Worked on stabilizing and improving core parsing components in Go-based projects, focusing on reliability and maintainability. In the golang/go repository, addressed a bug in the standard library’s regular expression engine by refining the Equal method in regexp/syntax, ensuring correct alternation handling under case folding and adding targeted tests for edge-case patterns. Later, contributed to itchyny/go-yaml by removing unreachable code related to binary and octal integer parsing, simplifying the parser and reducing maintenance overhead. Applied skills in Go, backend development, code refactoring, and compiler design to enhance code quality, correctness, and future extensibility across both projects.