Multi-tenancy is one of those architectural decisions that's easy to get wrong early and expensive to fix later.
I've implemented this across multiple enterprise SaaS products and spent a lot of time thinking through the tradeoffs. I wrote a deep-dive covering all 4 strategies:
- Schema-per-tenant
- Database-per-tenant
- Row-level security (PostgreSQL RLS)
- Shared schema with tenant_id
With real PostgreSQL examples, performance tradeoffs, and a decision framework for picking the right one.
Read the full post → https://syedarifiqbal.com/blog/multi-tenant-saas-isolation
Originally published on my blog. I write about backend architecture, NestJS, Node.js, and building scalable systems.
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