Hello, I'm Diego Martín Lafuente, an engineer, designer, and writer in Barcelona working as Director of Engineering.

I write about business, design, history, technology, and other topics.

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Technology

The Interview Starts Before the First Question

Jun 14, 2026

After interviewing more than a thousand engineers over 27 years, I have learned that great hiring is not about clever questions, resume theater, or gut feeling. It is about structure, signal, preparation, and the ability to separate people who can merely make things run from people who can actually think, design, debug, and own complex systems. This article is a practical, opinionated guide for interviewers and candidates who want engineering interviews to be less random, less theatrical, and far more useful.

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