Master System Design Interviews

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Practice System Design Questions and Get Feedback

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Put this wisdom into action with our revolutionary platform. Don't just read about system design—practice it, refine it, and master it through actionable feedback.

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"Give a person a fish, and you feed them for a day; teach a person to fish, and you feed them for a lifetime." - Lao Tzu, Chinese philosopher

We don't just hand you solutions

we equip you with a conceptual toolkit to solve problems yourselves —-not just the ones we discuss.

Comprehensive Course: Dive into an all-encompassing course that covers every main aspect of system design, from fundamentals to advanced topics.
Fish for Yourself: Learn through common patterns and design templates, giving you the skills to solve not just one problem, but a sea of them.
Concepts

AI-Powered Assessments

Ever wondered if your design solution is up to the mark? Receive instant evaluations from our AI grader, taking the guesswork out of your design solutions.

Holistic Practice

We've set it up so you can practice resource estimation, API design, create diagrams, and answer detailed design questions, ensuring a well-rounded preparation.

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Engage in enriching discussions on our community forums, moderated by seasoned FAANG engineers. Learn through interactivity, not just observation.

Common Patterns, Unlimited Applications

No more reinventing the wheel for each unique challenge. Utilize our comprehensive design templates that act as a powerful foundation for solving a multitude of issues.

Real-World Code Examples

"Talk is cheap, show me the code." - Linus Torvalds, creator of Linux

Don't just read about it; experience it. Our platform offers not just blog-post theories but actual code snippets and examples that you can pull and run on your machine.

Dive into our 'Codelabs' for hands-on understanding

Forget convoluted setups; complex examples comes wrapped in a Docker container that you can easily clone and execute. This bridges the gap between theory and real-world application, making your learning journey as frictionless as possible.

Editorial Solutions with Code Implementation

Get the high level overview of the solution, then dive into the code to see how it's implemented. Whether you are a visual learner or a code learner, we've got you covered.

Essential System Design Questions for Your Interview Prep

So yeah, it's pretty awesome. But don't just take our word for it. Try a practice problem!

Design Url Shortener

Design a Url Shortener service like bit.ly

Design Rate Limiter

A rate limiter is a system is to prevent a user from making too many requests to a service within a certain time frame. This is used to protect services from abuse and can be implemented in various scopes like per user, per IP address, etc.

Design LeetCode

Design a coding contest platform like LeetCode.

Design Pastebin

Pastebin is an online application where users can store plain text. It is often used by developers to store pieces of sources code or configuration information, but anyone can essentially store any type of text. The idea behind the site is to make it more convenient for people to share large amounts of text online. Each piece of text that is pasted on Pastebin can be accessed through a unique URL

Design Realtime Monitoring System

Design a realtime server monitoring and alert system like Datadog.

Design Typeahead System

A typeahead system, often called autocomplete, is a feature in software programs that predicts the rest of a word or phrase that a user is typing. This functionality helps users to find and select from a pre-populated list of values as they type, reducing the amount of typing needed and making the input process faster and more efficient. An everyday example of a typeahead system is Google's search box. As you begin typing your search query, Google provides a dropdown list of suggested search terms that match what you have typed so far. These suggestions are based on popular searches and the content indexed by Google's search engine. This allows you to see and select your intended search without having to type out the entire term, making the search process faster and more efficient. When a user begins to type in the search box, the typeahead feature could suggest book titles, authors, or genres that match the typed characters. For instance, if the user types in "Har", the system could suggest "Harry Potter", "Harper Lee", etc. This kind of typeahead system can greatly enhance the user experience by providing instant feedback and helping users formulate their search queries. In this problem, we will design a typeahead system for a large e-commerce site. The system will provide search suggestions to users as they type in the search box. The suggestions will be based on the most popular searches and the content indexed by the e-commerce site's search engine.

Design a Comment System

Design a comment system, such as Disqus, is a feature integrated into websites that allows users to post comments on published content, interact with other users through replies, upvote or downvote comments, and sort or filter comments. This system must be robust, scalable, and efficient to handle a large volume of users and comments.

Design a Realtime Chat App like WhatsApp

Design a chat app like WhatsApp.

Design Dropbox

Design a file hosting service such as Dropbox or Google Drive. A cloud file hosting service allows users to upload, download, and share files across different platforms. It should support multiple file types including text, images, and multimedia formats. For this problem let's focus on the backend system that stores and syncs them between different devices.

Design Url Shortener

Design a Url Shortener service like bit.ly

Design Rate Limiter

A rate limiter is a system is to prevent a user from making too many requests to a service within a certain time frame. This is used to protect services from abuse and can be implemented in various scopes like per user, per IP address, etc.

Design LeetCode

Design a coding contest platform like LeetCode.

Design Pastebin

Pastebin is an online application where users can store plain text. It is often used by developers to store pieces of sources code or configuration information, but anyone can essentially store any type of text. The idea behind the site is to make it more convenient for people to share large amounts of text online. Each piece of text that is pasted on Pastebin can be accessed through a unique URL

Design Realtime Monitoring System

Design a realtime server monitoring and alert system like Datadog.

Design Typeahead System

A typeahead system, often called autocomplete, is a feature in software programs that predicts the rest of a word or phrase that a user is typing. This functionality helps users to find and select from a pre-populated list of values as they type, reducing the amount of typing needed and making the input process faster and more efficient. An everyday example of a typeahead system is Google's search box. As you begin typing your search query, Google provides a dropdown list of suggested search terms that match what you have typed so far. These suggestions are based on popular searches and the content indexed by Google's search engine. This allows you to see and select your intended search without having to type out the entire term, making the search process faster and more efficient. When a user begins to type in the search box, the typeahead feature could suggest book titles, authors, or genres that match the typed characters. For instance, if the user types in "Har", the system could suggest "Harry Potter", "Harper Lee", etc. This kind of typeahead system can greatly enhance the user experience by providing instant feedback and helping users formulate their search queries. In this problem, we will design a typeahead system for a large e-commerce site. The system will provide search suggestions to users as they type in the search box. The suggestions will be based on the most popular searches and the content indexed by the e-commerce site's search engine.

Design a Comment System

Design a comment system, such as Disqus, is a feature integrated into websites that allows users to post comments on published content, interact with other users through replies, upvote or downvote comments, and sort or filter comments. This system must be robust, scalable, and efficient to handle a large volume of users and comments.

Design a Realtime Chat App like WhatsApp

Design a chat app like WhatsApp.

Design Dropbox

Design a file hosting service such as Dropbox or Google Drive. A cloud file hosting service allows users to upload, download, and share files across different platforms. It should support multiple file types including text, images, and multimedia formats. For this problem let's focus on the backend system that stores and syncs them between different devices.
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