Yubo Wang Email and Phone Number

• Designed and implemented a music copyright e-commerce system, including order, product, purchase, and payment modules• Developed Back-End using SpringBoot, RocketMQ, MongoDB, and Redis, improving the payment reliability with Message Queue• Optimized the product module with Redis and CDN, and reduced the product page latency from 600ms to 400ms• The system was exhibited on Miracle Plus Demo Day and received Miracle Plus’s angel investment (300,000 $ + 500,000 ¥)

• Designed and implemented the coupon resource management feature, reconstructed the promotion and order system module with Domain Driven Design• Created an internal RPC interface with gRPC, MySQL, Redis, and Gin to process downstream requests, the system supported peak traffic of 40,000 QPS during a promotional campaign• Optimized the order system by refactoring the request to downstream services from serial to parallel, and reduced the average latency of the order service from 600ms to 400ms

• Designed and implemented a high-performance distributed online bullet screen system based on micro-service architecture• Created a live chat message package protocol and implemented the package module with Kafka and gRPC, optimizing the latency of the live chat package system from 400ms (without batch process) to 40ms• Implemented the live chat HTTP API with WebSocket and Redis, performed stress testing on the system with 50,000 QPS and 100,000 WebSocket connection with a single machine (4 Core 8 GB)