“Flawless code that the candidate cannot explain is not proof of skill; in my experience it often means they copied, got help, or used generated code without understanding it. I always ask candidates to walk me through their own work line by line, because that is where you see how they actually think.”
“I would not hire them. At Tacnique and Ajackus I watched too many perfect submissions fall apart in production because the person could not reason through their own choices when context changed. Code that ships is code someone can defend under pressure.”
“I understand the assessment: the code works, but the person can't explain it. That tells me they wrote something they don't own. Maybe they copied it, maybe they cargo-culted it from Stack Overflow, maybe they were pattern-matching without grasping the mechanics underneath. The risk is they'll break it the moment the context changes and they can't debug what they don't understand.”
“I pass on that one. Code without explanation is just code; I've never hired anyone who couldn't talk through what they shipped.”
“Flawless code without the ability to articulate it is a red flag for two reasons: either the code wasn't actually theirs, or they can't own their own work. Both break the interview later. I can teach someone syntax, but I can't fix the gap between doing the work and being able to talk about it. If you can't explain a line you wrote, the problem isn't the code—it's whether you understand what you built.”
“I've seen this exact pattern. A startup founder told me candidates were shipping projects they literally built themselves but couldn't walk him through a single design choice—and then I started looking at what flawless code actually signals about understanding. Built Anti-Soy specifically because of it: the gap between looks good on paper and actually understands what they built is the real hiring signal.”
“I've hired people who wrote flawless code but couldn't explain it. The code was real. Understanding it wasn't. That's the moment I learned that shipping code and understanding systems are different skills entirely—and I stopped conflating the two during interviews.”