• Using a persistence framework (Springboot, Java) to build the entire server project from scratch.

• Focusing on early database design, optimization and monitoring on Amazon RDS.

• Creating a pipeline in Python with Pandas for scarping and processing data to support business on EC2.

• Documented and tested under Jasmine.js for core Web APIs and H5 end APIs, modified redundant code, successfully accelerated 30% of response speed.

• Migrated the interfaces of app end from Yii1 to Yii2, compressed 50% of the original code, enhanced security and consistency of Android and iOS end, increased 40% of development efficiency.

• Conducted concurrent test under apache-AB, optimized database, established index and cache under MySQL and Memcached, doubled throughput keeping latency constant.

• Replaced the generation of important caches (e.g., resource on the homepage) from visiting the page to the regular generation on the server.

• Designed algorithms (e.g., content-based recommendation) to implement event recommendation.

• Reconstructed message system, reduced response time by 30%.

• Built PHP Interfaces with RESTful APIs for real-name authentication, user hierarchy system etc.

• Updated class reservation system, added functions of personal membership and group membership. (PHP in Yaf framework)

• Established gym management system, completed 30% of front-end code (Vue.js) and 70% of APIs (PHP in Yaf framework, based on RESTful API), and documented & tested APIs.