Designing an Inventory Management System That Scales

Inventory systems that work fine at low volume often break down under concurrent updates, when multiple warehouse staff or sales channels try to adjust the same stock count at once.

Using proper database transactions and optimistic locking around stock adjustments prevents the overselling and phantom stock issues that plague poorly designed systems.

We stress-test inventory systems under simulated concurrent load before launch, since this class of bug rarely shows up in normal single-user testing.