- Developed a B2C chat app using React Native, Next.js, and WebView, integrated with LINE API. - Developed a feature for LINE account binding through QR code scanning, utilizing LIFF for streamlined user authentication. - Implemented end-to-end testing with Cypress, ensuring enhanced quality assurance and reliability. - Crafted customized scripts for user tracking, installed on customer websites to monitor and analyze user behavior.

- Developed a scheduling feature for a B2C reservation system using Vue and Vuetify, optimizing the permission system's structure. - Built APIs for a reservation system with Node.js and Sequelize, streamlined inventory and scheduling systems, and integrated payment processing. - Created a reservation client platform using React, Chakra UI, Redux, and LIFF, focusing on system logic efficiency. - Developed an internal system with Svelte and XState, streamlining customer data management for staff efficiency.