How I built a high-performance Chinese learning platform with 100k+ TV clips using Rust and Next.js 15

Hi dev.to community! 👋

Today, I’m incredibly excited to share MandarinClips, a side project I’ve been pouring my soul into. It's a high-performance language learning platform that indexes and organizes sentence-sized dialogue segments from authentic Chinese movies and TV series to help language learners transition from sterile textbooks to real-world immersion.

Here is a deep dive into the engineering decisions, performance bottlenecks, and the technical architecture that powers the platform under the hood.

I wanted the platform to be blindingly fast, cost-effective, and highly available. Here is the stack:

Frontend: Next.js 15 (React 19) + Tailwind CSS + next-intl (for multilingual support).