Worked on improving reliability and stability in open source JavaScript infrastructure, focusing on bug fixes in state management and build tooling. In the pmndrs/zustand repository, addressed hydration integrity by ensuring the post-rehydration callback consistently used the latest store state, reducing flakiness in server-side rendering and persistence workflows. Enhanced robustness by adding regression tests and updating middleware for accurate state propagation, leveraging TypeScript and React expertise. In the vitejs/vite project, fixed unhandled promise rejections in the file-watching pipeline, improving error handling and developer experience in watch mode. Demonstrated strong skills in Node.js, full stack development, and collaborative problem-solving.