---
title: "Scaling Payments Without Losing a Cent"
description: "Idempotency, ledgers, and exactly-once semantics — the patterns that keep money correct as throughput grows."
url: https://akemara.com/en/talks/scaling-payments/
lang: en
author: "Ahmed K Emara"
date: 2025-11-20
lastmod: 2025-11-20
section: talks
tags: ["Payments","Databases","Distributed Systems"]
translations:
  ar: https://akemara.com/ar/talks/scaling-payments/
---

# Scaling Payments Without Losing a Cent

> Idempotency, ledgers, and exactly-once semantics — the patterns that keep money correct as throughput grows.

How to keep money correct while scaling: idempotency keys, double-entry
ledgers, reconciliation, and the failure modes that bite payment systems under
load — with patterns that hold up in production.