System Design Fundamentals
Learn the core building blocks of scalable systems (load balancing, caching, databases, APIs) in a beginner-friendly, text-based course. From the creators of Grokking the System Design Interview.
Course Overview
System Design Fundamentals is an introductory course for software engineers and developers who are new to designing large-scale systems. It teaches the core components, concepts, and mental models needed to build scalable, highly available software from the ground up: the client-server model, load balancing, caching, databases, messaging, and more. It covers all the basics you should know before moving on to more complex topics. When you are ready to prepare for the interview, continue with our flagship course, Grokking the System Design Interview, which builds directly on the foundation you develop here. The course uses a clear, beginner-friendly approach with illustrations, analogies, and real-world examples that make each concept easy to grasp. Complex ideas like latency and throughput are explained in plain, everyday language, with no heavy jargon and no prior design experience required. Multiple quizzes reinforce what you learn as you go. By the end, you will have a firm grasp of the fundamentals, the confidence to design basic scalable systems, and everything you need to take on interview-level design challenges.
What you'll learn in System Design Fundamentals
- Learn a step-by-step approach to system design using simple mental models that help you break down complex problems.
- Find out how techniques like caching and load balancing improve a system’s performance and reliability for users.
- Grasp the concepts of scalability and availability, learning to design systems that can grow to serve more users while staying reliable.
- See theory put into practice through real-world examples and analogies that make abstract concepts easier to grasp.
- Build a solid foundation that prepares you for more advanced system design topics and courses down the road.
- Discover the roles of common system components like databases, caches, and APIs, and understand how they work together in a system’s architecture.
- Understand the client-server model and how different parts of an application (clients, servers, APIs) communicate with each other.
- Learn about latency and throughput, key performance metrics for speed and capacity, and how they affect the user experience.
- Understand design trade-offs and how to balance competing choices (e.g., speed vs. reliability) when building a system.
- Build the foundation you need before taking Grokking the System Design Interview.
Course Content
System Design Fundamentals
Load Balancing
API Gateway
Key Characteristics of Distributed Systems
Network Essentials
Domain Name System (DNS)
Caching
Data Partitioning
Proxies
Redundancy and Replication
CAP & PACELC Theorems
Databases (SQL vs. NoSQL)
Indexes
Bloom Filters
Long-Polling vs. WebSockets vs. Server-Sent Events
Quorum
Heartbeat
Checksum
Leader and Follower
Security
Distributed Messaging System
Distributed File Systems
Misc Concepts
Final Quiz
What people say about our courses
About the Author
Arslan Ahmad
Industry Expertise & Leadership
Arslan Ahmad is the lead author of System Design Fundamentals. As the founder of Design Gurus and a former FAANG hiring manager, he has worked at industry giants like Facebook (now Meta) and Microsoft.
He has conducted hundreds of system design interviews, giving him unique insight into what top tech companies look for in candidates.
The course also incorporates expertise from senior engineers at Google, Meta, Amazon, Microsoft, and Uber, ensuring you learn system design best practices from professionals who have built and scaled real-world systems.
500+
Interviews Conducted
10k+
Students Taught
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FAQs
Are there any prerequisites for System Design Fundamentals?
No, there are no strict prerequisites; this course is designed to be beginner-friendly. It starts with the basics of system design, so as long as you have basic programming knowledge, you can easily follow along and learn system design fundamentals from scratch.
Is this course text-based or video-based?
The course content is delivered entirely through text-based lessons (no video lectures). This format lets you read and learn system design fundamentals at your own pace, with clear explanations and diagrams to help beginners understand each concept.
How long does it take to complete this fundamentals course?
This course has about 20 hours of content, but since it’s self-paced, you can take as long as you need to finish. Many learners complete it in a few weeks by studying a bit each day, while others spread it out over a couple of months; the timing is completely up to you.
Does this course include quizzes or practice exercises?
Yes, the course includes quizzes at the end of sections to help reinforce your learning. These short quizzes let you apply the system design fundamentals you’ve learned and ensure you understand each topic before moving on.
Will System Design Fundamentals help me prepare for system design interviews?
Absolutely, this course is designed to help you build the strong foundation needed for system design interviews. By covering important concepts and reinforcing them with quizzes, the course prepares beginners to approach system design interview questions with confidence.
Is this the same course as Grokking System Design Fundamentals?
Yes. We renamed the course to System Design Fundamentals; the content and your progress are unchanged.
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