How to Build a SaaS Backend in Under 10 Minutes

Before you write a single line of frontend code, your SaaS needs backend infrastructure for three things:

1. Authentication — User registration, login, logout, password reset, and session management. Without auth, you don't have users. 2. Database — Storing your application data: user profiles, settings, content, transactions, whatever your SaaS does. 3. File Storage — User avatars, document uploads, exported reports, media files. Almost every SaaS needs to store and serve files.

Traditionally, setting up these three capabilities takes 2–4 weeks of backend development. With a BaaS aggregator like ShipStack, you can have all three running in minutes.

Sign up at shipstack.codes and create a new project. You'll choose a name (e.g., "my-saas") and select your provider — Supabase, Firebase, or Upstash. If you're not sure, start with Supabase (it's PostgreSQL-based and has the most flexibility).

Paste your provider credentials (Supabase URL + anon key, or Firebase service account). ShipStack connects to your provider's infrastructure — it never stores your data.

You'll get back a tenant slug (e.g., my-saas) and an API key. That's all you need.

With your API key and tenant slug, you can immediately register and authenticate users:

Register a user: POST https://api.shipstack.codes/api/auth/register Headers: Authorization: Bearer YOUR_API_KEY, X-Tenant-Slug: my-saas Body: { "email": "user@example.com", "password": "secure123" }

Login: POST https://api.shipstack.codes/api/auth/login Body: { "email": "user@example.com", "password": "secure123" } Response: { "token": "eyJ...", "user": { "id": "...", "email": "..." } }

That's it. No Passport.js configuration, no JWT implementation, no password hashing setup. User management works immediately.

Create tables in your provider's dashboard (Supabase Table Editor or Firebase Console), then use the ShipStack API to interact with them:

Insert data: POST https://api.shipstack.codes/api/db/projects Body: { "data": { "name": "My First Project", "owner_id": "user-123", "plan": "free" } }

Query with filters: GET https://api.shipstack.codes/api/db/projects?owner_id=user-123&order=created_at.desc&limit=10

Update: PUT https://api.shipstack.codes/api/db/projects/project-456 Body: { "data": { "plan": "pro" } }

Delete: DELETE https://api.shipstack.codes/api/db/projects/project-456

Every CRUD operation is a single API call. Filters, pagination, and ordering work out of the box.

Upload a user avatar: POST https://api.shipstack.codes/api/storage/avatars Body: (multipart form data with the file) Response: { "url": "https://...", "signedUrl": "https://..." }

List files in a bucket: GET https://api.shipstack.codes/api/storage/avatars

Delete a file: DELETE https://api.shipstack.codes/api/storage/avatars/avatar-123.jpg

Signed URLs are generated automatically for secure access. You don't need to configure CORS, bucket policies, or CDN settings — the provider handles it.

Since ShipStack is a standard REST API, you can use it from any frontend framework with fetch() or axios. There's no SDK to install:

In a React component, a simple fetch call handles login, data queries, and file uploads. The API returns standard JSON responses.

This approach has a massive advantage: your frontend code is completely framework-agnostic. The same API calls work from React, Vue, Svelte, Angular, React Native, Flutter, or even a plain HTML page.

Your SaaS backend is now production-ready. You have user authentication, database CRUD, and file storage — all accessible through a single API. Total time: under 10 minutes.

Now that your backend is running, you can focus on what matters — building features that make your SaaS valuable. As you grow:

- Rate limiting is built in. Configure per-tenant limits to enforce free, pro, and enterprise tiers. - Usage analytics track every API call. Use this data for billing, monitoring, and optimization. - Provider swap is a config change. If you outgrow Supabase, switch to Firebase (or vice versa) without touching your frontend. - Multi-tenancy lets you create isolated environments per customer — essential for B2B SaaS.

You just went from zero to production-ready SaaS backend in under 10 minutes. No server to maintain. No infrastructure to manage. Just an API that works.