Multi-Tenant SaaS Infrastructure
Tenant isolation lives in application code, and every new customer or compliance rule becomes a custom infra project.
Design multi-tenant AWS infrastructure: isolation models, path and host routing, automated provisioning, RBAC, audit logging, and storage boundaries that survive compliance review.
You probably need this if…
- Tenant data isolation is enforced in app code only, one bug away from a breach
- Onboarding a new customer requires manual infra or config steps
- Compliance asks for per-tenant audit trails and you don't have them
- Path-based routing hacks break as you add regions or white-label domains
- A shared database with tenant_id is hitting limits at scale
What's actually going wrong
Multi-tenancy was bolted on after product-market fit. Isolation, routing, and provisioning weren't first-class infrastructure concerns, so every new tenant or compliance requirement becomes a one-off project instead of a repeatable platform capability.
What I review or implement
- Tenant isolation model: pooled vs siloed, storage boundaries, IAM scoping per tenant
- Routing: CloudFront path/host rules, API Gateway, Lambda@Edge auth at the edge
- Per-tenant provisioning automation via Terraform modules and pipelines
- RBAC, audit logging, and data residency requirements mapped to AWS primitives
- S3 Access Points or account-per-tenant patterns where compliance demands it
What you get
- Tenant architecture recommendation with explicit trade-off analysis
- Reference implementation for routing, auth, and storage isolation
- Automated tenant onboarding runbook and provisioning pipeline
- Compliance-ready audit logging design with retention and access controls
Proof
Multi-tenant platform from edge to database
Regulated SaaS client · Dittofi · Rose Digital
Three platforms, three isolation problems: regulated SaaS with CloudFront path routing and zero-trust edge-to-API auth; a no-code platform generating isolated customer environments from visual configs; and a public lottery app with multi-tenant Cognito SSO replacing legacy auth across 100+ Lambdas.
- Edge auth
- Lambda@Edge + API Gateway tenant routing
- Isolated envs
- Generated per-customer deployments
- Cognito SSO
- Multi-tenant auth at public scale
Request a tenant architecture assessment
Describe your symptoms, not a job spec. I'll reply within 48 hours with an honest read on whether the problem is structural, operational, or something else entirely.