Karcis ID

High-throughput ticketing API for concurrent ticket reservations and checkout

Karcis ID is a high-performance ticketing infrastructure built to handle concurrent transactions across a wide range of events, from concerts and exhibitions to sports and community gatherings. The API is optimized for concurrency: race-condition-safe seat locking, atomic inventory decrement, and fast checkout under simultaneous buyer load. It serves as the backbone for multiple event ticketing products in Indonesia.