Cloud Architecture

Jul 6, 2026 · Backend Development

Designing a High‑Concurrency Coupon Expiration System with Task Tables and Batch Processing

The article explains why coupon expiration cannot be handled by a simple scheduled scan and presents a production‑grade architecture that uses a task‑table, four‑plane design, fine‑grained splitting, lease‑based worker coordination, idempotent updates, and observability to reliably expire billions of coupons under peak load.