Senior React Native Mobile Developer – Embedded & BLE

About the role

LVJ Soft is seeking a Senior Mobile Software Engineer to design and deliver production‑grade React Native applications that communicate with embedded IoT devices via Bluetooth Low Energy. You will work closely with backend and firmware teams to create reliable, scalable mobile solutions for ESP32 and Nordic (nRF52/nRF53) hardware.

Key responsibilities

• Develop and maintain cross‑platform React Native apps for iOS and Android.
• Integrate mobile applications with REST APIs and cloud services (e.g., AWS).
• Implement, test, and maintain BLE communication, including device discovery, pairing, connection management, and GATT services.
• Collaborate with firmware and backend engineers to define and refine communication protocols.
• Optimize app performance, battery consumption, and BLE reliability.
• Conduct code reviews, contribute to architecture decisions, and manage App Store and Google Play releases.

Required profile

• 6+ years of professional mobile development experience.
• 4+ years of hands‑on React Native development.
• Proven track record publishing and maintaining iOS and Android applications.
• Strong experience with Bluetooth Low Energy and BLE devices such as ESP32 or Nordic chips.
• Solid understanding of GATT services and characteristics.
• Experience integrating RESTful APIs and working with cloud platforms.

Required skills

• React Native
• iOS & Android development
• Bluetooth Low Energy (BLE)
• ESP32, Nordic nRF52, Nordic nRF53
• GATT Services & Characteristics
• REST API integration
• AWS or other cloud services
• State management (Redux, Zustand, MobX)
• App Store & Google Play publishing
• Swift or Kotlin (nice to have)
• OTA firmware updates (nice to have)
• FreeRTOS, Zephyr (nice to have)
• BLE security & encryption (nice to have)
• Low‑power BLE optimization (nice to have)