Start practising

What to say, and when.

A free practice room for senior software engineering interviews. Pick a round, start its clock and talk it through out loud. Then see where your time went, where you went quiet, and how fast you spoke.

Start with the 60-second pitch Read the free sample

No sign-up. Your recording stays in your browser.

Estimate05:00 to 10:00 of a system design round

Practise the delivery, not just the answer.

Most candidates who fail a senior loop knew enough to pass it. They lost on delivery: they drew before agreeing what to build, coded in silence, or ran out of time.

  1. Pick a round

    Six rounds of a real loop, from the one-minute pitch to an AI-allowed coding round, each with its minute-by-minute plan from the playbook.

  2. Talk it through against the clock

    The interviewer's questions arrive on time, read aloud if you like. Move on when you're ready; the dial shows when you run over.

  3. Read your report

    How much of the round you spent talking, your longest silence, your pace, your filler words, and the time each phase took against the plan.

An example report strip, not a real candidate: talk and silence across a 45-minute system design round, coloured by phase. The gap in the deep dive is where they went quiet.

Six rounds, one loop.

Start with the pitch. Finish a round to open the next one. Every level is free.

    Finishing a round means reaching its last phase after at least half its time. Progress is saved in this browser, or in your account if you sign in.

    Watch a full round first.

    Loop Ready's mock interviews replay reported rounds in our own words. They use an AI avatar of the channel's owner, in the owner's voice.

    Uber system design mock interview: stock price alerts

    A full 45-minute plan, played out. Pairs with level 2.

    ₹1 crore package in India? Uber's system design interview

    All videos on YouTube

    50 million alerts, one price tick: which ones fire?

    Can you push each alert exactly once? Say this instead

    9:15, the market opens and alerts flood in. What breaks?

    Videos play from YouTube only when you press play.

    Cover of The Interview Delivery Playbook A page from the free sample: the 45-minute plan

    The Interview Delivery Playbook

    The full plan behind every round in the practice room: what to say in each phase, the mistakes that lose the round, and checklists to mark your own recorded mock against.

    ₹299one time, PDF

    19 chapters, 244 pages, A4. Read it on a phone, tablet or laptop, or print the checklists.

    Get the PDF for ₹299 Read the free sample

    The store isn't open yet. The free sample is the whole 45-minute plan for a system design round, six pages, as it appears in the book.

    • Switch without quitting
      5 chapters
    • System design
      5 chapters
    • Coding
      1 chapter
    • Low-level design
      1 chapter
    • Behavioural
      5 chapters
    • The new loop and the offer
      2 chapters

    Questions

    Is the practice room free?

    Yes. Every round and every level is free, and you don't need an account. Signing in with Google is optional and only keeps your progress across devices. The playbook is the paid part.

    Does my recording leave my device?

    No. The recording and the talk-and-silence analysis run in your browser and are never uploaded. Live captions are different: they use your browser's speech service, which in Chrome sends your audio to Google. Turn captions off to keep everything on your device.

    How do levels unlock?

    Finish a round to open the next one: reach its last phase after at least half its time. Progress is kept in this browser; sign in with Google and it follows you to any device.

    What's in the book that isn't here?

    The practice room gives you each round's timings and the interviewer's side. The book has what to say in each phase, worked examples, the mistakes that cost the hire, and checklists for reviewing a recorded mock.

    Can I get a refund?

    See the refund policy.