Staff Flutter Mobile Engineer — Fintech, Design System Leader

Moonshot; New York (NY); Hybrid; USD 180,000 - 240,000; Full time

Benefits offered by this job

Competitive salary

Meaningful equity

5% 401(k) match

Health benefits

Office stipend

Flexible PTO

Job summary

Moonshot, the Robinhood for DeFi, seeks a Staff Mobile Engineer to own the iOS/AndroidFlutter app architecture, design system, and engineering practices. You’ll ship highly interactive trading experiences and build the foundations (testing, analytics, feature flags) that let the entire team move quickly and safely.

Based in NYC with remote options within NAMER, you’ll mentor teammates, lead code reviews, and drive performance and reliability across mobile platforms.

Qualifications

• 6–10+ years of professional mobile development experience, ideally 3+ years of Flutter in production or otherwise React Native, Kotlin, Swift.
• Experience owning large-scale consumer apps end-to-end, ideally in fintech, trading, or similarly demanding domains.
• Strong understanding of mobile architectures (state management, navigation, modularization) and their tradeoffs.
• Demonstrated experience building or leading design systems / UI libraries in Flutter or other frameworks.
• Solid engineering fundamentals: testing, CI/CD for mobile, monitoring, and release management.
• Strong collaboration skills and experience mentoring other engineers.

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, in close collaboration with Design.
• 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, managing memory/network usage, and minimizing crashes.
• Implement and maintain automated testing (unit, widget, integration) and help define release and QA processes.
• Collaborate with Product and Growth to integrate analytics, A/B testing, feature flags, and event tracking directly into the app.
• Partner with Backend/Platform engineers on API design, data models, error handling, and resilience (retries, fallbacks, offline behaviour).
• Lead by example through code reviews, design docs, and mentorship, raising the bar for mobile excellence.
• Participate in on-call rotations for mobile-related incidents and drive root-cause fixes.

Skills

Flutter

Mobile development

Design systems

Mentoring

Tools

CI/CD for mobile

Testing frameworks

Job description

Moonshot, the Robinhood for DeFi, seeks a Staff Mobile Engineer to own the iOS/AndroidFlutter app architecture, design system, and engineering practices. You’ll ship highly interactive trading experiences and build the foundations (testing, analytics, feature flags) that let the entire team move quickly and safely.

Based in NYC with remote options within NAMER, you’ll mentor teammates, lead code reviews, and drive performance and reliability across mobile platforms.