Lisandro Cortina developed a listener-based event handling framework for the SpacetimeDB and SpacetimeDB SDK repositories, focusing on scalable event-driven architecture in C#. He refactored the Table class to integrate AbstractEventHandler, enabling insert, update, and delete events to be managed through custom listeners rather than direct subscriptions. This approach improved decoupling between business logic and event infrastructure, enhancing maintainability and flexibility for SDK users. By unifying event-handling APIs across core and SDK components, Lisandro established a consistent developer experience and laid the groundwork for future extensibility. His work demonstrated depth in API design, software design patterns, and SDK development.