Cloud File Storage System

Cloud File Storage System is a scalable and production-ready backend project designed using modern .NET technologies and clean architecture principles. This project represents a complete file management solution that allows users to securely upload, download, share, and manage files through a distributed microservices-based architecture. The system is built with a strong focus on maintainability, scalability, and real-world software design practices. It leverages ASP.NET Core Web API for backend services and follows the CQRS (Command Query Responsibility Segregation) pattern using MediatR to separate read and write operations, ensuring clean and testable code structures. The architecture is divided into multiple independent services, including API Gateway, Authentication Service, File Storage Service, and File Metadata Service. These services communicate with each other through well-defined APIs, enabling modular development and easier scalability. YARP (Yet Another Reverse Proxy) is used as an API Gateway to handle routing, load management, and centralized communication across services. Authentication and authorization are implemented using JWT (JSON Web Token), ensuring secure access control for all operations. The system supports user-based file management, allowing authenticated users to upload files, manage their content, and share files with controlled permissions. For data persistence, PostgreSQL is used to store metadata, while the file storage service manages physical file operations efficiently. Entity Framework Core is utilized for database operations, including migrations, LINQ queries, and optimized data access. The project is fully containerized using Docker and Docker Compose, allowing consistent development and deployment environments. This ensures that all services can run independently while maintaining seamless integration within the system. Logging and monitoring are implemented using Serilog, providing structured logging and improved observability across services. The system is designed with error handling, validation, and performance optimization in mind to simulate real-world enterprise-level applications. Additionally, the project includes features such as file sharing, permission-based access control, secure file uploads, and integration-ready API endpoints. The modular design makes it easy to extend with additional features such as notification systems, cloud storage integrations, or frontend applications. This project demonstrates strong expertise in backend development, microservices architecture, API design, and modern DevOps practices. It reflects real-world development workflows, including clean code principles, layered architecture, and scalable system design. Key highlights of the project include: • Microservices architecture with independent services • API Gateway implementation using YARP Reverse Proxy • Secure authentication and authorization with JWT • Clean Architecture with CQRS and MediatR • Dockerized environment for scalable deployment • PostgreSQL and Entity Framework Core integration • Structured logging with Serilog • File upload, download, and sharing capabilities • Modular and extensible backend system design This system is designed as a portfolio-level project showcasing advanced backend engineering skills and the ability to build scalable, maintainable, and production-ready applications using .NET technologies.