Worked on the ethereum/kohaku-commons and ethereum/kohaku-extension repositories, delivering four features and resolving two bugs over two months. Focused on enhancing security, privacy, and user experience for smart wallet and browser extension projects. Implemented a DKIM-based recovery demo and introduced canonical key derivation for Railgun using TypeScript and Solidity, improving both reliability and security. Addressed continuous integration reliability by updating dependencies and clarified onboarding documentation. Streamlined user experience by removing unnecessary real-time token price tooltips and refining privacy provider configurations. Demonstrated a full stack approach, applying blockchain development, cryptography, and front end skills to improve maintainability and developer experience.