Step 1 of 13 · Intro

Design a multi-tenant SaaS platform

Share one platform between hundreds of customers without letting any of them hurt the others.

How it works

• ›Every request is tied to a tenant from the caller's credentials.
• ›Capacity is shared, but each tenant has a limit and a placement.
• ›Premium tenants may get stronger isolation for a higher price.

What you'll build

1. A tenant-aware API and data model
2. A gateway and cache for the shared path
3. A rate limiter that stops a noisy neighbour
4. Sharding by tenant and isolation tiers
5. Cheap background compute, and surviving a cold cache and a lost primary