DEV Community: D J

Technical Interview Anxiety — Why You Know the Answer But Can't Say It

D J — Wed, 29 Jul 2026 18:32:51 +0000

Two people I know recently told me the same thing independently.

Both developers. Both competent. Both said the same thing — they knew the answers in interviews but couldn't get the words out (Just like me). The knowledge was there. The ability to articulate it under pressure wasn't.

This is more common than people admit because nobody wants to say it out loud. It sounds like an excuse. But it's not — it's a real and specific problem that has nothing to do with how much you know.

Why it happens

Your brain works differently under pressure. When you're relaxed you can access information fluently. When someone is staring at you waiting for an answer, a different part of your brain takes over. Fight or flight kicks in at a low level. Recall becomes harder. Words feel further away.

Add to that the fact that most developers spend their working lives writing — code, comments, Slack messages, documentation. Speaking technical concepts clearly and fluently is a genuinely different skill that most developers never practice.

The preparation trap

The standard advice is to study harder. Read more documentation. Do more LeetCode. Know your stuff inside out.

But if the problem isn't knowledge — it's articulation under pressure — then studying harder doesn't fix it. You can know something perfectly and still stumble when asked to explain it to someone who's evaluating you.

The only thing that fixes an articulation problem is practicing articulation. Out loud. Under something that feels like pressure.

What actually helps

Speak your answers out loud when you practice. Not in your head. Not typed into a notes app. Actually say them.

Record yourself. It's uncomfortable. The first time you hear yourself explain a concept you'll notice immediately where you lose the thread, where you use filler words, where your explanation falls apart. You can't hear that by reading.

Do it repeatedly. The discomfort of speaking under pressure reduces with exposure. The first time feels awful. The tenth time feels manageable. The fiftieth time starts to feel normal.

Why I built DevPrep.app

I built it because I experienced exactly this — knowing the answer and not being able to say it clearly when it mattered. The AI asks you a question out loud, listens to your spoken answer, gives feedback and asks follow-up questions.

If you've got interviews coming up and this resonates — devprep.app, free tier available.

I couldn't find the right technical interview practice tool so I built my own

D J — Wed, 22 Jul 2026 14:57:26 +0000

I spent a while looking for a good technical interview practice tool. The options out there are solid but they all fell into the same pattern you read a question, type an answer, get some feedback.

Useful for knowledge. Doesn't prepare you for the experience of speaking in an interview.

The tools that do use voice are either expensive, require scheduling with another person, or have long wait times. I wanted something I could open at 10pm and just practice.

So I built DevPrep.app.

The AI asks you a question out loud, listens to your spoken answer, gives feedback and asks follow-up questions. No waiting, no scheduling, no typing. Just open it and practice speaking.

What it covers

500+ flashcard questions to practice across Azure, C#, React, TypeScript, Docker, Kubernetes, Python, SQL, Terraform and more.Then try an interview. Progress tracking, review mode, works in your browser on desktop and mobile.

devprep.app

Voice Interview Prep for Developers Why Typing Your Answers Isn't Enough

D J — Wed, 22 Jul 2026 13:46:58 +0000

I've watched developers who clearly know their stuff completely fall apart in interviews (me being one of them). Not because they didn't know the answer they did. They just couldn't get it out of their head and into words under pressure.

It's more common than people admit.

The problem is how most of us prepare. We read docs, do LeetCode, maybe write answers in a notes app. All of that builds knowledge. None of it builds the ability to speak confidently when someone is staring at you waiting for an answer.

It's a different skill

Typing an answer and speaking one are not the same thing. When you type you can pause, delete, restructure. You have time. When you're in an interview you have to think and talk at the same time, stay on track when you lose your thread, and sound like you know what you're talking about even when you're figuring it out as you go.

The only way to get better at that is to actually do it. Out loud. Repeatedly.

What I did about it

I built DevPrep.app because I kept finding myself in interviews where I knew the answer but couldn't say it clearly. The AI asks you a question out loud, listens to your spoken answer, gives feedback and asks follow-ups. It feels closer to a real interview than anything else I tried.

It covers Azure, C#, React, TypeScript, Docker, Kubernetes, Python, SQL, Terraform and more. Free tier, works in your browser.

A few things that actually help

Record yourself. It's uncomfortable. Do it anyway. You'll hear filler words and unclear explanations you'd never notice otherwise.

Practice your worst topics most. Everyone has a weak area they avoid. Interviewers always seem to find it.

Explain it simply. If you can explain a concept to someone non-technical, you can explain it to anyone. Clarity beats jargon.

Time your answers. Aim for 90 seconds to 2 minutes. Too short seems unprepared, too long loses people.

Don't script it. Learn the 3-4 key points per topic and practice hitting them naturally, not word for word.

The honest truth

The developers who interview well aren't always the most technically skilled. They're the ones who've practiced saying their answers out loud enough times that it stops feeling weird.

That's really all it is.

devprep.app

I built a two-way AI voice interview simulator — here's why typing your answers isn't enough

D J — Sun, 12 Jul 2026 08:14:29 +0000

I noticed a pattern preparing for technical interviews. I could write perfect answers to questions. But saying them out loud, under pressure, felt completely different.
That's when I realised most interview prep tools train the wrong skill.

Typing and speaking are completely different skills
When you type an answer you can pause, edit, reorganise. When you speak you have to think linearly, stay coherent, and keep going even when you lose your train of thought. Most interview prep tools train the first skill. Real interviews test the second.

So I built DevPrep.app.

How it works
The AI acts as a technical interviewer. It asks you a question out loud. You speak your answer. It transcribes what you said, evaluates it, gives feedback, and asks a follow-up — just like a real interviewer probing deeper.
Not speech-to-text into a text box. A genuine two-way voice conversation.

The tech stack
ASP.NET Core 7 backend
React + TypeScript frontend
Azure OpenAI GPT-4o for question generation and evaluation
Web Speech API for desktop, Azure Cognitive Services for mobile
Azure Container Apps + Static Web Apps
Stripe for subscriptions

500+ flashcards included
Covering Azure, C#, React, TypeScript, Docker, Kubernetes, Python, SQL, Terraform, Git, Node.js and more. With progress tracking, review mode and session history.
What I learned building it
Getting GPT-4o to behave like a real interviewer was the hardest part. Early versions were too forgiving. Real interviewers push back and probe weak answers. Getting that behaviour consistently took a lot of prompt engineering.
Mobile was the second challenge — Web Speech API doesn't work reliably on mobile so I implemented Azure Cognitive Services Speech SDK for mobile users.
Try it
Free tier at devprep.app — no credit card required, works in your browser.
Would love feedback from anyone who's been through technical interviews recently.