Ashwin worked on ERP migration integrations and backend refactoring across the fylein/fyle-intacct-api, fyle-xero-api, fyle-qbo-api, and fyle-netsuite-api repositories. He centralized expense state handling by moving logic from Django signals to a dedicated trigger class, improving reliability and data integrity. Ashwin standardized SQL migrations for Intacct, Xero, QBO, and NetSuite, integrating scripts like delete_workspace.sql and re_export_expenses_* into Django migrations. Using Python, Django, and SQL, he updated tests to cover new migration and trigger flows. This work reduced deployment risk, streamlined onboarding of new ERP connectors, and improved cross-system data synchronization, demonstrating strong backend engineering depth.