During January 2026, Jeffy Wu developed and integrated Notional Token Price Data functionality within the DefiLlama/defillama-server repository. He focused on backend development using TypeScript, implementing API integration and GraphQL to fetch and calculate token prices directly from the Notional protocol. By adjusting the pricing model to account for Notional Exponent values, Jeffy improved the accuracy and reliability of yield data retrieval and price feeds. His work enhanced database management practices and laid a foundation for supporting additional assets. Throughout the process, he maintained clear documentation and commit hygiene, ensuring the codebase remains maintainable for future development and maintenance.