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Our client is looking for a Mobile Lead Engineer for a project focused on a cross-platform React Native app (iOS and Android) that discovers, pairs with, and controls BLE hardware.Native module integration: wiring a vendor-supplied Bluetooth SDK into React Native and handling the bridge cleanlyCross-platform BLE identifier handling, where iOS exposes a per-pairing UUID and Android exposes the MAC address directlyLock and unlock flows with hard timing constraints (sub-second response, short connection and validation windows)Over-the-air firmware updates to connected devicesOffline-first behavior: a pending-action queue that syncs when the device reconnectsSecure credential storage (iOS Keychain, Android Keystore), biometric auth, NFC, and QR-based device registrationReal-time device status: battery, firmware version, connectivity stateMust-haves:Strong production React Native experience, with apps you've shipped to the App Store and Google PlayComfort writing or integrating native modules (Swift/Kotlin) when the JavaScript layer isn't enoughSolid grasp of mobile state management, async flows, and the realities of debugging on physical devices rather than simulatorsThe instinct to handle edge cases and failure states up front, not after QA finds themFluent English and availability during US Eastern business hoursBig pluses:These aren't required, but they move a candidate to the top of the list:Bluetooth Low Energy (BLE) experience. Direct, hands-on work with BLE in a mobile app. If you've fought with connection timeouts, GATT services, pairing quirks, or platform identifier differences, say so.IoT apps in your portfolio. Apps that control or communicate with physical hardware. Tell us what the device was and what your app did with it.B2B / enterprise app experience over consumer apps. We'd rather see a multi-tenant admin tool, a field-operations app, or a hardware companion app than a high-polish consumer social app. The user base here is organizations and operators, not the mass market.
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