🎯 Fresher / Junior .NET Backend Developer
💡 Passionate about Clean Architecture, CQRS, and scalable backend systems
📍 Based in Long An, Vietnam

• Final-year IT student at Saigon University
• Internship experience at VNPT Long An, developing real-world APIs using ASP.NET Core and EF Core
• Enjoy designing maintainable backend systems and learning new architecture patterns
• Strong interest in system design, microservices, and software scalability

• Languages: C#, SQL, LINQ
• Frameworks: ASP.NET Core, Entity Framework Core, WPF (MVVM)
• Architecture: Clean Architecture, CQRS, Repository & Unit of Work
• Database: PostgreSQL, SQL Server
• Security: JWT Authentication, Role-based Authorization
• Tools: Git, GitHub, Swagger, Docker (basic), GitHub Actions (CI/CD)

Tech: .NET 8, EF Core, PostgreSQL, CQRS, MediatR, WPF (MVVM)

• Built a desktop client + backend architecture following Clean Architecture principles
• Implemented CQRS pattern with MediatR for separation of concerns
• Practiced IAsyncEnumerable streaming, LINQ optimization, and domain-driven modeling
• Focused on reusable UI components and transaction-safe repositories

🔗 Repo: github.com/toiQS/TaskMind

Tech: ASP.NET Core, EF Core, PostgreSQL, Swagger, JWT, VNPAY Integration

• Developed backend APIs for authentication, product management, and payment flow
• Integrated VNPAY payment gateway and handled secure callbacks
• Improved DB schema with EF Core migrations and indexing

🔗 Repo: github.com/toiQS/Digital-product-trading-system

📩 Email: nguyensieu12112002@gmail.com
💼 LinkedIn: Nguyen Quoc Sieu
🐦 Twitter/X: @sieu_nguyen02
💬 Stack Overflow: Akai