The Last Mile of Real-Time Payments
Instant rails are live in forty countries. The hard part was never the transfer.
By Priya Menon

The transfer is the easy part
Moving a payment in under ten seconds is a solved engineering problem. Deciding what happens when it fails, reversing it, reconciling it against a ledger written by a system from 1994 — none of that got faster.
We shipped instant payments and discovered our support queue was the bottleneck.
Banks that treated real-time as a network upgrade are now rebuilding operations around it. The ones that treated it as an operations problem from day one are quietly ahead.