SaaS

A SaaS product works differently from a one-off software project: it does not end on launch day, it begins there. The subscription model, release management, per-customer data isolation and the expectation of continuous uptime shape the architecture from the start.

That is why we begin SaaS projects not with "which screens do we need" but with "what will this product be doing, and with how many customers, two years from now."

Scope

• Product architecture — multi-tenant data model, isolation of customer data, authorization and role structure
• Subscriptions and billing — plan structure, trials, upgrades and downgrades, automatic renewal and payment provider integration
• Admin panel — so your team can run customer, usage and support processes
• API and integration — so your customers can connect their own systems
• Monitoring and alerting — error tracking, usage measurement, incident notification

Scale is settled upfront

In a multi-tenant product, the most expensive mistakes are made in the data model. How customer data is separated is not a choice you can revisit later; the larger the product grows, the harder it is to migrate. Accounting for the difference between the first customer and the hundredth upfront is far cheaper than rewriting later.

The same holds for subscription logic. Plan changes, refunds, proration and cancellation scenarios are software behavior — not a sentence on a pricing page.

Security and data

In a SaaS product you host your customers' data; alongside the technical responsibility, that is a legal one.

• Authentication, session management and authorization controls
• Backups, with a restore path that has actually been tested
• A personal data processing inventory, with retention periods reflected in the product
• Where servers sit abroad, establishing the legal basis for the transfer

We settle these by working the product side and the contract side at the same time — not with a clause added at the end.

How we work

We start with a small, working version. The first target is the narrowest scope in which a real customer can complete a real task end to end. Everything after that expands according to measurement: which screens get used, where people get stuck, which request keeps recurring.

On delivery, the source code, infrastructure access and documentation are yours. Whose name the accounts are opened in is stated in the contract — so there is no argument about it later.

If you are considering an AI component, see our article on where to start.