FINTECH · LATENCY

Real-time Payments API: p99 latency cut 72%

-72%

A Series-C fintech processing $4.2B/yr in B2B payments needed p99 API latency under 200ms for tier-1 bank partnerships. We rebuilt the request hot-path and async compliance checks.

We profiled the synchronous compliance path, moved checks to an event-driven worker pool, and colocated read replicas with the payment gateway region.

Result: p99 dropped from 680ms to 190ms while maintaining audit-grade logging for regulators.