PR TIMES Rich Text Editor

Built a production WYSIWYG editor from scratch at PR TIMES, Japan's largest press release distribution platform. Key achievements: • Built using React + TipTap with custom extensions • Ensured backward compatibility with 1M+ press release database • Led team of 3 engineers to modernize legacy jQuery/PHP to React/TypeScript • Launched beta achieving 8% user adoption with zero downtime migration • Optimized Core Web Vitals and implemented performance monitoring The editor handles complex formatting requirements while maintaining compatibility with a massive existing content database.