System design interview practice, by voice, on a canvas

Reading about system design is not the same as doing it out loud under questions. Here an AI interviewer gives you a company with a working system and one thing it must now do, and you design it while talking and drawing.

How does system design interview practice work here?

You choose a scenario, such as a rate limiter or a news feed. An AI interviewer states the situation by voice while a canvas shows the current system. You extend it, talk through trade-offs, pause your microphone when you need to think, and finish with a scored report and a hire call.

Choose a scenario

What you practise

The sequence real interviewers expect: clarify and scope, estimate load, sketch the API and data, draw the high-level design, then go deep on the hardest part and name the bottlenecks. The interviewer pushes back on hand-waving, such as adding a cache without saying what the key is or how it is invalidated.

Every scenario starts from a system that already exists, the way many real rounds do: you are asked how to change or scale it, not to invent a product from nothing.

How a session runs

It works on a laptop or desktop, not on a phone: the canvas and the interviewer's view of your drawing need the screen space.

You talk with the interviewer by voice, and the canvas already shows the company's system as it is today. You extend it, and the interviewer sees what you draw. A button pauses your microphone when you want to think or sketch in silence; the interviewer waits.

When the time is up you get a report: a hire or no-hire call for the level, ratings for problem navigation, solution design, technical depth and communication with a quote from your own answer for each, what to fix, and the points a strong answer covered that yours did not. Your first interview on giveinterview, of any kind, is free, and every interview report is free. After that a design interview costs credits at the same per-minute rate as a role interview, and playing duels earns credits you can spend on it.

Choosing a scenario

Junior scenarios (about 30 minutes) test sound fundamentals: separating reads from writes, caching, unique IDs. Mid-level scenarios (about 40 minutes) add queues, fan-out, ordering and delivery guarantees. Senior scenarios (about 45 minutes) add concurrency, failure and correctness under load.

In this section

Frequently asked questions

Is the interviewer a person?

No. It is an AI interviewer that speaks, listens and asks follow-up questions, using the same voice system as the role interviews on giveinterview.

What if I need time to think?

Pause your microphone, draw or think, and resume when you are ready. The interviewer waits and asks you to walk through what you drew.

How is it scored?

On problem navigation, solution design, technical depth and communication, with a hire or no-hire call for the scenario's level and a quote from your own answer behind every rating.