E-commerce Architecture: Developed an integral sales platform using Node.js and JavaScript, focused on the robustness of the purchasing process. Inventory and Cash Management: Implemented a real-time stock control system and calculation logic for the cash register, ensuring data consistency through MySQL transactions. Authentication and Security: Integrated a user management system with session control, protecting access routes and profile data. Shopping Cart Logic: Developed the business logic for the shopping cart, ensuring persistence and correct product validation before finalizing the transaction.

Developed a scalable RESTful API with Node.js and Express for efficient entity management using CRUD operations. Structured the project architecture under the MVC design pattern, ensuring modular and easily maintainable code. Optimized data integrity by implementing custom middlewares for strict validation and error handling. Ensured protection against SQL injections by integrating MySQL with prepared statements via mysql2.

Optimized the operational management of a dental clinic by developing an integral system in PHP, digitizing all records. Modeled a relational database in MySQL to ensure the integrity and security of medical histories, appointments, and patient profiles. Implemented an authentication and role control system (Administrator/User) to ensure the privacy of sensitive information. Integrated the backend with HTML, CSS, and JavaScript interfaces to allow dynamic loading and real-time visualization of appointments.