Welcome to the official home of Grokking System Design, the industry's most trusted system design interview prep. Built by Arslan Ahmad and the Design Gurus team, our courses have helped thousands of engineers land offers at Google, Meta, Amazon, Microsoft, and beyond.
Trusted by developers working at top tech companies
Grokking System Design is the flagship interview preparation framework from Design Gurus. The word "grokking" means to understand something so deeply that it becomes intuitive. That is the goal of our approach. Not memorized answers. Real intuition for how large-scale systems actually work.
The original Grokking the System Design Interview course was built by hiring managers from Google, Meta, Microsoft, and Amazon. Every question, every diagram, and every pattern came directly from real interview loops. Instead of teaching random topics, we organize everything around repeatable design patterns that show up across dozens of different interview questions.
Learn the patterns once. Recognize them everywhere. That is what makes the difference between engineers who freeze in system design interviews and engineers who confidently walk through any design problem they are given.
The complete, hands-on course that started it all. Trusted by engineers at every top tech company.
Grokking the System Design Interview is a comprehensive, self-paced course designed to help software engineers master system design interviews at top tech companies. The course walks you through the most commonly asked questions, from designing a URL shortener like TinyURL to building Uber's backend, with step-by-step architectural breakdowns, diagrams, and tradeoff analysis.
What makes this course different is the pattern-based curriculum. Instead of treating each interview question as a one-off, you learn the underlying design patterns (caching strategies, sharding approaches, consistency models, messaging patterns) that apply across many different systems. Once you see the patterns, every new question becomes a variation of something you already know how to solve.
A complete learning path from fundamentals to advanced distributed systems architecture.
Start here. Learn the core building blocks of large-scale systems: load balancing, caching, data partitioning, CDNs, proxies, messaging systems, and more. The foundation every system design interview builds on.
Start with the fundamentalsOur flagship course. A curated set of real system design interview questions asked at Google, Meta, Amazon, Microsoft, and other top tech companies. Step-by-step solutions, diagrams, and tradeoff analysis.
Enroll in the flagship courseBuilt for senior engineers. Deep architectural reviews of production distributed systems plus advanced patterns like gossip protocols, vector clocks, Merkle trees, and split-brain resolution.
Level up to senior designMaster the patterns behind modern microservice architectures: Sidecar, API Gateway, Circuit Breaker, Saga, CQRS, and more. With real-world examples and code.
Explore microservices patternsA pattern-based guide to object-oriented design interviews (OODIs). Case studies in Java and Python covering parking lots, elevators, chess, and other classic OOD problems.
Master OOD interviewsThe 23 classic design patterns explained in plain English, with examples in Java, Python, JavaScript, and C++. Build the vocabulary every senior engineer and tech lead needs.
Learn the 23 patternsPreview the most popular lessons from Grokking the System Design Interview. No signup required.
The classic warm-up question. Learn how to handle billions of short links at scale.
Photo sharing, feed ranking, and scaling a social network to a billion users.
Timeline generation, fanout strategies, and real-time delivery at Twitter scale.
Video encoding pipelines, CDN delivery, and personalized recommendations.
Real-time ride matching, geospatial indexing, and payment processing.
Real-time messaging, presence, and delivering billions of messages per day.
File sync, conflict resolution, and secure distributed storage.
Token buckets, sliding windows, and distributed rate limiting at scale.
A complete map of the concepts covered across the Grokking System Design curriculum.
Arslan is the founder of Design Gurus and the creator of the original Grokking the System Design Interview course. With years of experience as a software engineer and hiring manager at top tech companies, he built the course to teach what he actually looks for in system design interviews.
Arslan also writes the Cracking the Tech Interview and System Design Nuggets newsletters, where he breaks down interview strategy, system design patterns, and architectural case studies for over 100,000 readers.
Real reviews from engineers who used Grokking the System Design Interview to land offers at top tech companies.
"Just wanted to say thanks for Grokking the System Design Interview. It helped me immensely when I was interviewing from Tableau (very little system design experience) and helped me land 18 FAANG+ offers."
"I've completed my first pass of Grokking the System Design Interview and I can say this was an excellent use of money and time. I've grown as a developer and now know the secrets of how to build these really giant internet systems."
"The famous Grokking the System Design Interview course on DesignGurus.io is amazing. I used this for my Microsoft interviews and I was told I nailed it."
"The Grokking courses magically condense years of CS into bite-size lessons. I have tried System Design, OODI, and Coding Patterns. Honestly, these courses are godsent."
"My offer from a top tech company would not have been possible without this course. Many thanks."
"Just completed Grokking the System Design Interview. It's amazing and super informative. I've come across very few courses that are this good."
Answers to the most common questions about Grokking System Design and the system design interview.
Deep-dive guides from the Design Gurus blog to accelerate your system design prep.
Preparing for a system design interview? Learn the 25 fundamental concepts, from caching and load balancing to the CAP theorem, that anchor every design discussion.
Read the guideA comprehensive quick-reference covering fundamentals, common design questions, tips, and best practices to ace your system design interview.
Get the cheat sheetThe most common system design interview questions for FAANG and top tech roles, with clear, structured answers and step-by-step frameworks.
See the questionsJoin thousands of engineers who used Grokking the System Design Interview to land offers at the top tech companies in the world.
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