Worked on the litebird_sim repository to deliver a configurable NSIDE-resolution feature for HWP_sys, enabling output maps to be generated at a different NSIDE than the input. The implementation ensured that map-making operated only on observed pixels and included a safety assertion to prevent the output NSIDE from exceeding the input NSIDE. Automated tests were introduced to verify the nside_out parameter, supporting robust validation of the new functionality. The work involved targeted fixes in hwp_sys.make_map to improve reliability. This feature was developed using Python and Markdown, leveraging skills in data analysis, scientific computing, and software development for precise map generation.