SaaS Infrastructure

Multi-tenant SaaS Architecture

A comprehensive architectural implementation demonstrating strict tenant isolation, scalable database design, and tenant-aware routing.

The challenge

Building a B2B SaaS requires a fundamental decision on data isolation. Mixing tenant data in a single database risks catastrophic data leaks, while provisioning separate databases for every small client is cost-prohibitive and a nightmare to maintain.

The solution

We implemented a hybrid multi-tenant architecture using PostgreSQL Row-Level Security (RLS) for strict logical isolation within shared tables, combined with schema-per-tenant for enterprise clients requiring physical separation. The architecture includes automated database migrations across all tenants and a tenant-aware authentication middleware.