Meridian Payments Platform
Rebuilt a legacy payment gateway into a real-time, PCI-DSS compliant platform processing $2.1B in annual transaction volume.
Meridian Financial's 12-year-old payment gateway was hitting throughput ceilings during peak periods, with a monolithic architecture that made compliance updates slow and risky. Transaction failures during Black Friday 2024 cost an estimated $4.3M in lost revenue.
We decomposed the monolith into event-driven microservices, each independently deployable and testable. The payment processing pipeline was rebuilt with idempotent operations and circuit breakers. A new real-time monitoring layer provides sub-second anomaly detection.
The new platform processes 15,000 transactions per second at peak — 3.2× the previous ceiling — with zero downtime deployments. PCI-DSS recertification, previously a 6-week manual process, now runs as an automated compliance-as-code pipeline.
“CAAT 11 didn't just rebuild our gateway — they gave us an architecture we can actually evolve. The engineering discipline was evident from week one.”