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DemoBackendFull-Stack

Virtual Banking Microservices

Event-driven banking platform with microservices architecture, async Kafka messaging, and AI-powered conversational assistant.

Spring BootKafkaJavaLangChainDocker

The Problem

Monolithic banking backends can't scale individual services independently. A spike in transaction processing shouldn't affect account lookups or user authentication.

Architecture & Approach

Event-driven microservices with Spring Boot and Kafka for decoupled, independently scalable banking operations with OAuth2 security and an embedded AI assistant.

Key Technical Decisions

Kafka over synchronous REST for inter-service communication

Eventual consistency is acceptable for banking ledgers, and decoupling prevents cascade failures. If the notification service goes down, transactions still process.

AI agent as a separate microservice

Allows independent scaling and model updates without redeploying core banking logic. The AI service can be versioned, A/B tested, and rolled back independently.

Results

Complete banking platform with transaction processing, account management, and AI assistant.