Cheat sheet · Beginner · 5 min
SaaS building blocks cheat sheet
The tables, flows and services every SaaS needs. 4 sections, 17 entries.
- Data
- Billing
- Admin
Entries 17
Lab · Advanced · 1h
Lab: Webhook chaos
Send your billing webhook handler out-of-order, duplicated and malformed events and confirm the subscription state stays correct.
- Your handler works on the happy path. Providers do not deliver the happy path.
Tasks 4
Project · Advanced · 16h
Project: A paid SaaS with two plans
Build and deploy a SaaS with accounts, two plans with limits, subscription billing via webhooks, an admin customer view and the operational basics.
- Ship a small SaaS: users and accounts, two plans with one enforced limit, checkout and webhook-driven activation with idempotency, a cancel-at-period-end flow, an admin customer screen with two audited actions, and the five operational services. Deploy it and take one real test payment.
- Milestone 1: Model and access
- Milestone 2: Billing
Learning path · Advanced · 12h
Build a SaaS end to end
The parts every SaaS needs — accounts, plans, billing, admin, operations — built in order on a small real product.
- Build a multi-user SaaS with plans, subscription billing, an admin area and the operational basics, and deploy it.
- Skills: Data modelling for accounts and plans, Subscription billing via webhooks, Entitlements and access control, Admin tooling, Operations: logs, backups, monitoring
Time 12h

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SaaS building blocks cheat sheet

Lab: Webhook chaos

Project: A paid SaaS with two plans

Build a SaaS end to end