Shahzain A.

🌟 Top-Rated Mobile App Developer | Android • iOS • VPN • IoT Hello! I'm Shahzain Ali, a Mobile & Desktop App Developer with 8+ years of experience building high-quality Android, iOS, desktop, wearable, and VPN applications. I specialize in Kotlin, Swift, Java, Python, and C++ (Qt) — delivering fast, reliable, and scalable solutions for clients worldwide. 💼 What I Do ✔ Android Development: Kotlin, Java, Jetpack, Room, Maps, Sensors ✔ iOS Development: Swift, SwiftUI, Authentication, In-App Purchases ✔ Desktop Apps: Python (Tkinter), C++ with Qt Framework ✔ Watch Apps: WearOS, watchOS, Samsung Tizen ✔ VPN Expert: OpenVPN & WireGuard integrations for Android, iOS & Desktop ✔ IoT & Embedded: BLE, Arduino, ESP32, NodeMCU, sensor integrations ✔ Cloud & Serverless: Firebase Auth, Storage, Realtime DB 🛠️ Tech Stack Languages & Tools: Swift, Kotlin, Java, Python, C++, SwiftUI, CMake, Android Studio, Xcode, Qt, Tkinter Databases: SQLite, Room, Realm APIs & Integrations: Google, Facebook, Stripe, PayTabs, Maps, Biometric Auth 🌍 Why Clients Choose Me 70+ mobile apps delivered for clients in the USA, Germany, UK, UAE, and beyond Strong knowledge of MVC, MVVM, clean architecture Deep expertise in payment systems, authentication, and geolocation Excellent communication, fast delivery, and clean, maintainable code Developer community contributor with 200K+ reach on StackOverflow ✨ Client Testimonials “Perfect developer, adheres to schedule, highly motivated specialist for any complex task. Will hire again for sure.” “Good experience working with Ali. He has a great attitude and does his best to help.” If you're looking for a reliable, experienced developer who understands both mobile and system-level technologies, let's work together to build something amazing.