DOAN DUY PHUONG

Ho Chi Minh

• ▸Built a UIKit + SwiftUI design system library supporting 4 dynamic appearances with customizable brand colors, adopted by 3+ teams, reducing UI development time by 40% across the ePost iOS app; hosted SwiftUI components inside UIKit-owned navigation using UIHostingController
• ▸Shipped feature screens following Coordinator + MVVM (input/output) architecture with RxSwift/RxCocoa bindings, ViewModel, Coordinator, and service layers matching the existing app structure
• ▸Worked across Dev, Staging, and Production schemes with xcconfig-driven environment configuration, SPM dependencies, and Fastlane + Firebase App Distribution + TestFlight release workflows
• ▸Leveraged AI-assisted development (Claude, ChatGPT, Grok) to accelerate research and implementation, increasing development velocity by 60%

Ho Chi Minh

• ▸Collaborated with a dynamic design team to create app user experience in adherence to Apple's user interface guidelines
• ▸Built feature screens with ViewController, ViewModel, and service layers using Swift and UIKit, aligning with Coordinator + MVVM architecture and SOLID principles
• ▸Bound user events and state with RxSwift/RxCocoa input/output transforms, and integrated a shared ApiService with authenticated requests and refresh-token handling
• ▸Wrote unit tests using XCTest with mocks/stubs for network and service boundaries, achieving 90% coverage at the ViewModel layer; used RxTest for reactive test cases
• ▸Integrated REST APIs, push notifications (APNs via OneSignal), and real-time connections using NWWebSocket

Ho Chi Minh

• ▸Maintained and implemented improvements for existing features across iOS and tvOS targets, including onboarding, home, course detail, and profile flows
• ▸Implemented app flows with deep links and environment-specific configuration (xcconfig) across dev/staging/production schemes
• ▸Developed CI/CD pipelines with Fastlane and Bitrise for automated deployment to Firebase App Distribution and TestFlight, supporting the QA testing process
• ▸Led efforts to refactor and update the project's architecture toward Coordinator + MVVM
• ▸Developed UI/UX for tvOS enabling users to manage courses and learn from their Apple TV using AVFoundation

Canada Client

• ▸Led a team of 2-3 members, developing task plans and conducting code reviews in an existing production codebase with multiple schemes and SDK integrations
• ▸Implemented OAuth 2.0 with PKCE flow for secure authentication, AES encryption for credential storage using Keychain Services, and JWT/crypto handling for encrypted APIs
• ▸Built app session state management, refresh-token handling, and deep links / associated domains; applied zero-knowledge architecture principles to VPN tunnel key management
• ▸Integrated Firebase Analytics, Crashlytics, and push notification extensions (Notification Service Extension) for rich push payloads
• ▸Engaged in strategic discussions with CEO and CTO, contributing to brainstorming sessions for new features and maintenance
• ▸Implemented CI/CD pipelines with Fastlane and Bitrise for automated deployment to QA environment