Data modeling

Model a multi-tenant SaaS data layer

A data modeling preview for a SaaS product that needs reliable tenant isolation and billing-grade usage data.

Scenario

Prompt preview

Model the data layer for a multi-tenant SaaS with per-tenant billing, usage metering, roles, and audit logs.

Entity modelingTenant isolationBilling eventsAuditabilityAccess patterns

Rubric preview

The public preview shows what good evidence looks like. The app scores your actual answer and stores the receipt.

Frame: identifies tenant boundary, billing accuracy, and audit requirements.

List: names core entities, events, relationships, and access patterns.

Optimize: explains isolation, denormalization, and history trade-offs.

Follow-ups

Do tenants share tables, schemas, or databases?

Which events power invoices?

What audit records must be immutable?

Locked workspace

Answer workspace with timers, notes, schema or code context where relevant.

Hatch follow-ups that adapt to your weak move instead of giving generic hints.

FLOW score receipts across Frame, List, Optimize, and Win.

Next-drill routing into the career goal you are training for.

Public previews show the map. The app gives you reps, Hatch follow-ups, FLOW feedback, weak-move drills, and saved proof of progress.