- Solved mobile editor text editing and screen movement issues, enhancing mobile user engagement and session counts.- Improved usability of text editing toolboxes in mobile browsers, ensuring accessibility across Safari and Chrome.

- Led the migration to TypeScript, enhancing code readability and reliability.- Simplified state management by adopting React Query, resulting in improved code maintainability and development productivity.- Successfully removed the Container Presenter pattern, reducing project complexity and file count by over 170.- Automated ID verification using react-webcam and OCR API, enhancing user experience and reducing the administrative team's workload.

- Created a web app allowing customers to locate kiosk machines and design stickers to share with friends.- Implemented dynamic store lists based on the user's location, sorted by proximity using Kakao Map API.- Developed a kiosk service enabling customers to create custom phone skins, griptoks, and card stickers.- Connected the payment and sticker printing process.- Customized error pages and enhanced error messaging by monitoring hardware status.