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Participated in system design following a microservice architecture and database design for the second version of the learning management system • Built scalable services using Node.js Nest.js), Kafka for learning, assignments, and performance reporting • Developed a scalable service using Golang to support notifications, real-time gaming, and messaging • Implemented CI/CD pipelines using Drone to deploy services with Docker on Kubernetes VNGCloud) • Developed a logging system using Elasticsearch and Jaeger • Developed a data migration tool using Golang to transfer data from the old MySQL database to the new MySQL and MongoDB databases • Developed and optimized the process of uploading questions via Word and Excel using Golang, Nats • Developed a service integrating ChatGPT API to summarize books • Collaborated with outsourced teams to develop related services and applications