Huqitod Topup – Game Top-Up Platform
High-traffic game top-up and digital delivery platform.
Overview
Backend engineering for a high-traffic game top-up and digital delivery platform with reliable payment and fulfillment flows.
The Challenge
Race conditions where two users might trigger the same API callback, causing double delivery of digital goods.
The Solution
Implement Database Transactions and Idempotency Keys for all payment callbacks. This ensures that even if an API provider sends a "Success" webhook twice, the system only processes the top-up once.
Results
- Eliminated double-delivery risk with idempotency
- Reliable high-traffic payment and fulfillment