Rafael worked on the cake_wallet repository, delivering a unified wallet address generation system that supports advanced address types such as P2TR, P2WSH, and MWEB across both Bitcoin and Litecoin modules. He refactored the address generation and handling logic into a single, consistent flow, which improves maintainability and simplifies future extensions or migrations. Using Dart and Flutter, Rafael updated core wallet dependencies and applied targeted fixes to enhance cross-module consistency and user interoperability with modern blockchain standards. The work focused on deep integration of cryptocurrency protocols, resulting in a more robust and extensible mobile wallet architecture without introducing new bugs.