I revitalized a 3-year-old commercial real estate website for Miami properties. The original infrastructure and libraries were outdated, creating security risks and blocking new feature development. I performed a complete codebase refactoring and upgraded all dependencies. This involved fixing 59 critical build errors, replacing deprecated functions with modern solutions, and securely reconnecting the database via environment variables. Finally, I wrote comprehensive documentation. The result is a secure, stable, and fully modernized platform ready for future business growth.