On this page
A practical cut of Ecommerce: Realtime Systems Guide for engineering and product leads — decisions first, framework essays last.
Who this is for
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.
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
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.
Failure modes we keep seeing
Ship a thin vertical slice, measure, then widen. Big-bang rewrites rarely survive the first month of real traffic.
How we measure rollout
Use boring technology where the risk is operational. Save novelty for the one wedge that makes the product worth buying.
We update this when delivery patterns change on live client work.