We are building a next-generation mobile application that connects seamlessly with an existing IoT device via Bluetooth Low Energy (BLE) and synchronizes user data with a cloud backend.
The system consists of three components:

• A lightweight backend (similar to Firestore/Supabase)
• An existing IoT device using BLE
• A cross-platform mobile app (Android + iOS) — the primary development focus

We are looking for an experienced Mobile App Developer with strong expertise in BLE communication and cross-platform mobile development. The ideal candidate will lead the development of the mobile app, integrate BLE workflows, and ensure reliable communication with the backend system.

Responsibilities
Mobile App Development

• Build a production-ready mobile app for iOS and Android (React Native preferred; open to Flutter or native if strongly justified)
• Implement smooth UI/UX, state management, offline sync, and background operations
• Develop secure authentication and user flows

BLE / IoT Integration

• Integrate the app with an existing BLE-based IoT device
• Implement device discovery, pairing, data exchange, firmware communication, and reconnection logic
• Handle BLE performance, latency, and error recovery

Backend Synchronization

• Connect the mobile app with a minimal backend (Firestore/Supabase-style)
• Design and implement robust syncing, caching, and conflict resolution
• Ensure secure communication and data integrity

Collaboration / System Design

• Work closely with hardware engineers, backend developers, and product designers
• Participate in architecture discussions and technical decision-making
• Produce clear documentation for BLE workflows and app subsystems

Required Qualifications

• 3+ years experience in mobile app development (React Native preferred)
• Strong experience working with BLE on mobile (scan, connect, services, characteristics, notifications)
• Experience building apps that interact with hardware/IoT devices
• Solid understanding of mobile app architecture, state management, and performance optimization
• Comfort working with backend APIs, databases, and cloud services
• Ability to write clean, maintainable, well-tested code

Bonus / Nice-to-Have

• Experience with Flutter, Swift, Kotlin, or native BLE APIs
• Familiarity with Firestore, Supabase, or similar cloud backends
• Understanding of IoT communication protocols and embedded systems
• Experience with OTA firmware updates via mobile
• UI/UX awareness and ability to contribute to app flows

What We Offer

• Opportunity to build a high-impact product from the ground up
• Flexible working environment
• Collaboration with a small, highly skilled cross-functional team
• Competitive compensation
• Long-term project potential