Developed a practical User Session Management Demo for the eugenp/tutorials repository, focusing on demonstrating how to store, retrieve, and remove user sessions in a Java EE web application using HttpSession and Servlets. The implementation emphasized maintainability and clarity, with a refactored code structure to support future enhancements and educational use. Comprehensive unit tests were created using JMockit to validate session management behavior and ensure correctness. The work provided reusable patterns for session handling and improved onboarding for learners, highlighting disciplined use of Java and mocking frameworks while prioritizing code quality, test coverage, and clear organization throughout the development process.