Joe B.

I build, fix, and rescue mobile apps that talk to hardware: Bluetooth Low Energy (BLE), classic Bluetooth, Wi-Fi Direct. and IoT devices, where reliability and real-time behavior matter. I’m often brought in when a connected-device integration isn’t working: dropped connections, flaky pairing, data that doesn’t sync, or an app that won’t make it through App Store / Play Store review. I’ve been the troubleshooter on BLE interfaces for lighting, health, fitness, and automotive devices. This includes stepping into existing React Native, Flutter, and native iOS and Android apps to: • diagnose and fix BLE and device-communication issues • resolve bugs, crashes, and stability problems • upgrade framework versions and fix build/deployment problems • get apps through store submission Selected work: • Chief developer on a BLE-sensor app suite for a major children’s hospital, which helped hundreds of children follow their brace-wearing prescriptions • Re-architected the mobile apps, website, and backend for a major pediatric healthcare initiative • Built a HIPAA-compliant emergency messaging app from scratch in two months • Led a federally mandated Electronic Logging Device (ELD) project for trucking, including regulatory compliance and integrating hardware such as CalAmp, PacificTrack, BlueFire, GenX, and Digi devices over Bluetooth, BLE, Wi-Fi Direct, and wired connections My core areas of expertise include: • Bluetooth Low Energy (BLE) and connected-device integration • React Native development, debugging, and stabilization • Native iOS and Android development • End-to-end system design (device ↔ mobile ↔ backend) • Healthcare / HIPAA-compliant and regulated applications I’ve been building software professionally for over 25 years and have been lead architect on numerous iOS and Android apps, both native and hybrid. On Upwork, I have a 100% Job Success score and 3,300+ hours, and clients tend to keep me on long-term. I work well with startups and established teams and can step into an existing codebase quickly to give clear direction and deliver results.