Quân Lê Đình

I’m a product-minded Software Engineer specializing in Node.js and scalable e-commerce systems. I focus on reliability, real user impact, and continuous improvement across both backend and full-stack work.

Most recently, I contributed to a monolith-to-microservice migration using a NestJS monorepo, implementing CQRS with SQS for async messaging. I designed and optimized MongoDB schemas with MikroORM/Mongoose (including complex aggregation queries), and improved product search using Algolia.

Previously, at Telio, I owned critical downstream microservices (order, inventory, FAST accounting integration) and built GraphQL/RESTful APIs with Express.js/NestJS. I applied event-driven architecture with Kafka for placement and delivery flows, using Debezium and Monstache for change data capture.

I also care about craft and collaboration: I integrated Elasticsearch + Logstash for search/analytics, partnered with DevOps on CI/CD and Kubernetes, and kept strong test quality with Jest and Mocha. Outside core roles, I built projects like Njinet (real-time collaborative graph visualization with Socket.IO/LLM agents) and led a frontend intern team.