Coding Arena is a full-stack coding platform that I developed using the MERN stack. It enables users to register securely, solve coding problems, and submit their solutions through an integrated code execution system. The platform features JWT-based authentication, role-based access for users and administrators, problem management, RESTful APIs, and a responsive React frontend. This project strengthened my understanding of backend architecture, API development, database design, authentication, and state management while giving me practical experience in building scalable web applications.