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System Design and AI Engineering, by Roni Das. 980 interactive lessons.
Start LearningLive 1:1 · 60 minutes · booked on Topmate
Practise the real interview before the real interview. You get a real question at your level, one hour on a video call, and the follow-up questions a real interviewer asks. Then you get written feedback: what went well, where you lost points, and what to study next.
Roni Das, senior enterprise architect and founder of systemdesign.academy
Not sure you are ready? Start with the free 15-minute readiness check.
A mock interview is a practice interview. It is built to feel like the real one. I play the interviewer. You get one real question, for example "design a chat app for 50 million users" or "how would you build search over a company's documents with an LLM".
You answer out loud and draw on a shared whiteboard. I push back and ask follow-up questions, the way a real interviewer does. In the last 10 to 15 minutes I tell you how it went.
Reading answers teaches you what is right. Only saying them out loud, with someone asking "why?", shows you where you get stuck. That is what this hour is for.
Each button opens that exact service on Topmate. You choose a time and pay there.
60-minute video call + written report
A 60-minute live system design interview, then written feedback.
60-minute video call + written report
A 60-minute live AI engineering interview, then written feedback.
Written review, no call
A written review of your resume and LinkedIn profile, within 3 days.
60-minute video call + written notes
A 60-minute review of a real architecture problem with your team.
Choose a system design or an AI engineering mock. The button opens that service on Topmate.
Pick a free slot in your own time zone. In the form, tell me the company, the role and your level.
We meet on Google Meet for 60 minutes. I play the interviewer. You think out loud and draw on a whiteboard.
You hear the main points at the end of the call. The written report reaches you within 48 hours.
A written report within 48 hours. It covers four things:
The parts of your answer an interviewer would mark as strong, so you keep doing them.
The exact moments: a missed requirement, a weak trade-off, a follow-up you could not answer.
For the same question, what a strong candidate would say and draw.
A short list of topics, in order, so your next week of practice is not a guess.
A mock interview works best when you have practised first. These help.
A practice interview that feels like the real one. You get a real question at your level, you answer out loud, and the interviewer asks follow-up questions. Then you hear, and later read, what went well and what did not.
No. The AI tutor's mock interview is practice with a computer: a free account gets a few rounds a day, and a course owner can use it as much as they like. This is a live interview with a real person on a video call, with a written report after it.
On Topmate, a booking site for 1:1 calls. Each button on this page opens the exact service there. You pick a time, fill in a short form and pay on Topmate.
Topmate shows each service in your own currency and adjusts the price for your country. The price you see on Topmate is the price you pay.
A laptop with a stable internet connection. The call is on Google Meet. For the design part, any whiteboard tool you know is fine; Excalidraw works well and is free.
In the booking form, tell me the company and the role you are preparing for, and your level. I choose a question that fits them.