Hua C.

I'm a senior mobile app developer with 10+ years of experience building, improving, and maintaining iOS and Android applications. I specialize in native mobile development, cross-platform applications, API integrations, production troubleshooting, and ongoing app maintenance. I've worked with clients across healthcare, sports, property technology, entertainment, and other industries. Here's how I can help: - iOS Development: Swift, SwiftUI, native features, API integrations, performance optimization, and App Store releases. - Android Development: Kotlin, Java, Android SDK, bug fixing, app modernization, and Google Play releases. - Cross-Platform Development: React Native and Flutter applications for iOS and Android. - App Maintenance: Codebase reviews, troubleshooting, dependency upgrades, Firebase integration, and long-term support. - Backend & APIs: Node.js, REST APIs, authentication, databases, and third-party SDK integrations. - Testing & Deployment: Debugging, TestFlight, production builds, and Google Play release support. I've helped clients solve difficult technical problems, improve existing applications, and deliver new features. One of my previous Upwork projects involved urgent Android updates to help restore applications to Google Play, and the client later praised the impact of my work. I enjoy working directly with clients, understanding their product goals, and finding practical technical solutions. Whether you need to build a new mobile application, improve an existing codebase, fix production issues, or maintain your app over the long term, I can help. I value clear communication, reliable delivery, and code that's easy to maintain and extend. Feel free to reach out through Upwork to discuss your project.