Worked on backend improvements and feature development across vaadin/flow, vaadin/hilla, and DIYgod/RSSHub repositories. Delivered configuration-driven Node.js resolution enhancements in Java and Node.js, ensuring that developer environments use specified Node.js installations and preventing unnecessary downloads. This involved cross-repository collaboration to standardize Node resolution, reducing build overhead and improving reliability. In DIYgod/RSSHub, implemented a Puppeteer-based data retrieval feature for the Javdb route using TypeScript and web scraping techniques, bypassing API restrictions and optimizing request handling for efficiency. The work focused on maintainability, aligning backend processes with configuration, and improving data collection reliability through targeted bug fixes and feature delivery.