Architecture case study
Multi-Tenant SaaS Platform
Subscription billing, admin dashboards, and tenant isolation patterns for B2B SaaS growth.
SaaSMulti-tenantPostgreSQL
Problem
A B2B product needed to onboard many customers on shared infrastructure while keeping data isolated and billing accurate per tenant.
Architecture approach
Shared schema with tenant_id discipline, RBAC at API layer, and separate admin vs tenant-user application surfaces.
Key challenges
- Preventing cross-tenant data leaks in queries and caches
- Migration strategy as tenant count grows
- Usage metering for plan upgrades
Scalability decisions
- Composite indexes on tenant_id for hot paths
- Read replicas for reporting without OLTP contention
- Feature flags per tenant for phased rollouts
Outcome
Predictable onboarding for new tenants with clear upgrade path — architecture supports sharding or schema-per-tenant if compliance requires it later.
Tenant-safe
Data isolation
Tech stack
Next.js.NETPostgreSQLStripeAzureRedis
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