Key Achievements

• New Business 0 to 1 Leadership: Led expansion of content platform including ‘Real-time Free Consultation’, ‘Health Magazine’, ‘Health Community’ to app/web, driving new traffic acquisition
• Achieved 2M MAU: Built SEO optimization and AI RAG-based content automation system to reach 2 million traffic
• Team Leadership: Led stable sprint operations and technical decision-making as Tech Lead of 11-member squad (4 developers)

Real-time Free Consultation Service

• Service where Doctornow’s medical professionals and partner doctors answer users’ medical questions in real-time (24 hours, within 5 minutes)
• Designed, launched, and operated from scratch
• Expanded from app to web
• Grew at least 10% month-over-month since launch, achieved approximately 30K DAU
• Appeared in search results for key terms like ‘emergency contraceptive’ within one month of PC web version launch

Technical Achievements

• Search Engine Implementation (OpenSearch): Improved search quality through morphological analyzer and custom word management, achieved 1000% performance improvement compared to existing MySQL full-text index
• Adopted DDD and Transitioned to GraphQL
• App Push Optimization: Speed improvement (1 million users/10 minutes), valid token management with silent push

Point System Development

• Applied event sourcing pattern as reliability was the most critical aspect
• Referenced Woowahan tech blog, simplified to fit our needs
• Running smoothly without incidents to date