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NarsingShivakumar/README.md

Hi, I'm Shivakumar Narsing

React Native Developer · Healthcare IoT (BLE/USB) · WebRTC · Offline-First Apps

Building reliable mobile experiences for Android and iOS.

📍 Hyderabad, India · 💼 Open to opportunities

LinkedIn GitHub Email


About Me

I'm a React Native developer who builds production healthcare and financial-services apps that stay fast and dependable, even with limited connectivity.

My work includes BLE and USB medical-device integration through custom Android native modules, WebRTC teleconsultation, and offline-first data sync.

  • 📱 Build cross-platform apps with React Native and TypeScript
  • 📡 Integrate medical devices over BLE and USB (ECG, SpO2, BP monitors, glucometers)
  • 🎥 Build WebRTC video consultations with Socket.IO signaling
  • 🗄️ Design offline-first sync with WatermelonDB, SQLite and retry queues
  • 🔐 Work with biometric authentication, OCR and face recognition

Core Expertise

Mobile Engineering Data and Connectivity Integrations
React Native · TypeScript WatermelonDB · SQLite BLE · USB · Device SDKs
Android (Java, Kotlin) · iOS build and release Redux Toolkit · RTK Query WebRTC · Socket.IO
Native Modules · Bridging Offline sync · NetInfo OCR · Face Recognition · FCM

Also worked with: JavaScript, React, Node.js, MongoDB, Firebase.

Selected Work

Summaries of employer projects. Source code is private.

📡 Healthcare Telemedicine Platform

React Native · BLE · USB · WebRTC · Android Native Modules

  • Integrated 10+ medical devices (ECG, SpO2, BP monitors, glucometers) over BLE, USB and device SDKs.
  • Built real-time patient-doctor video consultations with WebRTC and native bridges for hardware communication.
  • Handled device connection, data streaming, parsing and Android runtime permissions.

🗄️ Offline-First Mobile Application

React Native · WatermelonDB · SQLite · NetInfo

  • Designed local-first data flows so key workflows work without a network connection.
  • Implemented reactive data updates, background synchronization and retry queues.

💳 Financial Services and Security Apps

React Native · Payment Gateways · OCR · Biometrics

  • Built loan workflows, EMI and payment screens, and KYC/document capture.
  • Built an OTP authenticator with biometric access and time-based OTP generation.

Let's Connect

📩 Email me · 💼 LinkedIn


Thanks for visiting my profile!

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