unit, widget, integration) and help define release/QA processes.
• Collaborate with Product and Growth to integrate analytics, A/B testing, feature flags, and event tracking.
• Partner with Backend/Platform engineers on API design, data models, error handling, and resilience.
• Lead by example through code reviews, design docs, and mentorship; participate in on-call rotations.

Skills

Flutter

React Native

Kotlin

Swift

Mobile architectures

Design systems

Testing

CI/CD

Mentoring

On-call rotations

Tools

WebSockets

CI/CD tooling

Job description

Moonshot, the iOS/Android fintech app branded as the “Robinhood for DeFi,” is seeking a Senior Mobile Engineer to lead the Flutter-based trading experience. You’ll own architecture, design system, and the engineering practices that enable rapid, safe delivery.

You’ll build interactive trading features, improve performance, and mentor teammates while collaborating with Design, Product, and Backend teams. NYC preferred, remote-friendly within NAMER, with travel.