---
title: "AI is forcing junior engineers to think like seniors"
description: "AI can write the code in seconds. Judgement is what remains and it has become a day-one skill for junior engineers."
pubDate: 2026-07-17T00:00:00.000Z
---
I've been mentoring junior software engineers for over a decade. The advice I gave a junior engineer in 2014 is not the advice I'd give one in 2026.

Back then, my focus was on helping them write better code:

- How to structure a class
- How to name variables
- How to split functions
- How to debug
- How to think incrementally
- How to make my coffee (that one was originally for interns, but I figured juniors would benefit from it too)

Today, AI can do most of that in seconds. But something else has become much more valuable: **judgement**.

With AI, almost everything is possible. That doesn't mean everything should be done. The question has shifted from *Can you build it?* to *Should you build it this way?*

It is a much more senior question.

An AI coding agent can generate thousands of lines of code before lunch. It cannot know why the team chose this architecture three years ago. It doesn't know that a seemingly harmless shortcut bypasses an important business rule. It doesn't know that this abstraction already exists in another service. Unless you tell it, or take the time to document it for the next time this code path is modified.

That's why the engineer's role is changing, and even more so for junior engineers. Your value is becoming your ability to steer the agent:

- Provide the right context; understand and explain the architectural constraints through [ADRs](/posts/engineering-hygiene-in-the-age-of-ai-agents).
- Give the agent access to the latest documentation with tools like [Context7](https://context7.com/).
- Recognize when AI introduced duplication, unnecessary complexity, or a subtle regression.

Ironically, AI is making engineering fundamentals more important, not less.

The better your engineering practices, the better your AI coding agents perform, and the better a junior developer can step up into this new role, the one that was never taught at school. As a side note, I believe schools will have to teach more infrastructure fundamentals and software development practices, not just how to code. Schools have to drop the narrative that "XYZ is just a tool, or a methodology, you'll learn it when you need it." That's wrong. AI has shaved off most of what we considered the basics. We need to go one layer up the stack, into developer tools and DevX. But that's for another article.

When I mentor junior engineers today, I spend less time teaching syntax and more time teaching **judgement**:

- How to question an implementation.
- How to review AI-generated code critically.
- How to understand why the system looks the way it does before asking AI to change it.

Because AI doesn't remove the need for senior engineering. It asks every engineer to think like one from day one.