BackendPaymentsCardsFintechCard processingISO messaging

Sparrow

Card processing platform with direct integration into Interswitch Verve infrastructure, built for low-latency transaction routing, high availability, and compliance-grade auditability.

Challenge

Sparrow needed a card processing platform that could handle low-latency transaction routing, high availability, and compliance-grade auditability.

Solution

I developed transaction routing and authorization services for real-time card processing operations, implemented resilient timeout handling and circuit breakers for external provider communication, and built async reconciliation and settlement workflows over messaging queues.

Impact

Transaction routing and authorization services for real-time card processing operations
Resilient timeout handling and circuit breakers for external provider communication
Async reconciliation and settlement workflows over messaging queues

Tech stack

Java
Spring Boot
ISO Messaging
Messaging Queues
Circuit Breakers
Connection Pooling

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