Senior React.js & React Native Developer

Job Title

Senior React.js & React Native Developer

Experience

Minimum 5+ years of hands-on experience in frontend and mobile application development

Job Summary

We are seeking a Senior React.js & React Native Developer with strong expertise in building scalable web and mobile applications, real-time communication using WebSockets, and data visualization using charting libraries. The ideal candidate should be comfortable working across React.js, React Native, native Android/iOS modules, and complex state management scenarios.

Key Responsibilities

• Develop and maintain web applications using React.js
• Build and maintain cross-platform mobile applications using React Native
• Create and integrate custom native Android/iOS modules (Java/Kotlin, Swift/Objective-C)
• Implement real-time features using WebSockets / Socket.IO
• Build interactive charts and data visualizations for dashboards and analytics
• Handle high-frequency real-time data updates (charts, live feeds, streaming data)
• Manage complex state management for async and real-time data flows
• Optimize performance for rendering charts, animations, and large datasets
• Integrate backend services via REST APIs, GraphQL, and WebSockets
• Handle application lifecycle events, permissions, and background tasks
• Perform code reviews and contribute to architecture and technical decisions
• Debug and resolve production issues across web and mobile platforms

Required Skills & Qualifications

Core Skills

• 5+ years of experience with JavaScript (ES6+) and TypeScript
• Strong expertise in React.js (hooks, performance optimization, component architecture)
• Strong hands-on experience with React Native (Android & iOS)
• Experience developing custom native modules and bridging them with React Native
• Solid knowledge of state management (Redux, Redux Toolkit, Zustand, MobX, Context API)
• Hands-on experience with WebSockets / Socket.IO
• Experience with charting and data visualization libraries

Charting & Visualization

• Web: Chart.js, Recharts, D3.js, ApexCharts, ECharts (any)
• Mobile: react-native-svg, Victory Native, Reanimated-based charts, Skia-based charts
• Ability to handle real-time chart updates, zooming, scaling, and large datasets
• Understanding of performance optimization for chart rendering

Mobile & Native

• Android: Java / Kotlin, Android SDK, Gradle
• iOS: Swift / Objective-C, Xcode, CocoaPods
• Debugging using Android Studio and Xcode

Networking & Data

• REST APIs, GraphQL, WebSockets
• Handling reconnect logic, offline scenarios, and network failures

Good to Have

• Experience with Expo (bare workflow)
• Familiarity with IoT, health data, financial or real-time monitoring systems
• Experience with CI/CD pipelines (Fastlane, GitHub Actions, Bitrise)
• Experience publishing apps to Google Play Store and Apple App Store
• Knowledge of monorepo and modular architectures

Soft Skills

• Strong analytical and problem-solving skills
• Ability to work independently and take ownership
• Experience mentoring junior developers
• Good communication and collaboration skills