Minh Duy — Full-stack Engineer — Mobile · Web · AIMinhDuy
Full-stack Engineer — Mobile · Web · AI
Full-stack engineer specializing in Mobile (Flutter, React Native, Kotlin), Cloud / Infra(AWS, Tencent Cloud), Web (Next.js, Vue.js), and AI (Local LLM - Ollama). I build cross-platform apps with real-time features (WebRTC, WebSocket) using Firebase, PostgreSQL, and MongoDB. Native Android development with Jetpack Compose. Passionate about creating innovative products with high technical standards.
FirebasePostgreSQLMongoDBFirestoreWebSocketWebRTCOllama AI
Languages I Speak
EnglishJapaneseVietnamese
03 — Experience
Work Experience
Professional journey building products across mobile and web.
Mobile Developer
TNHH Cuộc Sống Vui Khỏe
4/2025 - 10/2026
Full-stack Lead Developer at TNHH Cuộc Sống Vui Khỏe overseeing the Hathyo commercial e-commerce ecosystem (Mobile App, Web Storefront & CMS). Integrated 10+ major partners including VietinBank, Bao Kim Payment Gateway, GHTK, VietMap API, Abenla SMS, and AWS Cloud infrastructure. Managed multi-warehouse inventory, multi-level affiliate commission flows, SEO blog, and mentored engineering interns. Achieved ~300M VND in revenue within the first 2 months of launch.
Technologies Used: React Native, Next.js, Redux Toolkit, Firebase, AWS Cloud, VietinBank, GHTK, Bao Kim
Mobile Developer
VJ Technologies
3/2024 - 7/2025
Mobile Developer at VJ Technologies working on DX-ASAP, GoEmon Home, and GoEmon Community. I handle migration, bug fixes, and feature development using Flutter, Bloc, GetIt, WebSocket, Firebase, Push Notifications, and AI Detection (DX-ASAP).
Mobile Developer at Sucodev Vietnam working on the S-Home project with Flutter. I use Cubit for state management, Retrofit and Dio for network calls, WebSocket for real-time communication, and Push Notifications to enhance the app experience.
Technologies Used: Flutter, Cubit, Retrofit, Dio, WebSocket, Push Notifications,..
04 — Work
Projects
Selected projects from professional client delivery and full-stack software development.
Professional Experience
4/2025 - 10/2026TNHH Cuộc Sống Vui Khỏe
Hathyo E-Commerce (App, Web & CMS)
Full-stack Lead (Mobile, Web & CMS)
Doanh thu ~300 triệu VND (2 tháng)Hơn 10 đối tác lớnĐa kho & Affiliate đa cấp
Comprehensive e-commerce ecosystem consisting of React Native Mobile App, Web Storefront, and Admin CMS. Connected 10+ major partners (VietinBank, Bao Kim Payment, GHTK, VietMap API, Abenla SMS, AWS Cloud) and brand merchants (Sam Nu Hoang, Lan Chi Food, Shop Tran Lan). Generated ~300M VND in revenue within the first 2 months. Implemented multi-warehouse inventory, multi-tier affiliate commission flows, SEO blog, and mentored engineering interns.
Partners & Integrations:
VietinBankCổng Bảo KimGHTKVietMapAbenla SMSAWS CloudSâm Nữ HoàngLan Chi FoodShop Trần Lan
Mobile Developer (Enterprise Digital Transformation)
Dự án IT Doanh nghiệp NhậtAI Detection & WebSocketBLoC & Clean Architecture
Real-world Digital Transformation (DX) and Smart Home ecosystem built for Japanese enterprise clients. Led architectural refactoring and migration to Flutter with BLoC pattern and GetIt DI. Implemented real-time WebSocket communication, emergency push notification pipelines, and on-device AI detection models. Ensured strict Japanese software quality standards, enterprise performance optimization, and deep regression testing.
Lead Developer & Freelance Owner (Direct US Client)
3,500+ Người dùng / thángTrực tiếp chốt hợp đồng khách MỹGuest Checkout & CMS Quản trị
Direct freelance contract won through client outreach with an American business owner. Serving 3,500+ monthly active users, boosting store credibility and direct sales. Features frictionless online ordering via either member login (Google OAuth/Gmail) OR instant guest checkout (LocalStorage-based cart). Includes realtime audio/visual admin order alerts, Google Maps distance delivery calculation, custom CMS for order fulfillment, web traffic analytics, opening/closing hours scheduler, and flash sale/coupon management.
Contributed to the S-Home project using Flutter. Used Cubit for state management, Retrofit and Dio for network calls, WebSocket for real-time communication, and Push Notifications.
Cloudflare Pages + AWS k3sWebRTC LAN P2P OfflineBảng vẽ Realtime Whiteboard5 Ảnh chụp minh chứng thực tế
Cross-platform team collaboration platform combining Jira/Kanban task workflows with an interactive Realtime Collaborative Whiteboard. Modern DevOps architecture: Frontend hosted on Cloudflare Pages/Workers with GitHub Actions CI/CD; Backend on AWS (EC2, RDS PostgreSQL, Docker containerized k3s Kubernetes cluster) with automated CI/CD; Cloudinary for media assets. Breakthrough offline LAN P2P feature via WebRTC allows devices on the same local network to exchange data, voice chat, and quick meeting notes without external internet reliance. Features sprint planning and multi-role member access.
Screenshots & Evidence (5)Bấm để xem ảnh phóng to
Technologies:
Cloudflare Pages/WorkersAWS EC2/RDSDockerk3s KubernetesGitHub Actions CI/CDWebRTC LAN P2PCanvas APICloudinary
High-performance developer forum and tech sharing hub built on Cloudflare serverless edge infrastructure (Workers & D1 SQL Database). Automatically curates daily trending GitHub open-source repositories, delivers real-time tech news updates, provides a collaborative online notepad with instant URL sharing, and features an engaging community tech blogging system.
Technologies:
Cloudflare WorkersCloudflare D1 (SQL)Realtime EdgeNext.jsTailwind CSSGitHub API
Full-Stack Developer working on a crypto app with Flutter (front-end) and Firebase (back-end). I use Cubit for state management, Storage for data, and integrate a D-App wallet. The app features coin prices, stock info, WebSocket for real-time updates, and Push Notifications.
Created a comprehensive portfolio website and suite of web applications including: AI Email Writer (Gemini), Japanese Vocabulary Tool (Firebase), Business Tools (Countdown, Random Generator, Link Redirect), Bau Cua Game, Mai Hoa Divination with spiritual UI effects, and more. Built with Next.js, Firebase, and deployed on modern CDN.
Front-End Lead & Backend Support at CookDev – Led development using Vue.js, TypeScript, and Tailwind for the front end, while supporting backend tasks with Spring Boot, OAuth2, and JWT. Integrated Chatbox AI powered by Gemini API to enhance user interaction and system functionality.
Technologies:
Vue.jsTypeScriptTailwindSpring BootOAuth2JWTGemini API
