Transaction Processing Infrastructure

A rapidly growing fintech startup needed scalable payment processing infrastructure that could handle 50x growth without architectural rebuilds while maintaining sub-second transaction times.

The Challenge

The existing system was reaching its limits:

• Processing 1,000 daily transactions but forecasting 50,000+ within 18 months
• Monolithic architecture creating bottlenecks
• No clear path to scale without complete rebuild
• Transaction processing times increasing as volume grew

Growth was being constrained by infrastructure limitations, and the team was considering a costly platform migration.

The Infrastructure Solution

Entrelix architected a distributed transaction processing infrastructure designed for exponential growth:

Microservices Architecture

Decomposed the monolithic system into specialized services that scale independently. Payment processing, fraud detection, reconciliation, and reporting each operate as separate, coordinated services.

Event-Driven Processing

Asynchronous event streaming enables parallel transaction processing. The system handles transaction spikes by distributing load across processing nodes automatically.

Intelligent Routing Layer

Smart transaction routing optimizes processing paths based on transaction type, risk profile, and system load. High-priority transactions get expedited processing while batch operations run during low-traffic periods.

Real-Time Monitoring Infrastructure

Comprehensive observability across all transaction flows. Every transaction is traceable from initiation to completion, with real-time alerts for anomalies or performance degradation.

Measurable Outcomes

Infrastructure performance:

• Scaled from 1,000 to 50,000+ daily transactions without performance degradation
• Sub-second processing times maintained at all volume levels
• 99.98% uptime across 18 months of operation
• Zero downtime deployments for system updates
• 70% reduction in infrastructure costs through efficient scaling

Business Impact

The infrastructure enabled the company to pursue aggressive growth without technical constraints. Transaction volume increased 52x over 18 months while processing times remained consistent. The modular architecture allows new payment methods and features to be deployed independently, accelerating product development.