Salvo Borgesi focused on enhancing the pagopa/interop-be-monorepo repository by improving the Catalog Service’s performance and scalability. He introduced tenant caching and bulk tenant retrieval, refactoring the service to fetch and store tenant data in memory, which reduced redundant API calls and improved lookup latency. Using TypeScript and applying backend development and caching techniques, Salvo updated the enhanceCatalogEService method to support multiple eservices, enabling efficient bulk operations. Although no bugs were fixed during this period, his work addressed system bottlenecks and prepared the service for higher loads, demonstrating a thoughtful approach to backend optimization and API integration challenges.