Dainsleif contributed to both backend and frontend development across two repositories, focusing on feature delivery and architectural groundwork. For MCDReforged/PluginCatalogue, Dainsleif implemented a new controller in Java to enable future integration with the mcsm service and developed a command block handler, establishing a processing pipeline for plugin command interactions. In UNIkeEN/SJMCL, Dainsleif used React and TypeScript to build a user-facing toggle system for managing Discover page data sources, allowing users to enable or disable sources dynamically. The work demonstrated depth in backend architecture and frontend customization, with an emphasis on scalable patterns and maintainable code structure.