Illustrative engagement. This write-up describes how we approach this kind of work. It is an anonymised archetype rather than a named client project — the figures are representative, not audited.
From founder's prototype to a multi-tenant product.
Rebuilt a demo that had accidentally acquired paying customers into a real multi-tenant SaaS — auth, roles, billing, and a data model that could take the next thousand accounts.
Enforced at the database
Tenant isolation
No human in the loop
Self-serve signup to paid
Week 3
First production deploy
The challenge
The founder's prototype had won real customers, which was the problem: every new account was provisioned by hand, tenants shared a database with no isolation, and pricing lived in a spreadsheet. Any serious security review would have ended the deal, and the team knew it.
How we approached it
Fixed the data model first — tenant scoping enforced at the database with row-level security, so isolation could not be forgotten in a query.
Replaced hand-provisioning with self-serve signup, org invites, and role-based permissions built around how customers actually organise their teams.
Wired billing to metered usage so plan changes, trials, and upgrades stopped being a founder task performed inside Stripe's dashboard.
Shipped in slices behind flags, migrating existing accounts onto the new foundation one at a time rather than in a single cutover.
What shipped
Signup, billing, and provisioning run without anyone watching, and the founder stopped being a dependency of their own product. The tenancy model held up under a customer's security review — the milestone that had been blocking their move upmarket.
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Start a project- Senior engineers, never juniors
- Weekly demos against a roadmap
- Code, infra, and docs you keep