[Remote] Mobile Lead Engineer (React Native) - US-based

Note The job is a remote job and is open to candidates in USA. Curotec is seeking a Mobile Lead Engineer to work on a cross-platform React Native app that interacts with BLE hardware. The role involves integrating native modules, managing cross-platform BLE identifiers, and ensuring secure credential storage and real-time device status updates. Responsibilities Native module integration wiring a vendor-supplied Bluetooth SDK into React Native and handling the bridge cleanly Cross-platform BLE identifier handling, where iOS exposes a per-pairing UUID and Android exposes the MAC address directly Lock and unlock flows with hard timing constraints (sub-second response, short connection and validation windows) Over-the-air firmware updates to connected devices Offline-first behavior a pending-action queue that syncs when the device reconnects Secure credential storage (iOS Keychain, Android Keystore), biometric auth, NFC, and QR-based device registration Real-time device status battery, firmware version, connectivity state Skills Strong production React Native experience, with apps you've shipped to the App Store and Google Play Comfort writing or integrating native modules (Swift/Kotlin) when the JavaScript layer isn't enough Solid grasp of mobile state management, async flows, and the realities of debugging on physical devices rather than simulators The instinct to handle edge cases and failure states up front, not after QA finds them Fluent English and availability during US Eastern business hours 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 Company Overview Latin American Nearshore Software Development & Staff Augmentation Powerhouse It was founded in 2010, and is headquartered in Philadelphia, Pennsylvania, USA, with a workforce of 51-200 employees. Its website is https//www.curotec.com.

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