# SaaS Development: Build and Scale Your Software Product

> SaaS development from architecture to growth: multi-tenancy, billing, admin, APIs and the operations behind a subscription product — by an engineer who has built and scaled SaaS platforms.

A SaaS product is more than its main feature. Around it sit the parts every subscription business needs and nobody sells on: accounts and teams, tenant isolation, billing, roles, an admin panel, APIs, onboarding, and the monitoring that tells you something broke before a customer does.

I build the whole product, with the architecture decisions made early enough that growth does not force a rewrite.

## What a SaaS build includes

- **Multi-tenancy** — single or multi-database, chosen for your data and compliance needs.
- **Accounts, teams and roles** with the permissions model your customers expect.
- **Billing and subscriptions** integrated with your payment provider.
- **Admin and support tooling** so your team can run the product.
- **Public API and integrations** where your customers need them.
- **Operations** — deployment, monitoring, backups and scaling.

## Proof

- At Lun Startup Studio I shipped FLK, a multi-vendor SaaS, and Shogl, a freelancer marketplace, to launch.
- [CircleXO](/en/projects/circlexo) — a multi-tenant business operating system: a database per workspace, an app store and an MCP server per workspace.
- [Laravilt](/en/projects/laravilt) — an admin panel framework with a SaaS panel and multi-tenant support.
- [iStoria](/en/projects/istoria) — a platform I took over at 2.5M users and stabilised under load.

Not sure the product is proven yet? Start with an [MVP](/en/services/mvp-development). Need a system for internal use rather than a product to sell? See [custom software](/en/services/custom-software).

## FAQ

### Single database or database per tenant?
It depends on isolation requirements, data volume and how customers are onboarded. I recommend one after looking at those, and design so the choice can evolve.

### Can you take over an existing SaaS codebase?
Yes. I start with an audit of the architecture, performance and deployment, then stabilise before adding features.

### Can AI features be part of the product?
Yes — see [AI integration](/en/ai/integration) for how they are added without runaway costs.

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Source: https://fadymondy.com/en/services/saas-development