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Andrew Chadwick
Andrew Chadwick

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Using AI agents isn't magic. It's just like supervising Junior Devs

There is a weird narrative floating around that using AI coding agents is like having a flawless 10x engineer living in your IDE.

Let’s be real. If you’ve spent enough time in the trenches, you know exactly what using an AI agent actually feels like: It feels like managing a highly caffeinated, incredibly fast, but easily distracted Junior Developer.

They are amazing at a lot of things. But they also get stuck in spectacular loops, and if you don't steer them, they will confidently drive your codebase straight off a cliff.

Here is what the shift from "writing code" to "supervising AI" actually looks like.

The "Mid-Level" Strengths

When you first hand a task to an AI, it feels like you're working with a solid mid-weight dev. You can throw an entity framework model at it and ask it to scaffold out a C# controller, and it drops 200 lines of perfectly formatted boilerplate in seconds.

Need a gnarly SQL join written to untangle three legacy tables? Done. Need to map an array of objects in JavaScript without writing out a massive reduce function by hand? It nails it.

For the heavy-lifting, mundane coding tasks, the AI is a powerhouse. It never gets bored, and it never complains about writing unit tests.

The "Junior" Death Loops

But then, you hit the wall.
You ask the AI to implement a slightly complex architectural pattern, or debug a weird async race condition. Suddenly, the illusion breaks.

  • The Hallucination Loop: It confidently calls a C# method that simply does not exist in that version of the .NET framework.

  • The Apology Loop: You point out the error. It says, "You are entirely correct, my apologies!"... and then gives you the exact same broken code block again, just wrapped in a different if statement.

  • The Context Drop: It completely forgets the SQL schema you established three prompts ago and tries to query a column it just invented.

Just like a junior dev who has been staring at a bug for three hours, the AI gets tunnel vision. It loses the forest for the trees.

The New Senior Skillset: "AI Tech Lead"

This is where the actual job of a senior developer sits now. We aren't being replaced; our job titles are just shifting to "Tech Lead for an army of bots."
To get good code out of an AI, you have to use the exact same skills you use when mentoring a junior:

  • Strict Boundaries: You can't just say "build this feature." You have to say, "Build this feature, use this specific design pattern, and absolutely do NOT modify the core database context."

  • Code Review as a First Language: You spend less time writing syntax and way more time reading it. You have to spot the subtle logic flaws the AI confidently pasted into the middle of a 50-line method.

  • Breaking the Loop: When the AI gets stuck trying the same broken solution, you have to step in, clear the context, and say, "Stop. Look at the architecture. Let's try a different approach entirely."

AI isn't going to take the job of a senior developer(yet). But a senior developer who knows how to properly mentor and steer an AI agent is going to be unstoppable.

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