Is Codemia.io a Good Place for System Design Interview Preparation in 2026?
Is Codemia.io really worth it for System Design interviews?
Hello friends, if you are preparing for tech interviews, then you may know how important System design interviews are. In this highly competitive job market where everybody is a Leetcode God, it’s no longer the only thing you need to crack a Software engineering interview.
Instead, you also must have good knowledge of System design and software architecture, particularly if you are an experienced developer, to go past the first few rounds.
In the past few weeks, I have shared many articles and resources on System Design, but one thing that was missing from it was an active practice website where you can solve System Design problems like you solve DSA problems in Leetcode.
I kind of love Leetcode because it gives me joy when I solve any problem without assistant but with system design its not like that. It’s hard to understand a system design problem, and then it’s a discussion, which can be best done with two or more people.
If you are a solo learner, then you will fall asleep in 5 minutes you started reading any system design books like “Designing Data intensive Application”, or “System Design Interview - An Insider’s Guide”, which may keep you awake a bit longer.
But the point is, there is no Leetcode-like resource for System design prep, but not anymore.
Enter Codemia.io, which was created to fill this gap and allow you to practice System design problems in Leetcode style.
This website provides more than 120+ popular system design problems that you can practice system design problems like the way you would practice data structure and algorithms on Leetcode.com.
It has many free questions which you can solve and many locked questions which are available to member and you can get membership for just $69 at the moment, which is nothing but the cost of a book and definitely worth the investment. You can learn more about pricing here
Now, let’s deep dive into this brand new platform to learn System Design by solving problems and finding out what it’s worth.
They have also expanded their catalogue and added many new System design questions as well as 130+ questions on data structures and algorithms, Object Oriented Programming, and design.
They have also improved their AI features and made it much easier and effective to practice System design problems online.
Also, they now have the biggest collection of company-wide system design problems, which means if you have an interview with Amazon, you can see what questions were asked there and practice accordingly.
What is Codemia.io?
Codemia.io is a new website that allows you to practice System design problems in Leetcode style. It has both free and paid System design problems for practice.
There are total of 120+ System design questions, many of which are taken from past interviews, like designing a URL Shortener like TinyURL, designing a Chat System like WhatsApp, or a Video Stream platform like YouTube, or a Music streaming platform like Spotify.
The most important thing is that they provide a structure through which you can solve or approach a System design problem like Functional and non-functional requirements, back of envelop estimation, API Design, High and low-level design, database design, and component designs.
It also covers Object Oriented Design and Machine Learning System design, which is closely related to system design, to provide a complete preparation.
One of the best things about Codemia.io is AI feedback and quick evaluation, which gives you a feeling of accomplishment and also encourages you to correct and learn more.
You basically pick a problem, write down your solution in the structure they provide, which covers many key steps.
You then receive feedback from AI, and you can also share a solution for further feedback. This feedback loop makes learning engaging and rewarding.
Here is the link to learn more about Codemia.io — Join Codemia
How Codemia.io Helps to Practice System Design Problems for Interviews?
Here is an example of how you should approach a System design problem on interview. In this example, we will use the URL shortening problem, which is mostly asked on FAANG and tier 2 tech companies:
1. Functional
First things first, you should list functional requirements for the system (Ask the chatbot for hints if stuck.)… Yes, Codemia.io also has a chatbot that can be used as a companion while solving system design problems.
2. Non-Functional
List non-functional requirements for the system… like failover, availability, security, logging, etc
3. Capacity estimation
Estimate the scale of the system you are going to design… like how much storage you will need, network bandwidth, RAM, CPU, Servers, cost, etc.
