
Led the biggest open-source Next.js Pages Router → App Router migration across 160+ PRs
Delivered 100+ performance and reliability improvements: replaced legacy data-fetching with server-side rendering and RSC-level caching, eliminated barrel file imports to reduce client bundle size, implemented build-time i18n bundling, and fixed false positive error codes for an accurate production monitoring system
Straightened the dependency graph across a large TypeScript monorepo (5+ core packages, 700k+ LOC) by eliminating circular dependencies in 40+ PRs, redesigning the package architecture to enforce domain-driven boundaries with clear dependency direction, and authoring custom ESLint rules to prevent regressions — enabling independent package compilation and faster CI