Make ten modules feel like one system.

A growing React/Next.js product surface had to stay coherent while 10+ modules evolved in parallel for a platform serving 1M+ users.

Built a shared React/Next.js component library and a type-safe REST/GraphQL API layer with NestJS — standardizing strict TypeScript, WCAG AA compliance and shared product workflows so new features could start from an established system instead of local conventions.

The architecture reduced feature implementation time by roughly 30% while creating a stronger base for cross-module development.