SaaS Development: Build and Scale Your Software Product

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 — a multi-tenant business operating system: a database per workspace, an app store and an MCP server per workspace.
• Laravilt — an admin panel framework with a SaaS panel and multi-tenant support.
• 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. Need a system for internal use rather than a product to sell? See 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 for how they are added without runaway costs.