Payments
3 pieces of work and writing on this site touch payments.
Case studyPayment Distribution Engine30–40 min → 6–8 min per cycleCase studyFedNow ISO-20022 Message Handling3,000+ parameters, specified and validatedDecisionHow do you stop a payment being processed twice?An idempotency key enforced by a uniqueness constraint at the point of record, not a check-then-act in application code.