Staff Flutter Mobile Engineer for Fintech Trading Platform

The Bitcoin Street Journal; New York, Northern (NY, KY); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

5% 401(k) match

Health benefits with employer-covered

Life insurance coverage

One-time office setup stipend

Flexible PTO

Job summary

Ideal candidates have 6–10+ years in mobile, 3+ years in Flutter, and a background in fintech or high-skill consumer apps with strong collaboration and mentoring abilities. Remote-friendly within NAMER, with NYC preference.

Qualifications

• 6–10+ years of professional mobile development experience.
• 3+ years of Flutter in production (or React Native).
• Experience with large-scale consumer apps in fintech/trading.
• Strong mobile architectures knowledge and tradeoffs.
• Experience building/designing mobile design systems/UI libraries.
• Solid testing, CI/CD, monitoring and release management.

Responsibilities

• Own the architecture and long-term evolution of Moonshot’s Flutter app for iOS and Android.
• Design and maintain a company-wide mobile design system and component library with Design.
• Build highly interactive trading experiences: live prices, charts, tickets, history, notifications, portfolio.
• Drive mobile performance: profiling, memory and networking optimizations, crash reduction.
• Implement/maintain automated tests and help define release/QA processes.
• Collaborate with Product/Growth to integrate analytics, A/B testing, feature flags, event tracking.
• Partner with Backend to optimize API design, data models, error handling, resilience.
• Lead by example: code reviews, design docs, mentorship, raise mobile excellence.
• Participate in on-call rotations and drive root-cause fixes.

Skills

Mobile development

Design systems

Mentoring

Testing

CI/CD

On-call rotations

Code reviews

Tools

Flutter

React Native

Kotlin

Swift

Job description

Ideal candidates have 6–10+ years in mobile, 3+ years in Flutter, and a background in fintech or high-skill consumer apps with strong collaboration and mentoring abilities. Remote-friendly within NAMER, with NYC preference.