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System Design for Beginners: Build Scalable Backend Systems (Udemy.com)

Learn system design basics with APIs, databases, caching, proxies, load balancers and real interview examples.

4.2
230 reviews

Created by: Hayk Simonyan

Last updated June 2026

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What you will learn

  • Design scalable backend systems using real-world system design principles.
  • Understand how backend systems are architected and what makes them scalable.
  • Learn how production apps are structured, from compute to storage to networking layers.
  • Apply design requirements like scalability, reliability, and maintainability to real systems.
  • Master networking essentials like DNS, TCP/IP, and how data flows through systems.
  • Understand horizontal vs vertical scaling and how to eliminate single points of failure.
  • Design and optimize RESTful APIs, choosing the right protocols and security layers.
  • Use caching strategies, CDNs, and signed URLs to reduce latency and scale apps.
  • Compare SQL vs NoSQL databases and understand when to use each one.
  • Learn how transactions work and apply ACID principles to ensure data integrity.

How it compares

Against the other 518 rated Udemy courses in Software Development on CourseDuck:

  • Rating4.2 out of 5higher than 10% of them
  • Reviews230#319 of 519 by number of reviews
  • Length2.4 hoursshorter than 86% of them
  • Last updatedJune 2026more recently than 77% of them

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Course Description

System design is one of the most important skills for any backend or full-stack developer — but most tutorials are either too advanced or too abstract. This beginner-friendly course is designed to help you build a strong foundation in system design by focusing on real-world concepts used by top tech companies.

You’ll start with the basics: how modern web apps are structured, what makes a system scalable, and how production architectures are actually built. Then we’ll dive into the key components of backend systems — covering networking essentials, APIs, caching, CDNs, proxies, databases, and load balancing.

You’ll learn how SQL and NoSQL databases work, what ACID properties mean, how to scale reads and writes, and when to use object storage like BLOB. I will also explain CI/CD pipelines, MapReduce, and how big data is processed at scale in distributed systems.

By the end, you’ll not only understand how to design backend systems, you'll also be ready to tackle common system design interview questions like designing YouTube, Twitter, or a file storage service.

Whether you're a junior developer, bootcamp grad, or mid-level engineer, this course will give you the practical, job-ready knowledge you need to grow your backend skills and build better systems.
Read More All Levels All Levels product length iconTime: 2.4h

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Instructor Details

Hayk Simonyan

I help fullstack developers break out of the mid-tier trap and scale into multi six-figure remote careers. As a senior fullstack developer earning a six-figure remote income, I’ve refined a system that focuses only on what top employers and high-paying clients care about: advanced real-world projects, system design mastery, and interview performance at the highest level. If you’re already good, my content shows you how to become exceptional, and get paid like it.

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Reviews

4.2

230 ratings on Udemy

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By Shibani P on 7/12/2026

Just reading slides , useless course

By Narendra Kumar Panchal on 7/6/2026

Definitely course is easy to understand but one thing for sure is most of this already you made is already public on youtube, still thanks as this course opens the the brain to think more, we can watch it on youtube but still a lot of hard work behind it I appreciate it. Thank you

By Adrian.Udemy on 5/21/2026

Overall very good, however the narration was 'challenging' (the narrator doesn’t breathe).

By Mayur Halai (IKS SRE EU) on 3/5/2026

Course was less engaging, more like just reading slides. There was little reasons behind design choices. On the positive side, Tutor showed how to calculate non-functional requirement based on a simple statement.

By Marina Primosch on 2/16/2026

This was a nice concise recap of major system design aspects. This is great for non-technical audience, or audience without prior IT experience. There are no code components, and everything is very high level. I liked the monotone voice of the instructor, and was able to focus and complete the course.

By Sergio Villegas on 1/20/2026

Bueno explicando conceptos por encima aun que no entra mucho en detalle

By KOLOGO B Josias Yannick on 12/9/2025

I've already learned a lot with the first lectures. Awesome course. Keep it going.

By Alaakhattab on 10/19/2025

i really enjoyed this course! the instructor explains how systems work in such a simple and clear way, taking u step by step through every concept. it really helped me think about system design from a wider perspective and understand what to consider in future projects, thank u so much for the great effort and valuable content!

By Makaranuol on 7/31/2025

The course is very good for devs who just get started into their career. it gives you information on how the dot is connected, how system communicate and how to design a scalable system

By Lilly Collins on 5/30/2025

This was exactly what I needed man! You took all the scattered system design concepts I kinda knew, like load balancing, caching, sharding and finally connected them in a way that made sense. Before everything felt abstract and isolated, but this course made it all click. Thank you very much Hayk!!!

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Overall Score : 84 / 100

System Design for Beginners: Build Scalable Backend Systems
Visit course on Udemy Write a review
  • Video Duration: icon 2.4h
  • Price: $19.99
  • Provider: icon Udemy
  • Updated: icon June 2026
  • Level: All Levels All Levels
  • Language: icon English
  • Certificate: icon Yes
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