Juniors Stopped Writing Real Code. Now What? 🤖 vs 🧠

#ai #codereview #softwareengineering #mentorship

The trend is undeniable: Juniors are leaning hard on LLMs. They aren't just using them as assistants; they’re using them as proxies for thinking.

As a mentor in 2026, I’ve had to pivot. You can’t ban the tools, so you have to weaponize them. I mix two things that actually work: Extreme Feature Ownership + Ruthless AI Reviewing.

The Simple Rule: Explain or Delete

The workflow is non-negotiable:

Take the ticket.
Run the AI version (GitHub Copilot, etc.).
Spend 2x the time tearing it apart.

In standups and PRs, they must explain every single line. If they can't justify a logic gate or a dependency, we throw it away and redo it together. No exceptions.

The "Ruthless 5" Review Framework 🛡️

To make the review process more than just a "looks good to me," I force them to answer these 5 questions every single time:

📈 Scalability & Perf: “What happens if this hits 10K TPS or the database grows 100x?”
🚨 Security & Edge Cases: “Where does this break with malicious input or a race condition?”
🏚️ Tech Debt: “Which part of this code will bite us in 6 months? Why this specific shortcut?”
🏗️ Architecture: “Why this pattern instead of the simpler one we already have in the codebase?”
🎯 Business Alignment: “Does this actually solve the core ticket, or is the AI just 'looking smart'?”

The 90-Day Shift

In my experience, after 90 days of this "Ownership + Audit" model, juniors shift. They stop being passengers of the LLM and start becoming the architects guiding it.

The Outcome: Faster ramp-up and more robust code, even without the old-school “write every character from scratch” days.