During their two-month contribution to the aspect-build/rules_js repository, Daniel Miller focused on backend reliability and developer workflow improvements. He refactored the devserver’s input handling by replacing raw-chunk stdin processing with a line-based approach using Node.js’s readline module, which stabilized interactive CLI input and reduced input-related failures. In a separate effort, Daniel addressed intermittent file I/O errors during Bazel sync by introducing a retry-with-backoff utility that wraps file operations, mitigating ENOENT errors caused by file races. His work demonstrated depth in backend development and DevOps, leveraging JavaScript and Node.js to deliver targeted, maintainable fixes that improved development stability.