Timeline
16 weeks, 4 sprints
Scope
Mobile, API, DevOps
Stack
React Native, Node, AWS
Outcome
+38% retention, 0.01% fraud
Problem
The client needed a global-ready payments experience with instant payouts, strict fraud controls, and analytics accessible to both finance and product teams.
Approach
- Biometric-first auth flows with fallback OTP to reduce friction.
- Event-driven ledger on AWS with PCI-scoped microservices and audit trails.
- Observability stack (OpenTelemetry + Grafana) wired into CI/CD for rapid rollbacks.
- Feature flags for staged rollouts across 18 countries.
Results
- p95 latency under 180ms during peak load.
- 99.95% SLA upheld with multi-AZ failover.
- Fraud reduced to 0.01% with layered rules + behavioral scoring.
- Analytics adoption up 2.4x among non-technical stakeholders.
Biometric auth
PCI compliance
CI/CD
Analytics
Feature flags
Observability