React Native Developer (IoT / HealthTech) Convertible to Full-Time

About Kasphyn

We are building Kasphyn an EMG + IMU wearable device for serious fitness enthusiasts. The device reads real-time muscle activation data via Bluetooth Low Energy (BLE) and delivers AI-powered coaching through a React Native mobile app.

What You Will Do (End-to-End Ownership)

Build and maintain our React Native (Expo) mobile app screens, navigation, state management, animations

Implement and debug BLE data streaming from our custom hardware device to the app

Work with real-time sensor data (EMG + IMU signals) parsing, filtering, visualization

Integrate with backend auth, real-time database, edge functions

Build data pipelines for our AI coaching layer

Fix bugs across the stack firmware-adjacent issues, app crashes, performance bottlenecks

Ship features fast. We prototype in days, not sprints.

Tech Stack

React Native (Expo) + TypeScript + NativeWind

Zustand (state management)

react-native-ble-plx (Bluetooth LE)

Supabase (PostgreSQL, Auth, Realtime)

react-native-svg, react-native-reanimated

Git + GitHub + Cursor/Claude Code workflows

Compensation: From 30,000.00 per month

Benefits

Flexible schedule

Paid sick time

Work from home

Work Location: In person .