Worked on the apache/arrow repository to address compiler warning suppression and API export issues in the Parquet C++ module. Focused on improving build system reliability by implementing missing pragma warning(pop) directives and disabling warning 4250 across multiple source and header files, targeting both MSVC and GCC compilers. Introduced the PARQUET_EXPORT macro to ensure correct symbol visibility, which stabilized API exports and reduced downstream build warnings. Leveraged expertise in C++ and build systems to enhance code hygiene and continuous integration reliability. The changes, linked to GH-47099, contributed to a cleaner build process and improved maintainability for Parquet integration within Arrow.