Mobile Engineer; Flutter

Overview

Senior Mobile Engineer (Flutter) at Harnham, New York City. Fin Tech startup building a next-generation investment platform enabling real-time discovery and replication of high-performing trading strategies. Hybrid role based in NYC with three in-office days per week. Base pay range: $/yr - $/yr + equity.

• Design, develop, and ship features in the Flutter app for iOS and Android
• Collaborate with design and product teams to create performant, intuitive user experiences
• Optimize app performance and maintain scalable architecture patterns
• Write clean, testable code and participate in code reviews
• Monitor analytics and crash reports to identify and resolve production issues
• Contribute to infrastructure decisions, including CI/CD, testing, and release workflows
• Assist with future web development efforts (Next.js) as needed

• Experience in mobile development with Flutter and Dart
• Proven track record of deploying apps to iOS and Android app stores
• Strong knowledge of mobile architecture, RESTful APIs, and reactive programming
• Familiarity with Figma and modern UI/UX design systems
• Exposure to Next.js and React is a plus
• Experience with Firebase, CI/CD, and A/B testing in production
• AWS experience (EKS, S3, Lambda, API Gateway) preferred
• Startup experience valued; big tech backgrounds less preferred
• Bachelor’s degree in Computer Science or related field preferred

Base salary of $150,000 - $170,000 plus equity. Comprehensive benefits include health, dental, vision, and 401(k).

Please express your interest by submitting your resume via the Apply link on this page.

Mobile Engineering, Flutter, Dart, iOS, Android, Firebase, CI/CD, REST APIs, Fin Tech, Cross-Platform Development, AWS, Next.js, Figma, Startup, A/B Testing, Event-Driven Architecture

Mid-Senior level

Full-time

Engineering and Information Technology

Financial Services and Engineering Services