01 · The premise
An MVP isn't an excuse to write badly. It's a promise to scale when the market asks.
We build SaaS products as if we had to maintain them for five years — because that's often what the founder wants. Multi-tenancy, billing, auth, admin panel, observability: we don't wait for "phase 2", we design them from the first commit with the right discipline for the current stage.
The approach is pure Extreme Programming: pair-engineering on critical pieces, TDD on anything that isn't throwaway UI, CI/CD from the first push, refactor as continuous practice, simple design revisited every sprint.
We apply Extreme Contracts externally (toward the client, toward users) and internally (toward the future maintainer). Every API has explicit versioning, every schema has reversible migrations, every feature has a kill-switch.
04 · The contract
Pre-conditions, post-conditions, invariants.
Every engagement has explicit pre-conditions, measurable post-conditions, and invariants we never violate. You know what we need at the start, what comes out at the end, and what we don't negotiate in the middle.
Pre-conditions / what we need from you
- Founder or technical stakeholder available for weekly sync.
- Design system or basic visual lines (even just rough Figma).
- Explicit decision on stack constraints (e.g., preferred cloud, region, compliance constraints).
- Agreed infrastructure budget — cloud isn't free and needs sizing.
Post-conditions / what we guarantee
- SaaS live, with the first real tenants (not just demos) onboarded and billed.
- Repository, infrastructure and access owned by the client.
- Working CI/CD, live observability, written runbook.
- Formal knowledge transfer: the internal team can take the ball within 30 days.