5 Node.js Mistakes That Scream "Junior Developer"
This code looks perfectly clean. It passes TypeScript checks. It works on your local machine. But in production, it will crash your entire backend.
Here are 5 silent Node.js mistakes I see developers make — and the exact fix for each one.
⏱️ Timestamps:
0:00 — This clean code will crash your server
0:32 — Mistake 1: Global State Contamination (Security Flaw)
2:00 — Mistake 2: The Sequential 'await' Trap
3:24 — Mistake 3: Blocking the Event Loop
4:23 — Mistake 4: Unhandled Promise Rejections
5:04 — Mistake 5: "Cannot set headers after they are sent"
5:57 — The one that catches even seniors
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