How I Migrated 50,000 Users from Firebase to a Custom Backend (And What Broke Anyway)
Feb 15 · 6 min read · After my Firebase bill hit $300/month, I knew I had to migrate. But I had a problem: 50,000 downloads, ~10,000 active users, and zero tolerance for downtime or forcing password resets. Here's how I migrated from Firebase to a custom NestJS + MongoDB ...
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