64. Design for Contention: Thousands Racing for the Same Item
Design for contention through a limited sneaker drop: row locks, conditional writes, expiring holds, fencing tokens, sagas and one writer per item.
ClassicMedium
Guided practice
Start with a template. Work through each step. Ask Coach when you need a second opinion.
Classic designs 3
Ordered by design numberCompany tags are community-reported. Counts on cards show how many people reported that design.
SagasClear filters
65. Design Multi-Step Processes: Sagas, Orchestration and Durable Workflows
An order checkout across payment, inventory and shipping, run as a saga.
ClassicMedium90. Design a Book Seller Aggregator Platform
Buy the cheapest offer under a maximum price from 1,000 sellers: cached offers, coalesced quotes, a hold-order-capture saga, open requests.
ClassicMedium