I Found the “LeetCode for System Design” and It’s Awesome

Hello friends, If you’re preparing for FAANG, Big Tech, or any high-level software engineering interviews, you already know the reality:

• For Data Structures and Algorithms (DSA) → LeetCode is the undisputed king.
• For System Design → Most people feel completely lost.

You either read long, passive solution articles or watch videos that feel too high-level. There’s very little structured, interactive practice — the kind that actually builds confidence under pressure.

While I have tried many great System Design resources which are genuinely helpful like ByteByteGo, DesignGurus.io, Exponent, Educative, and Udemy, there is nothing like LeetCode.

There was a clear gap between leetcode and other platform when it comes to practice System design questions.

That’s exactly why I got genuinely excited when I discovered Codemia.io.

Master System Design Interviews Through Active Practice

After spending time on the platform, I believe it’s currently one of the strongest tools available for serious System Design preparation.

What is Codemia.io?

Codemia.io is a practice-first platform specifically built for System Design interviews. Instead of just reading theory or watching explanations, it gives you an interactive environment to actively design systems, just like you would in a real interview.

It feels like someone finally built “LeetCode, but for System Design.”

There was clear gap when it comes to practice System design and this website seems finally closed that gap.

It got tons of great System Design problems you can practice online

Why I Was Impressed

Most System Design resources suffer from the same problems:

• Too theoretical
• No structured practice
• No feedback mechanism
• Poor organization

Codemia solves these issues remarkably well.

1. Interactive Design Workspace

When you open a question like “Design a URL Shortener” or “Design Twitter”, you don’t just read a solution.

You get a clean, professional template that guides you through the entire thought process:

• Functional & Non-Functional Requirements
• Capacity Estimation & Constraints
• API Design
• Data Model
• High-Level Design + Drawing Board

You can actually draw your architecture right there — boxes, arrows, databases, caches, message queues — everything.

If you get stuck, you can request hints (similar to LeetCode), which helps you learn without spoiling the entire solution.

You can also even practice your drawing skills which is very very important on whiteboard round

2. Massive Question Bank

As of my last check, Codemia has 132+ System Design questions — and the number is growing.

Questions are categorized by:

• Difficulty level (Easy, Medium, Hard)
• Company tags (recent questions asked at Google, Amazon, Meta, etc.)

This makes preparation targeted and efficient.

3. Beyond System Design

Codemia isn’t limited to just High-Level Design (HLD). They also offer dedicated practice for:

• Object-Oriented Design (Low-Level Design / LLD)
• DSA Interview Questions

They even have a full Mock Interview section that simulates real interview conditions — timer, pressure, and all.

Who Is Codemia.io Best For?

• Software engineers preparing for FAANG / Big Tech interviews
• Developers who want structured, hands-on practice instead of passive reading
• Anyone struggling with System Design interviews and looking for a LeetCode-like experience

I highly recommend it for anyone preparing for System Design and Coding interviews. And, if you want to join now, you can also use discount code PROMOTION20 to get 20% off now.

I also recommend their lifetime plan because that provide best value and you will always need it given how important DSA and System design are.

Here is the link — 20% OFF on Codemia.io

Final Verdict

After exploring multiple System Design platforms and courses, I can say this:

Codemia.io is currently one of the best investments you can make if you’re serious about improving your System Design skills.

It bridges the gap between theory and real interview performance better than most alternatives I’ve seen.

If you’ve been stuck in the “I watch videos but can’t design properly in interviews” phase, Codemia might be exactly what you need.

P. S. — If you want to do just one thing, just go and and join, you will thank me later. They are also offering 20% discount now and you can get access for just $59 for one year, original price is $120 so you have a chance to save$60 and also learn System design better.

Codemia | Master System Design Interviews Through Active Practice

I Found the “LeetCode for System Design” and It’s Awesome was originally published in Javarevisited on Medium, where people are continuing the conversation by highlighting and responding to this story.

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