Introduction to Modern System Design
Define modern System Design by focusing on building reliable, scalable, and maintainable distributed systems. Explore the course’s methodology, which uses fundamental building blocks and an iterative process. This approach develops the architectural thinking needed to excel in System Design Interviews.
Understanding System Design
System Design is the process of defining components and their integration, APIs, and data models to build large-scale systems that meet a specified set of functional and non-functional requirements.
System design uses concepts from computer networking, parallel computing, and distributed systems to craft scalable, high-performance systems. Distributed systems scale well by nature. However, they are inherently complex. The discipline of system design helps us manage this complexity and get the work done.
System design aims to build systems that are reliable, effective, and maintainable.
Reliable systems handle faults, failures, and errors gracefully.
Effective systems meet user needs and business requirements.
Maintainable systems are flexible, scalable, and easy to extend with new features.
Modern System Design using building blocks
We use common design elements, such as load balancers, as basic building blocks. This approach introduces modularity and allows us to:
Discuss the specific design challenges of each building block in detail.
Focus on problem-specific logic by referencing these blocks rather than redesigning them from scratch.
We have identified 16 building blocks crucial for designing modern systems.
About this System Design course
This course teaches you to design systems that scale with user growth, remain available during faults, and meet performance goals. Real-world system building is an iterative process: you start with a baseline design, measure performance, and refine it.
We focus on core concepts rather than boilerplate solutions. By analyzing carefully selected design problems, you will learn to tackle novel challenges in interviews and real-world applications.
A fresh look at System Design: Many System Design courses offer formulaic solutions to specific problems. While attractive for high-stress interviews, this approach encourages memorization over understanding. If System Design were purely formulaic, human designers would be obsolete. Instead, we treat System Design as both an art and a science, tackling problems from first principles for a fresh perspective.
Going deep and broad: We explore traditional problems with in-depth discussions, explaining the rationale behind component choices despite their tradeoffs. For instance, we clarify why a specific database, caching system, or load balancing technique is selected.
We also address new design problems that focus on scalability, availability, maintainability, consistency, and fault tolerance. By covering both traditional and modern challenges, we prepare learners to handle any new design problem effectively. Real systems are complex, so we make appropriate assumptions to scope problems correctly and grasp real-world nuances.
Iterative process: Real systems improve through iteration. We often start simple, identify bottlenecks, and refine the design. While time constraints can limit this process, we recommend two iterations:
First iteration: Dedicate about 80 percent of the time to creating the initial design.
Second iteration: Focus on improvements and refinements.
Alternatively, you can adjust the design as new insights emerge. Discovering new details is inevitable as you spend more time on a problem.
Interactive learning: We provide ample opportunities to gain hands-on experience. Some problems guide learners through step-by-step design, while others require your input to reach a final stage. We also leverage AI to reinforce key concepts through questions and quizzes.
Let’s test your understanding with the help of the following AI assessment.
Who should take this System Design course?
System design is essential for any software engineer advancing their career.
Interview preparation: System design is a critical component of technical interviews. This course helps software engineers prepare for interviews. We also provide a comprehensive guide on preparation for a system design interview.
Software developers: This course is primarily for back-end developers, principal engineers, and solution architects who handle user data. However, full-stack and front-end developers will also benefit from understanding the broader architecture. Additionally, Site Reliability Engineers (SREs) will learn to identify the root causes of complex production issues.
Managers: Product and engineering managers must understand System Design to steer the development of scalable, performant systems.
Learners: Anyone interested in how tech giants build and evolve successful applications will find this course valuable. Especially in the AI era, where vibe coding is the norm, upskilling in System Design is paramount.
Prerequisites for this System Design course
We assume familiarity with fundamental distributed system concepts. If you are completely new to System Design, please consider taking the System Design Fundamentals course. Basic knowledge of computer networking and operating systems is also helpful.