Emery Coxe

Lead Architect

First Dollar

Roadblock Title:

Achieving payments resiliency with idempotency

Time:

Tuesday - 2:00 PM (Windows)

Abstract:

This session will cover how to ensure the reliability of payment systems by implementing idempotency. Financial transactions at scale often face failure scenarios such as network issues, database inconsistencies, and API timeouts. At First Dollar, we’ve built a resilient, distributed ledger system backed by direct bank integrations, utilizing an idempotency framework to guarantee exactly-once execution for critical operations.

We’ll explore how idempotency is applied across different layers of fintech infrastructure, including domain-specific idempotency, idempotency logs, and recovery strategies like event replays and API retries. Attendees will leave with practical solutions to enhance the reliability of their payment systems, reduce duplicate transactions, and mitigate operational issues.

Bio:

Emery Coxe is a systems thinker and hands-on engineer, leading high-performing teams and scaling enterprise-level applications. As a Founding Engineer at First Dollar, he designs resilient payment infrastructure focused on delivering business and end-user value. Emery is based in Austin, TX, and when not working, he enjoys lifting weights, playing drums in garage bands, and spending time with his wife, two cats, one dog, and baby daughter Betsy.