Worked on the streamich/memfs repository to refactor asynchronous file system operations, focusing on migrating async I/O from setImmediate to Promises. This change improved performance and predictability by leveraging JavaScript Promises within the current task stack, reducing latency jitter for I/O-heavy workloads. The update also included removing setImmediate-related tests and imports, resulting in a cleaner and more maintainable codebase. Demonstrated skills in asynchronous programming, Node.js, and TypeScript while emphasizing disciplined, traceable commits. The work centered on stability and performance optimization, addressing technical debt and ensuring more reliable asynchronous behavior without introducing new features or fixing bugs.