The website of To Negociando was developed using the WordPress platform, a widely recognized CMS (Content Management System) known for its flexibility and security. Built on a modular architecture, the site integrates various optimized plugins, ensuring a scalable and adaptable infrastructure for future updates. Moreover, this technology choice allows for an intuitive interface, both for administrators and end-users, facilitating the management of a large volume of vehicle data. The vehicle listing system uses a geolocation API to filter ads based on the user’s geographic location. This feature, combined with advanced search algorithms, enables the display of the most competitive offers, closest to the buyer, in real time. The backend logic optimizes database queries, ensuring a fast search experience, even with a large number of registered vehicles. Supporting up to 50,000 cars simultaneously, the system was designed for high performance, using caching and load balancing techniques to ensure the platform’s stability and efficiency, even under heavy traffic. The use of scalable databases, such as MySQL, and script optimization ensures that the site remains fast and responsive, guaranteeing the end-user a smooth and reliable browsing experience.