Worked on targeted ERP improvements in both the frappe/erpnext and aerele/erpnext repositories, focusing on accounting reliability and period-closing efficiency. Delivered a feature that validates the existence of prior-year closing vouchers before general ledger checks, streamlining the period-closing process. Addressed a bug by ensuring GL entries are validated only after the previous fiscal year is closed, which prevents errors and maintains data integrity. Implemented performance optimizations by introducing pre-checks against a smaller table, reducing unnecessary database load. Utilized Python for backend development and database management, resulting in enhanced reliability, faster period closings, and improved confidence in fiscal-year transitions.