payment-system

【Star us! ⭐】📦 基于Spring Boot + Redis + RabbitMQ的抖音电商平台系统，提供完整的用户管理、商品管理、购物车、订单处理等功能 | Full-featured Douyin E-commerce platform based on Spring Boot, Redis and RabbitMQ

Production-grade Digital Wallet & Payment System built with Microservices Architecture. Java 17 | Spring Boot 3 | Spring Security + JWT | Hibernate | MySQL | RabbitMQ | Docker | JUnit 5. Features: pessimistic locking, idempotent transactions, deadlock prevention, event-driven notifications, daily transfer limits.

Projeto Android (Checkout Transparente) do artigo

Distributed payment system built with microservices and event-driven architecture, leveraging Kafka for asynchronous processing and a rule-based fraud detection engine.

Offline-first UPI payment simulation using mesh networking, hybrid encryption, bridge nodes, and idempotent transaction settlement.

💳 Click Clone - Payment Backend 🚀 A Spring Boot-powered backend for a Click payment system clone, supporting money transfers, bill payments, online store transactions, and more! Secure, fast, and built with WebSockets, Redis, PostgreSQL, and Spring Security. ⭐ Give it a STAR if you like it! 🌟

Distributed payment processing simulation built with Spring Boot, Kafka, Redis, and PostgreSQL.

Secure offline payment processing system built with Java, Spring Boot, REST APIs, and Hybrid Encryption (AES-GCM + RSA).

Console-based UPI Payment System built using Java OOP concepts.

A proof-of-concept for offline payments using mesh networking, hybrid encryption, and idempotent settlement.

A full-stack Mess Bill Management System built with Java, JSP, Servlets, Hibernate, MySQL, and Maven featuring attendance tracking, automated bill generation, payment processing, and email notifications.

Java backend showcasing cryptography, distributed systems concepts, and secure offline payment processing.

A lightweight Spring Core application that demonstrates dependency injection and loose coupling through a flexible payment processing system. It showcases how multiple payment services can be easily integrated and switched using annotations and interface-based design

Secure payment gateway simulation using Spring Boot, JWT authentication, and wallet system

A Java-based console application simulating a secure Escrow / Middleman online payment system. Implementing core OOP principles (Inheritance, Polymorphism, and Encapsulation) with multi-role access control for Buyers, Sellers, and Admins.

Enterprise-inspired Payment Processing System built with Java 21 & Spring Boot 3 implementing ISO 20022 financial messaging. Features secure REST APIs, JWT authentication, payment processing, transaction management, Docker support, and a scalable layered architecture.

Transaction-based payment backend with Spring Boot, balance checks, and rollback handling

A Spring Boot based offline UPI payment simulator using mesh networking, hybrid encryption, idempotent processing, and deferred settlement.

Java implementation of a simplified UPI payment system demonstrating object-oriented design, banking workflows, transaction management, and payment processing.

A peer to peer electronic payment system based on the electronic cheque for web service.