The first ten minutes of a frontend pair interview

Most frontend pair interviews are decided before the interesting problem starts. The first ten minutes tell me whether you can set up a workspace, narrate trade-offs, and leave a trail another engineer can follow — or whether you will spend the hour fighting your tools while I wait for a signal.

I am Harry Ashton. CodePrepped is the product I built so candidates stop guessing what hiring managers actually open. This is the live-pairing companion to what I open in a take-home and what I mark in a 45-minute screen. Same hiring bar. Different clock.

Photo: Startup Stock Photos / Pexels.

I am not grading your personality

Quiet is fine. Fast talking is fine. What I need is a readable session: you say what you are about to try, you try it, you say what you observed. Silence without a plan looks like stuck. Narration without a change looks like stalling. Either can be fixed mid-call if you notice.

I am not looking for a comedy act. I am looking for evidence that a future teammate could pair with you on a production bug without guessing your next move.

Minute zero: the share

Share the window you will actually work in. Not your whole desktop with Slack badges and a calendar reminder about the interview. Not a browser with fifteen tabs of Stack Overflow already open. Editor, terminal, and the repo. If you need docs, open them on purpose and say why.

Font size matters more than candidates think. If I cannot read the code, I will ask you to zoom. That is not a trick. It is the same courtesy you would give a teammate on a projector.

Close notifications if you can. A banner that says “Interview with Acme in 2 minutes” while you are already in it is comedy. A Slack ping from a recruiter mid-thought is worse.

The first clone or open

If we start from a blank folder, I watch how you get a run script. Do you look for a README? Do you ask which package manager the company uses? Do you invent a Vite scaffold without checking the brief?

If we start from a provided repo, I watch whether you read the README before you touch src. The candidates who burn three minutes on setup usually save twenty later. The ones who skip setup often rebuild features that already exist two folders down.

Node version managers, lockfiles, and npm versus pnpm are not trivia. Naming the conflict early (“this lockfile wants pnpm; I will use that”) is senior behaviour. Fighting the wrong installer for eight minutes is not.

What I want to hear in the first ten

• A one-sentence restatement of the goal in your words.
• One constraint you will respect (accessibility, time, no new dependencies, mobile width).
• The smallest slice you will make work first.
• How you will know it worked (a visible state, a test, a network call).

That is enough. You do not need a roadmap for the whole hour. You need a first slice that cannot hide behind “almost done.”

If the brief is vague, ask one clarifying question that changes the slice. “Should this work without JavaScript?” or “Is keyboard access in scope for the first cut?” is better than five questions about colour tokens.

Red flags that are usually recoverable

You paste a solution you memorised. I will ask why that approach fits this prompt. If you can defend it, fine. If you cannot, slow down and rebuild from the requirement.

You fight TypeScript for five minutes. Say so. Cast temporarily, ship the behaviour, tighten types when the UI works. Endless type theatre with a blank screen is worse than an any you plan to remove.

You go quiet after a failing test. Read the failure out loud. Change one thing. Re-run. That loop is the interview.

You chase pixel perfection first. I would rather see a working list with ugly margins than a perfect card with no data. Say you will tidy layout after behaviour. Then actually do it if time remains.

Red flags that are hard to recover

Blaming the shared environment without trying the obvious fix. Refusing to use the company’s stack because “at home I use X.” Rewriting the brief into a different product. Asking me to decide every micro-choice so you never own a call.

Those are signals about collaboration under pressure, not about whether you know React.

One more: treating me as a search engine. “What should I use here?” every thirty seconds means I am writing your solution. Ask for constraints. Own the implementation.

How this differs from the take-home

In a take-home I open README, route map, and the riskiest interaction first. In a pair I never get that luxury of silence. Your voice is the README. Your commits or file saves are the route map. The risky interaction is whatever you choose to demo in minute eight.

If you are stronger async than live, practise the ten-minute open on a throwaway repo. Time it. Record yourself once. You will hear the stalls before a hiring manager has to.

The take-home rewards polish you can edit overnight. The pair rewards recovery speed. Both matter. Companies that only use one still hire people who fail the other format later on the job.

What “good” looks like by minute ten

Something is on screen that relates to the brief. You can point at the next risk. You have not apologised more than you have shipped. I know how you think when the path is incomplete.

That is the bar. Not perfect CSS. Not a finished feature. A session another engineer would want to continue.

If minute ten arrives and you are still installing packages, stop and narrate a plan with the tools you already have. A static HTML sketch that proves the interaction beats a half-installed monorepo.

A practice loop you can run alone

1. Pick a tiny prompt (sortable table, optimistic toggle, accessible modal).
2. Start a ten-minute timer before you open the editor.
3. Force the four sentences from earlier out loud.
4. Stop at ten even if you are mid-file. Note what a hiring manager would have seen.
5. Repeat twice a week until the open feels boring.

Boring is the goal. Interviews punish novelty under stress. You want a rehearsed start so the hard thinking is spent on the problem, not on your microphone.

How CodePrepped fits

Code Arena and the AI Trainer exist so you can rehearse that open under a clock without burning a real company’s time. The shortlist scorecard and GitHub pass cover the async side. Pairing is the live side. Practise both.

If you only drill LeetCode in silence, the first ten minutes of a frontend pair will feel like a different sport. It is. Train for the sport you are actually playing.