Multi-tenant Admin

Administration back end for a SaaS product serving many customer workspaces. One admin manages tenants, users, and roles, per-tenant billing and feature flags, and strict data isolation between workspaces at the API and database level, so the team can support customers without any risk of cross-tenant access.

NestJS
PostgreSQL
React

The problem

A SaaS product served many customer workspaces, but the team managed tenants through database scripts and one-off tools. Applying a feature flag or a billing change meant a developer, there was no single view of a tenant's users and settings, and the risk of a change leaking across tenants grew with every customer.

The solution

I built an administration back end with a NestJS API and a React admin interface. Admins manage tenants, users, and roles, set per-tenant billing state and feature flags, and view activity for a workspace from one screen. Tenant isolation is enforced at the API and database level, with every query scoped to the tenant and tested for cross-tenant access.

The result

Non-developers now handle tenant management, feature rollouts happen per customer with a toggle, and the team has confidence that one tenant's data cannot reach another. Support and account management stopped queuing up behind engineering.