That AI Guy

Pillars / SaaS

SaaS products, built on iron you own from day one

From spec to a live product, with auth, billing, multi tenant data, and AI native architecture shipped from the first release, not bolted on after the third paying customer breaks something. When the product has an AI layer, it can run on the same owned hardware as everything else, instead of metering every request through a rented API.

What this pillar covers

Product engineering from MVP through production scale. A real product on day one, not a prototype that looks good in a demo and breaks under real traffic.

Most SaaS MVPs ship without billing that scales, without proper multi tenant isolation, without observability. They look fine in a demo and fall over on the third paying customer. We build the other way, with the production concerns most MVPs defer shipped from the first release: auth that handles invitations and team accounts, subscription billing with proration, tenant isolation with row level security, audit logging, background jobs, and a dashboard wired to real alerts.

Build execution runs through ThatDeveloperGuy, the sister development studio this practice is built under.

Deliverables

What you get

Auth

Team accounts, invitations, OAuth

Email, magic link, and OAuth where needed, with team accounts built in from the start.

Billing

Real subscription billing

Subscriptions, proration, dunning, and a customer portal, not a placeholder checkout page.

Multi tenant data

Row level security

Tenant scoped queries and row level security, built so one customer can never see another's data.

AI native

AI in the architecture, not bolted on

When AI is part of the product, it is designed into the core architecture from the start.

Observability

Alerts and audit logging day one

Error tracking, a dashboard, and audit logging wired in before the first customer signs up.

Marketing site

Included, schema first

The public facing site ships with the same hand coded, schema first approach as our website pillar.

What the engagement looks like

An MVP engagement is scoped to a focused feature set before any code is written, so both sides agree on what ships. Scope creep beyond that agreement is handled as a change order rather than quietly absorbed and rushed. Equity is never part of the arrangement. Cash only keeps the incentive simple: build something that works, not something that looks good on a pitch deck.

After the MVP, we typically continue as the engineering partner on an ongoing engagement through the first paying cohort and beyond, until a founder is ready to bring on a full time technical hire. See how engagements are structured for the specifics.

FAQ

SaaS questions

Is the MVP a real product or a prototype?

A real product, scoped to a focused feature set. It ships with real auth, real billing, real multi tenant isolation, and real observability, not a demo that breaks on the third paying customer.

Will you take equity instead of cash?

No. Cash only. Equity entanglement is not how this practice operates.

What about the marketing site?

Included, built with the same hand coded approach as our other website work, full schema and AEO from day one.

Who handles ongoing scaling after the MVP?

We continue as your engineering partner on an ongoing engagement. Many founders scale through their first year this way before bringing on a full time CTO.

Do you build mobile apps?

MVPs ship web first. Mobile, whether React Native or native, is scoped separately once the web product is validated.

Begin

Ready to scope a SaaS build?

See how a build is scoped and structured, or start with a readiness assessment if you are still deciding.