Trung L.

Senior iOS Developer with 8+ years of hands-on experience building, maintaining, and scaling high-quality iOS applications using Swift, SwiftUI, UIKit, and Objective-C. I specialize in developing production-ready mobile apps with clean architecture, smooth user experience, and reliable performance. I have strong experience with Firebase, Firestore, Cloud Functions, REST APIs, in-app purchases, subscriptions, Apple Sign In, push notifications, Core Data, Realm, widgets, BLE, and App Store release workflows. In addition to native iOS development, I also have experience working with Chromium-based projects, WKWebView-heavy applications, browser-style features, custom web-to-native integrations, JavaScript bridge communication, deep links, and hybrid app flows. This allows me to handle complex projects that combine native iOS performance with embedded web/browser functionality. I can help you with: - Building iOS apps from scratch using SwiftUI or UIKit - Refactoring and improving existing iOS codebases - Fixing complex bugs and performance issues - Firebase, Firestore, Authentication, Cloud Functions, and Push Notifications - In-app purchases, subscriptions, and payment-related flows - REST API integration and real-time data synchronization - Core Data, Realm, offline storage, and local caching - Chromium-based features, WKWebView, JavaScript bridge, and hybrid app flows - BLE, Apple Sign In, widgets, and native iOS features - TestFlight, App Store submission, and production release support - UI polishing based on Figma or existing designs I focus on writing clean, maintainable, and scalable code. My goal is not only to complete tasks, but also to help clients build stable, user-friendly, and production-ready iOS applications. If you are looking for a reliable iOS developer who can understand requirements quickly, communicate clearly, and deliver high-quality work, I would be happy to help with your project.