Developed and delivered an online learning platform iteratively based on Spring Boot and Thrift RPC. Successfully led the development of the application from version 1.0 to 2.10, ensuring high-quality code and meeting project deadlines. Experienced the registered users from zero to millions.Worked closely with web developers and mobile application developers to deliver high-quality RESTful web service. Offer comprehensive API documentation using Swagger 2.Integrated cloud services APIs like social media sharing, multi-media storage, SMS, online payment, live streaming, and live chat.Designed the high available deployment system based on Jenkins and Docker.Collected and analyzed service logs based on the ELK stack.Refactored and optimized the point-to-point message service using goroutine. Improved the sending performance to 500/s per instance.Managed and monitored EC2 instances on the cloud platform, optimizing resource allocation, scalability, and availability for applications and services, reduced server instance costs by 40%

Developed car tracking system based on Netty NIO client server framework implementing a custom binaryprotocol for communicating with car trackers.Integrated the Google map with the car tracking system. Drew the route of the target's movement on the map.Refactored and optimized the car search engine by using Elasticsearch instead of the database.

Developed and maintained various open APIs like SMS, user comments, stock, and weather using Spring Boot.Migrated applications from Out-Of-Warranty CentOS server to others.Involved in auto-sending SMS application based on Windows Serial Communication(COM Ports) using RxTx library.

Participated in the development of the SMS gateway platform. Increased performance to 2000 transactions per second using Memcached.Refactored and optimized SMS status report application based on Oracle PL/SQL and trigger.Developed the official brand page and management system on top of a Twitter-liked social media using SSH2, JQuery, and HTML.