This paper describes the development of a web application for sports betting using modern web technologies. The goal of the application is to provide users with an intuitive and responsive interface for tracking and managing their bets in real-time. Best practices were employed in the development of the application. It features responsive design, making it accessible on both large and small screens. Input validation is performed on both the client and server sides. A TLS connection is used to encrypt data during transmission. JWT tokens are used for authentication, stored in HTTP ONLY cookies to prevent client-side tampering. Client-server requests are handled asynchronously to ensure non-blocking operations. The application has been thoroughly tested and is secure. Additionally, the application includes a feature that automatically ranks users based on the success of their last 10 bets, fostering a competitive spirit among users. The leaderboard is available on the "Leaderboard" screen. Users can also participate in discussions about matches, contributing to community building within the application. The application uses Vue.js for front-end development, Node.js for back-end, and MongoDB as the database. Sports event data is retrieved from an external API, while user data is securely stored in the database. The paper includes a detailed description of the system architecture, user interface design, and the development methodology following the spiral model. The concluding section discusses the challenges encountered during development, their solutions, and opportunities for future system upgrades. In conclusion, the ScoreBet web application successfully implements all specified goals and provides a solid foundation for further development and feature expansion.