Responsibilities

• Built backend services for NEW POS, a microservices-based platform for PTT Oil and Retail Business PCL, using Node.js (Express) and MongoDB.

• Integrated RabbitMQ for event-driven communication between services, enabling reliable asynchronous processing and improving fault tolerance.

• Designed and implemented a high-volume data synchronization process to import and maintain over 1 million user records from The Revenue Department, ensuring data consistency and reliability across services.

• Leveraged ELK stack (Elasticsearch, Kibana) for log aggregation and debugging across distributed services.

• Developed frontend features using React.js, including login and landing pages to support POS operations.