I build practical web products with C#/.NET, TypeScript, PostgreSQL, and SQL Server — from secure APIs and relational data models to responsive user experiences.
Open to Backend, Full-stack, and Software Engineering Internship/Fresher opportunities.
I am a Software Engineering student at HUFLIT University in Ho Chi Minh City, focused on backend and full-stack web development. I enjoy turning real requirements into working products: designing relational databases, implementing authentication and role-based access, integrating external services, and building real-time features.
My projects cover education technology, social commerce, e-commerce, and business management. Through them, I have worked with modern .NET and TypeScript ecosystems, Clean Architecture, RESTful APIs, payment workflows, cloud media storage, AI-assisted features, and Git-based collaboration.
Tôi là sinh viên Kỹ thuật phần mềm tại HUFLIT, định hướng Backend/Full-stack. Tôi tập trung xây dựng sản phẩm có thể sử dụng thực tế, mã nguồn rõ ràng, dữ liệu được thiết kế chặt chẽ và trải nghiệm người dùng hoàn chỉnh.
TOEIC Quest — Personalized TOEIC Learning Platform
An end-to-end learning platform for beginners, combining structured daily lessons, vocabulary flashcards, quizzes, personal progress tracking, and a separate administration workspace.
- Built role-aware student and admin experiences with protected routes and database-level Row Level Security.
- Designed progression mechanics including XP, levels, learning streaks, score goals, and sequential lesson unlocking.
- Added an AI-assisted lesson workflow where administrators generate, review, save as draft, and publish five-skill learning content.
- Persisted authentication, learning content, quiz results, and individual progress with Supabase PostgreSQL.
Stack: TypeScript · Next.js 16 · React 19 · Supabase Auth · PostgreSQL · Tailwind CSS · Gemini API · Node.js tests
Zynk — Social Network & E-commerce Platform
A full-stack social-commerce product that brings social interaction, real-time communication, marketplace operations, administration, and AI-assisted discovery into one system.
- Structured the backend into API, Application, Domain, and Infrastructure layers following Clean Architecture principles.
- Implemented multimedia posts, nested comments, follows, stories, direct messages, and real-time notifications with SignalR.
- Developed marketplace workflows for sellers, products, inventory, carts, orders, VietQR payments, reviews, and revenue dashboards.
- Added JWT authentication, role-based authorization, email OTP, password recovery, Google OAuth, content moderation, and responsive interfaces.
- Integrated Cloudinary for media, PostgreSQL through Entity Framework Core, and Gemini-powered search and assistant features.
Stack: C# · ASP.NET Core 9 · Entity Framework Core · PostgreSQL · SignalR · JavaScript · Docker · Cloudinary · Gemini API
BookStoreOnline — Online Bookstore Management System
Role: Team Leader · Academic e-commerce project
A bookstore platform covering the complete customer purchase flow and an administration area for day-to-day business operations.
- Coordinated a four-member team and organized the implementation of customer and administration modules.
- Built catalog search and filtering, shopping cart, checkout, order history, reviews, inventory, and order-status workflows.
- Integrated COD, PayPal, and VNPay payment options; Gmail SMTP password recovery; and Cloudinary image storage.
- Implemented account management and role-based access for Administrator, Manager, Seller, and Customer users.
- Supported multi-volume books and many-to-many category assignment using a SQL Server relational model.
Stack: C# · .NET Framework 4.8 · ASP.NET MVC 5 · Entity Framework 6 · SQL Server · JavaScript · Bootstrap
HRM Backend API — Human Resources Domain Foundation
An in-progress backend foundation for a human resource management system, modeling employees, departments, positions, roles, attendance, leave, and payroll.
Stack: C# · ASP.NET Core 8 · Entity Framework Core · PostgreSQL · Swagger/OpenAPI
More project
SneakerSport — An ASP.NET MVC sneaker store project with product browsing, cart and checkout flows, order tracking, vouchers, notifications, real-time chat, and account management.
| Area | Technologies |
|---|---|
| Languages | C#, TypeScript, JavaScript, SQL, HTML, CSS |
| Backend | ASP.NET Core Web API, ASP.NET MVC 5, Entity Framework Core/6, RESTful APIs, SignalR, JWT |
| Frontend | Next.js, React, Tailwind CSS, Bootstrap, responsive web design |
| Data | PostgreSQL, SQL Server, Supabase, relational modeling, normalization, transactions, RLS |
| Integrations | Google OAuth, Gmail SMTP, Cloudinary, Gemini API, PayPal, VNPay, VietQR |
| Tools & practices | Git, GitHub, Docker, Postman, Swagger/OpenAPI, Clean Architecture, role-based authorization |
- Translate requirements into data models, workflows, APIs, and usable product features.
- Build authentication, authorization, account-management, and third-party integration flows.
- Design and query relational databases with attention to relationships, constraints, and data ownership.
- Debug existing systems, improve features incrementally, and document projects for other developers.
- Collaborate through Git-based workflows and take ownership of assigned outcomes.
- Email: dh813345@gmail.com
- LinkedIn: Nguyễn Hải Đăng
- GitHub: github.com/HaiDang-Ng22
- Location: Ho Chi Minh City, Vietnam