Worked on a comprehensive codebase refactor for the juanfcarrillo/servicios-ciudadanos repository, focusing on backend development and code organization using Python and Django. The primary effort involved modularizing models to enforce the Single Responsibility Principle, which improved maintainability and reduced coupling across the codebase. Repetitive conditional logic was replaced with descriptive model methods, enhancing readability and reducing complexity. All changes were validated against existing Behave BDD tests to ensure behavioral consistency. This refactoring laid a foundation for easier future maintenance and faster feature iteration, while also reducing technical debt and improving the overall testability of the backend system.