On this page
What we check early on SaaS: Billing Systems Guide, what usually goes wrong in production, and how teams avoid a rewrite six months later.
Who this is for
Ship a thin vertical slice, measure, then widen. Big-bang rewrites rarely survive the first month of real traffic.
Decisions that still look smart in 18 months
Ignore the buzzwords. For SaaS: Billing Systems Guide, the hard constraint is usually data ownership or ops capacity — not how many features fit on a roadmap slide.
Build checklist we actually use
Ship a thin vertical slice, measure, then widen. Big-bang rewrites rarely survive the first month of real traffic.
Failure modes we keep seeing
Ignore the buzzwords. For SaaS: Billing Systems Guide, the hard constraint is usually data ownership or ops capacity — not how many features fit on a roadmap slide.
How we measure rollout
Teams that write trade-offs down before coding burn fewer sprints when a stakeholder changes their mind mid-build. We keep ADRs short on purpose.
We update this when delivery patterns change on live client work.