A website for selling Revit software license activation keys integrated with VNPay payment system and automatic key generation.
Securing the key generation logic and preventing race conditions where multiple customers could purchase the same key at the exact same millisecond. We resolved this by implementing transaction queues in PostgreSQL with row-level locking during checkout validation.
Eliminated manual key delivery times down to sub-second automated delivery, leading to a 40% increase in customer checkout completion rates.
