Carlos contributed to both the aave/interface and cowprotocol/services repositories, focusing on cross-network token support and documentation quality. In aave/interface, he expanded GHO/aGHO token compatibility across Gnosis Chain, Arbitrum, and Base by updating asset configurations, and enabled aBasweETH as collateral for Cowswap, improving liquidity and user onboarding across multiple networks. His work relied on TypeScript and configuration management to ensure seamless integration. In cowprotocol/services, Carlos enhanced OpenAPI schema documentation by correcting a key description, using YAML and documentation best practices to clarify API usage for developers. His contributions addressed interoperability and maintainability with targeted, well-scoped engineering solutions.