Payment Processing

Payment Processing System - TCPWave Pvt Ltd

Role: Full Stack Java Developer
Technologies Used: Java, Spring Boot, Hibernate, JPA, Apache Kafka, PostgreSQL, AWS (EC2, Lambda, S3), OAuth 2.0, Swagger, Docker, Kubernetes

Project Overview:
At TCPWave, I developed and deployed a secure and scalable payment processing system designed to handle high-volume transactions for clients in the financial services industry. The system integrated with various payment gateways to securely process transactions and support real-time payment notifications, ensuring a seamless user experience for both customers and merchants.

Key Features:
• Payment Gateway Integration: Integrated multiple payment gateways (e.g., PayPal, Stripe, and others) using REST APIs to enable secure transactions between customers and merchants.
• OAuth 2.0 Authentication: Implemented OAuth 2.0 for secure authentication and authorization, ensuring that only authorized parties can process payments.
• Scalable Microservices Architecture: Designed and developed microservices using Spring Boot to ensure that each payment processing service could be scaled independently based on traffic and demand.
• Real-Time Payment Notifications: Used Apache Kafka to stream real-time payment status updates to customers and merchants, enabling instant transaction tracking and feedback.
• Database Integration with PostgreSQL: Integrated PostgreSQL with JPA and Hibernate for efficient data storage and retrieval of transaction data, ensuring data consistency and reliability.
• CI/CD Automation: Optimized the CI/CD pipeline using Jenkins, Docker, and Kubernetes to ensure fast, reliable, and repeatable deployment of the payment services.
• Fraud Prevention & Data Encryption: Implemented data encryption and security protocols to protect sensitive payment information, adhering to PCI-DSS standards for secure handling of credit card details.
• API Documentation: Created comprehensive API documentation using Swagger, making it easy for the development teams and clients to integrate with the payment system.

Impact:
• Reduced Payment Latency: The payment processing system reduced transaction processing time by 20%, improving the overall customer experience.
• Enhanced Scalability: The microservices architecture allowed the system to scale horizontally during peak traffic periods (e.g., holidays, flash sales), ensuring 99.99% uptime.
• Increased Security & Compliance: The integration of OAuth 2.0 and data encryption ensured the system met PCI-DSS compliance and enhanced security, minimizing the risk of data breaches.
• Real-Time Transaction Feedback: Real-time notifications provided customers with immediate feedback on transaction status, improving transparency and trust in the system.
• Seamless Integration: Successfully integrated the payment system with external systems, streamlining the payment flow and improving operational efficiency for merchants.