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The Junior Developer Pipeline Is Collapsing — And the Industry Won’t Feel the Real Cost Until 2031
AI didn’t just make junior developers less necessary. It broke the training system that turns them into senior engineers — and nobody’s built a replacement yet.
Erik Brynjolfsson’s team at Stanford’s Digital Economy Lab didn’t use surveys or LinkedIn scraping to study what AI was doing to junior developer jobs. They used ADP payroll data — the actual paychecks of millions of American workers. What they found, published in August 2025, is the closest thing the industry has to a smoking gun: employment for software developers aged 22 to 25 fell nearly 20% from its late-2022 peak. Over the same stretch, employment for workers 30 and older in the same AI-exposed fields grew 6–12%.
That’s not a story about AI replacing software engineers. It’s a story about AI replacing the entry point into being one.
The Numbers Are No Longer in Dispute
What’s strange about this particular shift in the labor market isn’t the disruption itself — tech has seen plenty of that. It’s how rarely anyone pushes back on the underlying numbers anymore. The evidence itself has largely ceased to be disputed…