Senior React Native Engineer – Fintech Mobile Apps

Sterling Trading Tech; Chicago (IL); On-site; USD 120,000 - 160,000; Full time

Job summary

Sterling Trading Tech seeks a Sr React Native Developer to build and maintain secure, high-performance mobile apps for iOS and Android. You’ll collaborate with product managers, designers, and backend engineers to deliver a clear user experience and reliable performance.

You will implement reusable components, integrate APIs and WebSocket connections, and ensure robust state management with attention to security and accessibility standards. Join a growing fintech team shaping trading technology.

Qualifications

• Three or more years of professional software development experience, with hands-on React Native.
• Strong understanding of React hooks, lifecycles, and state management.
• Experience integrating APIs and handling asynchronous operations.
• Familiarity with iOS/Android tooling, build processes, and platform differences.
• Experience with Git, code reviews, automated testing, and CI/CD pipelines.
• Understanding of mobile security, accessibility, and performance optimization.
• Strong troubleshooting, communication, and collaboration skills.

Responsibilities

• Develop and maintain mobile applications using React Native and TypeScript.
• Build reusable components and implement designs across screen sizes and devices.
• Integrate REST APIs, WebSocket connections, and authentication services.
• Manage application state, data synchronization, loading states, and error handling.
• Optimize startup, rendering, memory usage, and network performance.
• Implement secure sign-in, token storage, biometric authentication, and session management.
• Write automated tests and participate in code reviews.
• Troubleshoot production issues using logs, crash reports, and performance monitoring.
• Support builds, releases, and submissions to Apple App Store and Google Play.
• Collaborate on technical design, estimates, and development standards.

Skills

React Native

TypeScript

API integration

Git & CI/CD

Mobile security

Performance optimization

Tools

Expo

Kubernetes

Docker

Linux

AWS/Azure

Job description

Sterling Trading Tech seeks a Sr React Native Developer to build and maintain secure, high-performance mobile apps for iOS and Android. You’ll collaborate with product managers, designers, and backend engineers to deliver a clear user experience and reliable performance.

You will implement reusable components, integrate APIs and WebSocket connections, and ensure robust state management with attention to security and accessibility standards. Join a growing fintech team shaping trading technology.