During October 2024, Nguyen focused on backend development and code refactoring for the myworkspace-ind/crm repository, specifically addressing stability in the Customer Validator component. Nguyen resolved a faulty dependency import by removing the incorrect reference and introducing a shared utility class for common validation checks. This approach ensured that Customer Validator leveraged application-wide utilities, reducing runtime errors and minimizing cross-module coupling. Working primarily with Java, Nguyen centralized validation logic to improve maintainability and lower risk across modules. Although the work centered on a single bug fix, the solution demonstrated thoughtful backend engineering and a clear understanding of robust Java development practices.