Secure Payment Gateway

Project Overview

This secure payment gateway was built to address the critical need for safe, reliable payment processing in modern e-commerce applications. With robust encryption protocols, comprehensive fraud detection, and seamless API integration, this solution enables businesses to process payments with confidence while maintaining the highest security standards.

The gateway features advanced security measures including PCI DSS compliance, tokenization, multi-layer encryption, and real-time fraud monitoring. Built with Java Spring Boot and PostgreSQL, it provides a scalable architecture that can handle high-volume transactions while maintaining optimal performance and reliability.

Key Features

PCI DSS Compliance

Full compliance with Payment Card Industry Data Security Standards for secure payment processing

End-to-End Encryption

Advanced encryption protocols protecting sensitive payment data throughout the transaction flow

Fraud Detection

Real-time fraud monitoring with machine learning algorithms to identify suspicious transactions

High-Speed Processing

Optimized transaction processing with sub-second response times and 99.99% uptime guarantee

Technical Implementation

Java Spring Boot Backend

Built with Spring Boot framework for robust, scalable backend services. Implements RESTful APIs with comprehensive security measures, input validation, and transaction management. The microservices architecture ensures modularity and easy maintenance.

• RESTful API design with comprehensive documentation
• JWT-based authentication and authorization
• Transaction management with rollback capabilities
• Comprehensive logging and monitoring integration

Database & Security

PostgreSQL database with advanced security features including data encryption at rest, secure connection protocols, and automated backup systems. Implements tokenization for sensitive payment data storage.

• Encrypted data storage with tokenization
• ACID-compliant transaction processing
• Automated backup and disaster recovery
• Database connection pooling for optimal performance

Payment Integration

Seamless integration with major payment processors including Stripe, PayPal, and other industry-standard gateways. Supports multiple payment methods and currencies with automatic currency conversion.

• Multi-gateway payment processor support
• Support for credit cards, digital wallets, and ACH
• Automated recurring payment processing
• Real-time payment status notifications

Challenges & Solutions

Challenge: PCI DSS Compliance

Ensuring full compliance with Payment Card Industry Data Security Standards while maintaining optimal performance.

Solution: Implemented comprehensive security measures including network segmentation, encryption, access controls, and regular security audits with automated compliance monitoring.

Challenge: High-Volume Transaction Processing

Handling thousands of concurrent transactions while maintaining data integrity and response times under 500ms.

Solution: Implemented asynchronous processing, database optimization, connection pooling, and horizontal scaling with load balancers to distribute traffic efficiently.

Project Details

Timeline

2 weeks (Architecture to Production)

Team Size

Lead Developer + Security Consultant

My Role

Full-Stack Developer & Security Architect

Technologies

Java Spring Boot PostgreSQL JWT Stripe API Docker

Security Features

• PCI DSS Level 1 Compliance
• 256-bit AES Encryption
• Multi-factor Authentication
• Real-time Fraud Detection

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