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Built an AI system design tutor that actually teaches you (not just evaluates you)

Most tools I’ve tried for system design fall into 2 buckets:

• You either get a blank canvas (Excalidraw, draw.io) → you’re on your own
• Or you get evaluation tools → they tell you what’s wrong after you’re done

But in reality, learning system design is iterative. You need guidance while you’re thinking.

So I built something I wish I had while preparing:

👉 An AI tutor that sits with you while you design systems

What it does

• Guides you step-by-step through system design concepts and problems
• Adapts to your pace (fast / slow / beginner / experienced)
• Lets you ask “why this?” or “what’s another approach?” in real time
• Gives alternate architectures, trade-offs, and reasoning
• Works via voice or text (so you can use it anywhere)
• Keeps track of your progress and notes automatically

The key idea

Instead of:

>

This is more like:

>

Example flow

• You start designing a URL shortener
• Add an API → it asks: “How will you handle high write traffic?”
• You get stuck → ask for hint → it suggests caching vs sharding trade-offs
• You propose a DB → it challenges consistency vs scalability

It feels closer to a real interview prep session than a tool.

Why I built this

When I was learning system design:

• I didn’t know if I was thinking in the right direction
• Feedback always came too late
• Most “solutions” were static and didn’t adapt to me

This tries to fix that.

Would love feedback

• Does this kind of guided learning make sense to you?
• Would you prefer this over videos/text based learning?
• What would make this actually useful daily?
• The tutor framework is flexible, what other areas would you like us to cover apart from system design?

It is free to try at layrs.me/tutor-topics