Shinkansen Platform Performance Optimization
Aug 2025 – Oct 2025 · Inbound Platform
Raised the mobile performance score from 36 to over 85.
- Context
- Frontend rendering optimization for a core product, aimed at improving search ranking and user experience.
- What I did
- Identified performance bottlenecks using Lighthouse.
- Applied rendering optimizations based on Core Web Vitals.
- Phases I owned
- VerificationRequirementsImplementation
- Team
- 2 people — 1 frontend (me), 1 PM. Frontend lead, owner of the performance effort.
- Environment
- Next.jsTypeScript
- Working language
- Japanese · English