Dunning-Kruger

Three months into my first software engineering job, I was absolutely certain I knew everything. Well, not everything. But I’d built a few projects, shipped some features, and felt pretty comfortable. When senior engineers talked about “architectural concerns” or “scalability tradeoffs,” I’d nod knowingly, thinking I got it. Then the production incident happened. Friday, 4:47 PM. The API started returning 500 errors. Users were locked out. Revenue was bleeding. My manager: “Can you look into this? You built this service.” ...

I once watched a junior developer with three months of React experience tell a senior architect with 15 years of experience that “Redux is dead and anyone still using it doesn’t understand modern development.” The senior architect smiled politely and continued the code review. That junior developer was me. And I was living proof of the Dunning-Kruger Effect. If you’ve ever wondered why the least knowledgeable people often have the strongest opinions, or why beginners sometimes appear more confident than experts, you’re about to understand one of the most fascinating cognitive biases in psychology. ...