QR Code Payment Integration - Real-Time Order Management

Jun 15, 2024

Modern restaurant systems need real-time payment solutions that are fast and reliable. When we developed a QR code-based payment integration, the system later expanded with menu synchronization and order processing, becoming a comprehensive order management system.

The Challenge

The integration needed to handle:

  • QR code-based payments
  • Menu synchronization
  • Real-time order processing
  • High transaction volumes
  • Reliable messaging

Our Architecture

Backend: NestJS Microservices

Using NestJS microservices architecture, we isolated payment, menu, and order management logic. This enabled:

  • Independent development and deployment
  • Better scalability
  • Easier error handling

Real-Time Communication

Using WebSocket, we implemented real-time bidirectional communication, ensuring instant feedback on order and payment status.

Monorepo Architecture

Using NX monorepo tools, we managed multiple projects in a single repository, ensuring code reusability and consistent development experience.

API Documentation

Using OpenAPI/Swagger, we created comprehensive API documentation, ensuring easy integration and improved development velocity.

Observability

With a combination of OpenTelemetry, Prometheus, and Grafana, we implemented comprehensive monitoring, ensuring complete system visibility.

Testing

Using Jest, we established a consistent testing framework, ensuring code quality and reliability.

The Tech Stack

  • NestJS for microservices architecture
  • WebSocket for real-time communication
  • NX for monorepo management
  • OpenAPI/Swagger for API documentation
  • OpenTelemetry for distributed tracing
  • Prometheus for metrics collection
  • Grafana for visualization
  • Jest for testing

Results

The integration successfully:

  • Handles hundreds of payments and orders weekly
  • Provides real-time menu synchronization
  • Delivers reliable order processing
  • Ensures complete observability

Key Takeaways

QR code-based payment integrations can evolve into complex systems when expanded with menu synchronization and order processing. Combining microservices architecture with real-time communication enables building scalable and reliable solutions.

The key is designing the right architecture from the start that enables future expansions without needing to rebuild the system.

Need a QR code payment integration? TechTrail builds modern solutions that scale with your business growth. Contact us to discuss your needs.