React Native Developer for Fitness Tracking App

We're a health tech startup launching a cross-platform fitness tracking mobile application that helps users monitor workouts, track nutrition, and achieve their wellness goals. We need an experienced React Native Developer to build this app from the ground up with a focus on performance, user experience, and seamless integration with health APIs like Apple HealthKit and Google Fit.

You'll be working closely with our UI/UX designer and backend developer to bring our vision to life. The app will include features like workout logging, progress tracking, social sharing, push notifications, and personalized fitness recommendations. We're looking for someone who can write clean, maintainable code and deliver a polished product that works flawlessly on both iOS and Android devices.

This is a 2-3 month project with potential for ongoing maintenance and feature additions. We value clear communication, proactive problem-solving, and developers who take ownership of their work. If you're passionate about health tech and have a strong portfolio of React Native apps, we'd love to hear from you.

Key Responsibilities

Develop cross-platform mobile app using React Native for iOS and Android

Integrate with Apple HealthKit and Google Fit APIs for health data sync

Implement Firebase for authentication, database, and push notifications

Build real-time workout tracking with GPS and timer functionality

Create intuitive UI components following provided Figma designs

Implement state management using Redux or Context API

Optimize app performance and reduce bundle size

Write unit tests and conduct thorough testing on both platforms

Deploy apps to App Store and Google Play Store

Provide documentation and code comments for future maintenance

Required Skills

React Native

JavaScript (ES6+)

TypeScript

Redux / Context API

Firebase (Auth, Firestore, Cloud Messaging)

REST API Integration

iOS Development (Xcode)

Android Development (Android Studio)

Git Version Control

UI/UX Implementation

Mobile App Testing

App Store Deployment

Google Play Deployment

Tools

React Native CLI or Expo

Visual Studio Code

Xcode (for iOS builds)

Android Studio (for Android builds)

Firebase Console

Postman (API testing)

Git/GitHub

Figma (design handoff)

TestFlight (iOS beta testing)

Slack (team communication)

Deliverables

Fully functional React Native app for iOS and Android

User authentication and profile management system

Workout tracking module with timer and GPS

Nutrition logging and calorie tracking feature

Progress dashboard with charts and statistics

Social features (friends, sharing, challenges)

Push notification system for reminders

Integration with Apple HealthKit and Google Fit

App Store and Google Play Store listings (published)

Complete source code with documentation

30 days of post-launch bug fixes and support