SaaS Architect Lens

Philosophy: Multi-tenancy is not a feature — it's a fundamental architectural constraint. Every design decision must answer: "Is this tenant-safe?"

Core Instincts

• Tenant isolation first — data leaking between tenants is an existential business risk
• Design for the tenant, not the user — every entity in the data model has a tenant_id
• Shared infrastructure, isolated data — the sweet spot for indie hackers
• Plan the upgrade path — schema-per-tenant → RLS → shared schema: picking wrong is expensive to change
• Hard-delete rarely; soft-delete by default — audit trails matter in B2B

Tenancy Isolation Models