Jeoffrey Haeyaert focused on backend development and policy management within the gravitee-api-management repository, addressing a resource leak issue in policy instance lifecycle management. He removed internal caching of policy instances, opting instead to create a new policy instance for each request while delegating caching responsibilities to a centralized factory. This approach, implemented in Java and leveraging API Gateway concepts, improved memory stability and reduced leak risk under concurrent load. The change resulted in a more predictable performance profile during peak API traffic. Jeoffrey’s work demonstrated a thoughtful approach to lifecycle management and contributed to the maintainability of the codebase.