🚀 PayFlow — Production-Grade Fintech Backend System
🧩 Overview
PayFlow is a scalable, microservices-based fintech backend system that enables secure wallet management, transaction processing, and AI-powered financial insights.
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🏗️ Architecture
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⚙️ Features
• 🔐 JWT Authentication (centralized at API Gateway)
• 💰 Wallet system with ledger-based transactions
• 🔁 Idempotent APIs for safe retries
• ⚡ Redis caching for performance optimization
• 🚦 Rate limiting using token bucket algorithm
• 📩 Event-driven architecture using RabbitMQ
• ♻️ Retry + Dead Letter Queue for failure handling
• 🧠 AI-powered transaction categorization & insights
• 🐳 Fully Dockerized microservices setup
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🛠 Tech Stack
• Java, Spring Boot,Hibernate
• Spring Cloud (Gateway, OpenFeign, Eureka)
• MySQL
• Redis
• RabbitMQ
• Docker & Docker Compose
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🚀 Getting Started
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Clone repo
https://github.com/Divyanshu9151/PayFlow-System.git
cd PayFlow-System
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Run System
docker-compose up --build
📌 Key Learnings
• Built production-grade microservices architecture
• Implemented concurrency handling and idempotency
• Designed fault-tolerant distributed systems
• Integrated async messaging and caching layers
👨💻 Author
Divyanshu Anand