Hoang D.

Hi, I'm Hoang, a mobile app developer with 10+ years of experience, 60+ apps developed, and 6,000+ hours of freelance work. I specialize in building high-quality iOS and Android applications, from initial ideas to production-ready products. By combining proven engineering practices with AI-powered tools like Claude Code, OpenAI Codex, and ChatGPT, I can accelerate development, solve complex problems, and deliver efficient, reliable solutions without compromising code quality or user experience. 🛠️ My Expertise - iOS: Swift, SwiftUI, Objective-C - Android: Kotlin, Java - Cross-Platform: React Native - AI Development: AI-powered apps, chatbots, OpenAI API - Backend & APIs: REST APIs, Firebase, Supabase, Node.js - Payments & Monetization: In-App Purchases, RevenueCat, Stripe, AdMob - Other Integrations: Maps, GPS, push notifications, real-time chat, video calling, and third-party SDKs ✅ Why Work With Me? - Clean, maintainable code and scalable architecture - Faster development through AI-assisted workflows - Clear communication and regular progress updates - Reliable delivery, bug fixes, and ongoing maintenance - Commitment to long-term client relationships 🤝 Let's Build Your App Together! Whether you're launching a new app, improving an existing product, integrating AI features, or looking for a reliable long-term development partner, I'm ready to help. 💌 Send me a message or invite me to your job post. Let's discuss your project!