4. API design
Define what APIs are expected from the system…
5. Database design
Defining the system data model early on will clarify how data will flow among different components of the system. Also, you could draw an ER diagram using the diagramming tool to enhance your design…
6. High-level design
You should identify enough components that are needed to solve the actual problem from end to end. Also, remember to draw a block diagram using the diagramming tool to augment your design. If you are unfamiliar with the tool, you can simply describe your design to the chatbot and ask it to generate a starter diagram for you to modify…
7. Request flows
Explain how the request flows from end to end in your high-level design. Also, you could draw a sequence diagram using the diagramming tool to enhance your explanation…
8. Detailed component design
Dig deeper into 2–3 components and explain in detail how they work. For example, how well does each component scale? Any relevant algorithm or data structure you would like to use for a component? Also, you could draw a diagram using the diagramming tool to enhance your design…
9. Trade-offs/Tech choices
Explain any trade-offs you have made and why you made certain tech choices…
10. Failure scenarios/bottlenecks
Try to discuss as many failure scenarios/bottlenecks as possible.
11. Future improvements
What are some future improvements you would make? How would you mitigate the failure scenario(s) you described above?
You can see that it’s a very detailed way to solve a problem and touches almost all parts of system design. It also comes with a whiteboarding and diagram tool, which allows you to draw diagrams, another key aspect of system design.
15 Easy System Design Problems for Interviews 2026
Codemia.io has a huge list of system design problems you can practice. They are divided into different categories like Easy, Medium, Hard, and Advanced.
You can start with easy ones first, many of them are also free, but for others you need to take a subscription, which costs around $69 per year, not that costly.
Here is a list of Easy System design problems to start with:
While a few questions from this list are absolutely free for others, you need to take a membership, but that’s worth it because you get AI feedback and also access to 75+ high-quality solutions.
You can see the full list of System design problems on Codemia here
Codemia.io vs DesignGuru.io vs Educative’s System Design Interview
Now, when it comes to comparing Codemia with other popular System design preparation websites like Design Guru and Educative, here is how they stack up with others.
You can see that Codemia.io got the highest number of system design problems, almost 120+, and the list is still growing. Compare that to a handful of System design problems with DesignGurus.
It also got interactive learning and AI feedback, which is not available yet on other system design learning platforms.
It also got a structural breakdown of the system design problem, which is probably the best thing about Codemia.io, and is also not available on other platforms.
It also has a community where you can ask questions, clarify doubts, and get your solution reviewed, which is amazing for anyone preparing for System Design.
I highly recommend joining Codemia to prepare well for System design in 2026.
Is Codemia.io really worth it?
Codemia.io is definitely worth 100% for its huge collection of System Design problems, a structured approach to solve those problems, feedback from AI for continuous improvement, and a supporting community for further learning.
I highly recommend that you join Codemia.io to anyone who is preparing for a System design interview.
It not only provides a Leetcode-style active learning platform on System design but also its AI feedback makes learning really engaging and rewarding.
It also got 120+ high-quality questions and 75+ high-quality solutions on common System design problems most asked from Google, Amazon, Apple, and other top companies.
Overall, it provides a better way to prepare for System Design Interviews. By joining Codemia.io, you can save months of study, have better retention, and achieve a deeper understanding!
It’s also very affordable, and with just $69 per year, the price is nothing compared to other System design platforms like ByteByteGo, Bugfree.ai, Design Guru, Exponent, Educative, and Udemy.
In short, a great platform for System design preparation, and I highly recommend it. If you are in a hurry, just go and join Codemia.io, and you will thank me later.
Here is the link — Join Codemia.io for $69 Now
And here is what other people are saying about this website
You can see the feedback is quite positive, and people are enjoying solving System design problems on Codemia, which is a big, big advantage for system design learners
That’s all about Codemia.io, a Leetcode-style website to learn System design for interviews. Codemia.io is 100% worth it for anyone preparing for a system design interview due to its 120+ popular system design problems, 75+ high-quality solutions, AI-driven feedback, and interactive learning experience.
It also provides a comprehensive structure that you can use to solve any System design problem. It’s also one of the rare website which is equally good for both beginners and experienced developers.
Overall, a great resource for System design interviews, and I highly recommend it. You can learn more about Codemia.io here.
Thanks for reading this article so far. If you like this review of Codemia.io, a new website for system design preparation, then please share it with your friends and colleagues. If you have any questions feel free to ask in the comments.