Event-Driven Architecture in Financial Systems: Performance Metrics and Resilience Patterns from the Real Wallet Platform

Abstract

This article demystifies Event-Driven Architecture (EDA), a paradigm where software components communicate through event production and consumption rather than direct requests. The introduction explores EDA's conceptual foundations, historical evolution, and value proposition compared to traditional request-response models. Core components and patterns are examined, including event producers/consumers/brokers, event streams/stores, Command Query Responsibility Segregation, event sourcing, and messaging patterns. Implementation considerations cover technology stack selection, schema design, consistency challenges, error handling, and observability requirements. A detailed case study of the Real Wallet platform illustrates EDA principles in action, demonstrating how a commission payment system orchestrates complex financial workflows across specialized subsystems while maintaining loose coupling, scalability, and resilience. The article presents EDA as an architectural methods particularly suited for modern distributed systems requiring adaptability, fault tolerance, and independent evolution of components.