Worked on the odoo/odoo repository to enhance the reliability of the Point of Sale (POS) module by addressing a critical backend issue. Developed and implemented a fallback mechanism in Python within the Odoo framework to handle cases where products lacked assigned categories, which previously caused exceptions and disrupted checkout processes. The solution introduced robust error handling and a safe default path, ensuring that uncategorized products no longer triggered system failures. This backend fix improved business continuity by preventing POS downtime and maintaining smooth transaction flows. The work demonstrated strong skills in error handling, backend development, and practical application of the Odoo framework.