Independently built the full-stack system: designed data model and built database schema, implemented GraphQL queries including handling the challenge of multi-platform unified strings and backend changes, designed web controllers and routing logic in Hack, and developed multi-step interaction flows using React and JavaScript. Additionally, developed a health monitoring dashboard and an internal tool for performance tracking and feature debugging.

Collaborated with multiple cross-functional (XFN) partners closely: worked with PM and DS to identify product needs and brainstorm ideas, partnered with UI/UX Designer to resolve design and implementation inconsistencies, and led dogfooding sessions to gather feedback from engineers and XFN teams to enhance the product.

Led the development of the web application’s instructional video section and custom content display, enhancing MySQL databases, designing backend logic with Sails.js, and creating dynamic frontend tabs, leading to a 30% increase in user interaction.

Reconstructed the product's live streaming feature using Ant Media’s WebRTC API, enabling functionalities like room joining, camera/audio toggling, and messaging, which enhanced the real-time user experience by 30%.

Led comprehensive planning and execution of the 3rd Annual Vocabulary Competition in collaboration with over 20 faculty members. Delegated responsibilities effectively and fostered team coordination, culminating in a highly successful event with 20 participants and 300+ audiences.

Pioneered the Evening English Learning Program, synchronizing with a team of 14 teachers to design customized workbooks focusing on language skills, contributing to a 46% increase in the passing rates for KET and PET tests.