Services

SaaS products engineered for recurring revenue

Multi-tenancy, billing, onboarding, uptime — the parts of SaaS that are invisible until they are wrong.

Building a SaaS product is different from building software once: the same codebase must serve every customer securely, bill them correctly each month, onboard them without your involvement, and stay up while you sleep. Those concerns — multi-tenant data isolation, subscription lifecycle, usage metering, self-service onboarding — are where SaaS projects quietly go wrong, and they are exactly what we have built repeatedly for European founders and companies productising an internal tool. Our Romanian team takes SaaS products from architecture to launch and then operates them: monitoring, incident response, and the fortnightly release rhythm subscribers expect. EU hosting and GDPR-conscious data design come standard, which matters when your first enterprise customer sends a security questionnaire.

Let’s talk about your project

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office@northdan.com · +40 752 070 247

What you get

Tenant isolation done right

Data separation, per-tenant configuration and fair-use limits are designed in from the first migration — retrofitting isolation later is the most expensive mistake in SaaS.

Billing that survives reality

Stripe-based subscriptions with trials, upgrades, proration, dunning and EU VAT handled — revenue plumbing that finance can reconcile.

Run, not just delivered

We operate what we build: monitoring, alerting, backups and an on-call arrangement — so “the app is down” is our pager, not your inbox.

What you have on launch day

Multi-tenant data isolation you can explain to a security reviewer, subscription billing wired to a real provider including upgrades, downgrades, dunning and tax handling, a self-service onboarding path that works without your involvement, and role-based access so customer administrators manage their own users instead of emailing you.

Around the product itself: monitoring and alerting that wakes a human before your customers notice, backups with a rehearsed restore, a staging environment, deployment automation that makes a release routine rather than an event, and usage metrics you can read commercially. These are the parts founders discover they need in month three of production, and building them later always costs more.

Frequently asked questions

Can you turn our internal tool into a sellable SaaS?

Yes — that is a common path. The work is multi-tenanting the data model, adding billing and self-service onboarding, and hardening security for strangers. We audit the existing code first and give you a realistic gap assessment.

How do you handle GDPR for a SaaS with EU customers?

EU-region hosting, per-tenant data export and deletion built into the product, a processing register, and a DPA template you can sign with customers — engineered in, not promised in a policy PDF.

What ongoing costs should we expect after launch?

Infrastructure typically starts at a few hundred euros monthly and scales with usage; a maintenance-and-iteration retainer covers releases and support. We model both against your pricing so unit economics are visible early.