Saturday, September 13, 2025

How I Combined ByteByteGo and Codemia.io to Crack My System Design Interview in 2025

Hello guys, Preparing for a system design interview is one of the toughest challenges for software engineers. Unlike coding interviews, where the solutions are often precise and testable, system design is open-ended. You’re asked to design platforms like WhatsApp, Twitter, Spotify, URL shortener, or payment systems, and the evaluation is based on your ability to make trade-offs, structure scalable architectures, and communicate clearly. This is all easier said then done and most of the candidate froze when asked to design a real world system on interview. 

When I started my preparation journey, I quickly realized two things:

  1. Concepts and visuals matter – I needed a way to deeply understand distributed systems, caching, load balancing, consistency, and other fundamentals.

  2. Practice matters even more – It wasn’t enough to read; I had to apply concepts to real-world problems and practice under interview-like conditions.

That’s when I discovered the power of combining ByteByteGo with Codemia.io—a combination that turned out to be the secret weapon in cracking my 2025 system design interviews.


ByteByteGo: Visual Learning for Complex System Design

If you’ve ever struggled to follow a dry textbook on distributed systems, you’ll know how hard it is to retain concepts like sharding, CAP theorem, or event-driven architecture.

What makes ByteByteGo so effective is its industry-leading visual diagrams. Instead of endless theory, you get beautifully crafted illustrations that explain how real systems work:

  • How Twitter handles millions of tweets per second

  • How Uber’s matching system works

  • How to build a scalable messaging queue

The diagrams are so intuitive that they stick in your head long after reading. And in an interview setting, that’s gold—you’re able to sketch clear diagrams on the whiteboard and articulate trade-offs just like a senior engineer.

ByteByteGo’s content is curated and narrow but deep. It doesn’t distract you with unrelated topics—it focuses solely on system design, software architecture, and scalability. That’s why it was my conceptual backbone throughout preparation.

💡 Pro tip: ByteByteGo is currently offering a Lifetime Plan at 50% off. If you’re serious about system design interviews, this is easily one of the best investments you can make.

Here is the link  - Join ByteByteGo lifetime plan with 50% discount




Codemia.io: Hands-On Practice With Real Interview Problems

While ByteByteGo sharpened my theoretical foundation, Codemia.io gave me the tools to put it into practice.

The platform is built specifically for system design interview prep and has a massive library of OOP and system design problems from top companies like FAANG and other leading tech firms.

Some of the features I found most useful:

  • Practice mode with real-world problems (design Netflix, build a scalable payment system, etc.)

  • AI-driven feedback to help you refine your answers and structure

  • Step-by-step guides on approaching open-ended problems

  • Progress tracking so you can see which areas need improvement

The best part?  Codemia.io simulates the interview experience. You’re not just reading solutions—you’re building them, refining them, and learning how to communicate your design decisions.

This gave me the confidence to walk into my interviews and handle unexpected twists. Instead of freezing, I could lean on my practice reps from  Codemia.io. They are also offering 50% discount now on annual plans, good time to join. 




Why the Combination Works?

The combination works because both ByteByteGo and  Codemia.io complements each other.

  • ByteByteGo = Clarity → I understood system design concepts through visual diagrams.

  • Codemia.io = Application → I practiced applying those concepts to real-world problems.

Together, they created the perfect prep loop: learn → apply → refine.

By the time I reached my final round interviews, I wasn’t just repeating memorized solutions—I was thinking like an architect. I could explain why I chose a certain database, how I’d handle scaling bottlenecks, and what trade-offs I’d accept.

The result? I cracked two FAANG-level offers in 2025. And honestly, I credit this preparation strategy—combining ByteByteGo for conceptual depth with  Codemia.io for hands-on practice—as the turning point.



Final Thoughts

If you’re preparing for system design interviews in 2025, don’t make the mistake of relying on just theory or just practice. You need both.

This combination doesn’t just help you crack interviews—it makes you a better engineer, capable of thinking about systems at scale.

Other System Design and Coding Interview and Resources you may like

All the best for your Software Architecture learning journey, if you have any doubts or questions, feel free to ask in the comments.

P. S. — If you just want to do one thing at this moment, join ByteByteGo and start learning software architecture fundamentals and you will thank me later. It’s one of the most comprehensive resource for coding interview now.

    By javin paul at September 13, 2025
    Labels: ByteByteGo , Codemia.io , courses , System Design

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