Senior React Native Developer

We are looking for an experienced developer to provide final polishing and ongoing maintenance for the mobile app — a cross-platform application for advanced wearable ring technology.

This is a project-based role focused on getting the app launch-ready, with excellent opportunity for long-term hourly-rate collaboration on maintenance, bug fixes, and new feature development.

Tech Stack

• Frontend: React Native (primary) + custom native modules in Kotlin (Android) and Swift (iOS)

• Backend: Firebase (Firestore + Authentication) for user profiles and wearable (ring) data

   

What You’ll Do

• Take full ownership of the final polishing phase of the cross-platform React Native app
• Complete all remaining UI/UX refinements, performance optimizations, and bug fixes to deliver a premium, smooth user experience
• Develop and maintain custom native modules in Kotlin and Swift for advanced ring functionality (NFC interactions, token management, device pairing, etc.)
• Ensure seamless data synchronization and flow with Firebase
• Support post-launch maintenance, updates, and implementation of new features as needed
• Deliver outstanding reliability, performance, and user experience across both iOS and Android

Requirements

• 3+ years of hands-on React Native experience
• Strong proficiency writing and maintaining custom native code in Kotlin (Android) and Swift (iOS)
• Solid experience with Firebase (Firestore, Authentication, and related services)
• Experience with wearable devices, NFC hardware integrations, or payment-related features is a big plus
• Ability to work independently, deliver clean and maintainable code, and communicate progress clearly

Contract Details

• Project-based with milestone payments for final delivery
• Competitive hourly rate for ongoing maintenance, updates, and additional features
• Fully remote
• Long-term collaboration possible if the partnership works well