Rveguilla enhanced the maintainability of the Netflix/dgs-codegen repository by centralizing hard-coded string literals into a dedicated ParserConstants class. This targeted refactor, implemented in Java and Kotlin, preserved existing functionality while establishing a single source of truth for string values throughout the codebase. By extracting constants and improving code organization, Rveguilla reduced duplication and technical debt, laying the groundwork for safer and more efficient future refactors. The work demonstrated a strong focus on code quality and maintainability improvement, with clear change traceability through commits, and contributed to the long-term stability of the GraphQL code generation pipeline.