On this page
What we check early on FinTech: Realtime 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
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.
Build checklist we actually use
Ignore the buzzwords. For FinTech: Realtime Systems Guide, the hard constraint is usually data ownership or ops capacity — not how many features fit on a roadmap slide.
Failure modes we keep seeing
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.
How we measure rollout
Instrument the happy path and the ugly path. Silent failures are what turn a launch into a weekend incident.
We update this when delivery patterns change on live client work.