Samuel H.

I specialise in building, fixing and reviewing mobile apps for connected hardware products (BLE Bluetooth, Wi-Fi, IoT) and React Native applications where reliability and real-time behaviour are critical. I’m often brought into projects that are close to release or experiencing issues, to assess build quality, resolve problems, and ensure successful App Store / Play Store submission. This includes stepping into existing React Native apps to: * fix bugs and stability issues * upgrade React Native versions * resolve build and deployment problems * improve performance and reliability I am an Upwork Top Rated Plus developer based in the UK, with extensive experience across iOS (Swift, SwiftUI, Objective-C) and React Native. My core areas of expertise include: * Bluetooth Low Energy (BLE) and connected device integration (health, fitness, audio) * React Native development, debugging and stabilisation of existing apps * iOS development (iPhone, iPad, Apple Watch, Apple TV) * App review and pre-submission optimisation * End-to-end system design (device ↔ mobile ↔ backend) I have worked with global brands including Bose, Corsair, Musclegun, SC Johnson and others, delivering production applications across consumer, health and wellness sectors. My focus is always on delivering reliable, production-ready applications that perform consistently in real-world use. I’m comfortable working with both startups and established teams, and can quickly step into existing projects to provide clear direction and deliver results.