A cloud-native banking platform for 2M+ users, rebuilt for 5x performance, real-time fraud detection and daily releases instead of monthly ones.
The Operational Problem
FinFlow’s monolithic core banking system couldn’t handle transaction growth. Release cycles took weeks, on-call incidents were frequent, and fraud detection ran as an overnight batch job — meaning fraudulent transactions weren’t flagged until the next morning.
Our Architectural Approach
We decomposed the monolith into domain-scoped services (accounts, payments, fraud, notifications), introduced an event-driven architecture on Kafka for real-time fraud scoring, and rebuilt the CI/CD pipeline around trunk-based development with automated canary deployments.
Measurable Results & Outcomes
- 5x: Faster platform performance
- 2M+: Active users served
- Daily: Release cadence (from monthly)
- 92%: Reduction in fraud detection latency
Technology Stack: React, Node.js, Kafka, PostgreSQL, AWS EKS, Redis