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 RESTful APIs and cloud services (e.g., AWS).
• Implement, test, and maintain BLE communication, including device discovery, pairing, connection management, and GATT service handling.
• Collaborate with firmware and backend engineers to define and refine communication protocols.
• Optimize app performance, battery consumption, and BLE reliability.
• Participate in code reviews, architecture decisions, and continuous improvement initiatives.
• Manage App Store and Google Play releases, including versioning and deployment.

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, GATT services, and BLE security.
• Familiarity with ESP32, Nordic nRF52/nRF53 or similar BLE devices.
• Solid understanding of REST API integration and cloud platforms such as AWS.
• Experience with state‑management libraries (Redux, Zustand, MobX) and strong debugging skills.

Required skills

• React Native
• iOS & Android development
• Bluetooth Low Energy (BLE)
• GATT Services & Characteristics
• REST APIs
• AWS (or other cloud platforms)
• Redux / Zustand / MobX
• OTA Firmware Updates (nice to have)
• Swift, Kotlin
• FreeRTOS, Zephyr
• ESP32, Nordic nRF52, Nordic nRF53
• IoT platforms & device provisioning
• BLE security & encryption
• Low‑power BLE optimization