Multi-Tenant Architecture: How We Scale
A deep dive into our SaaS architecture and how we ensure data isolation for each customer.
Building a SaaS platform that serves multiple businesses requires careful architectural decisions. At Luniops, we chose a multi-tenant approach built on Firebase that ensures complete data isolation while keeping operational costs manageable.
Each tenant (company) gets their own isolated data space within Firestore. Security rules ensure that users can only access data belonging to their tenant. This means a user from Company A can never see or modify data from Company B, even if they somehow obtained a valid authentication token.
Our role-based access control system operates at both the tenant and module level. Each tenant can define custom roles with granular permissions — for example, a warehouse manager might have full access to inventory but read-only access to orders.
For scalability, we leverage Firebase's automatic scaling capabilities. As a tenant grows from 10 to 10,000 orders per month, the infrastructure scales automatically. There's no manual intervention needed, and performance remains consistent regardless of data volume.
Data backup and recovery is handled at the tenant level. Each tenant's data can be independently exported, backed up, or migrated without affecting other tenants. This also makes regulatory compliance simpler, as we can handle data residency requirements on a per-tenant basis.