• Developed the flash sale web app with high concurrency and high availability by using Java Spring Boot
• Utilized Redis as the cache middleware and Lua Scripting to reduce the query frequency of MySQL database, prevent overselling, and avoid cache blanks at the beginning of the event
• Utilized RocketMQ as the message queue to implement peak-load shifting in processing large traffic
• Utilized Jmeter to get around 990 requests/s throughput and 0% errors in the scenario of concurrent 500,000 requests in a single machine
