Rudi Juandi B.

I build mobile apps that go beyond standard screens: the parts that touch the device, like Apple Watch, HealthKit, Bluetooth hardware, widgets, and background sync. I work natively in Swift/SwiftUI and cross-platform in Flutter. That combination matters: most cross-platform projects eventually need native code (health data, BLE, widgets, a watch companion), and that’s exactly where I’m strongest. Top Rated on Upwork · Currently at the Apple Developer Academy, University of Naples Federico II · Alumnus of Apple Developer Academy @ Infinite Learning Batam · Apple Developer Institute for Entrepreneurship WHAT I CAN BUILD FOR YOU - iOS apps in SwiftUI/UIKit, from MVP to App Store release, - Flutter apps for iOS + Android, including custom platform channels and native plugins, - Migrating existing native or cross-platform apps to Flutter, - Apple Watch companion apps, complications, Smart Stack widgets, - HealthKit integrations (heart rate, HRV, workouts), - Bluetooth Low Energy (BLE) device connectivity, - Subscriptions, App Store submission, and review issues. SHIPPED WORK - Mindfulness app (iOS + Apple Watch): live on the App Store, measures stress through heart rate and HRV. Now being migrated to Flutter for Android. - Senior care app (React Native): care coordination app with subscription architecture, shipped through App Store review. - Racqee: AI tennis app with Apple Watch that automatically captures key match moments using motion intelligence. HOW I WORK I also take on the product role: scoping features, writing acceptance criteria, and pointing out when something can be done simpler or cheaper. You get regular builds to test, not just a final delivery. If your app needs to talk to a watch, a sensor, or health data, or you want it on both iOS and Android, send me a message.