Scaling a multi-tenant SaaS platform from 500 to 5,000 active businesses required a complete rethink of our architecture. Here's how we did it.
The Challenge
Our original architecture was designed for hundreds of tenants. As we approached 2,000 businesses, we started seeing performance degradation during peak hours. Database queries that took milliseconds were now taking seconds.
The Solution
We implemented a hybrid multi-tenant architecture that combines shared infrastructure with tenant-specific optimizations. Key changes included database sharding, read replica routing, intelligent caching with Redis, and background job prioritization.
Results
After the migration, we saw 10x improvement in query performance, 99.99% uptime, and the ability to onboard 100 new businesses per day without any infrastructure changes.