Mobile Engineer (Flutter)

Harnham; New York (NY); Hybrid; USD 150,000 - 170,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

401(k)

Job summary

A FinTech startup based in New York City is seeking a Senior Mobile Engineer (Flutter) to develop high-performing mobile applications. The role includes optimizing app performance and collaborating with design teams. The position offers a hybrid work model with a salary range of $150,000 - $170,000 plus equity. Ideal candidates will have experience with Flutter and a strong understanding of mobile architecture.

Qualifications

• 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 and reactive programming.

Responsibilities

• Design, develop, and ship features in the Flutter app for iOS and Android.
• Collaborate with design and product teams to create intuitive user experiences.
• Optimize app performance and maintain scalable architecture.

Skills

Mobile development with Flutter

Dart programming

RESTful APIs

UI/UX design systems

Firebase

CI/CD

A/B testing

Education

Bachelor’s degree in Computer Science or related field

Tools

Figma

Next.js

React

AWS (EKS, S3, Lambda, API Gateway)

Job description

Overview

Senior Mobile Engineer (Flutter) at Harnham, New York City. FinTech 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: $150,000.00/yr - $170,000.00/yr + equity.

Responsibilities

• 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

Requirements

• 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

Compensation & Benefits

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

How to Apply

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

Keywords

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

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Engineering and Information Technology

Industries

Financial Services and Engineering Services