Fintech · Case study
Fintech payment orchestration layer
Problem
A fintech startup needed to route payments across multiple acquirers with failover and reconciliation.
Solution
WAAC built an orchestration service with idempotent APIs, webhook handling, and admin dashboards for ops teams.
Architecture
Kotlin services, Kafka event bus, PostgreSQL ledger, Grafana observability, PCI-aware network segmentation.
Result
Processing 2M+ transactions/month with 99.95% success rate and reconciliation time cut from days to hours.
Tech stack
KotlinKafkaPostgreSQLKubernetesGrafana