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Software Engineer System Design Interview Questions

Get interview-ready faster by practicing real-world software engineer System Design questions that will teach you to design scalable, reliable systems and perform like a pro.

Overview

Content

Reviews

From Amazon to Zoom, nearly every mid to senior-level software engineer interview now includes a dedicated System Design round (~45-60 minutes). Typically you’ll be expected to whiteboard a production-grade feature (think URL shortener, real-time chat, or ride-sharing dispatch) while interviewers probe areas like requirements gathering and scope control, back-of-the-envelope sizing (traffic, storage, bandwidth), component selection (databases, caches, queues, CDNs), trade-offs: latency vs consistency, cost vs redundancy and failure modes, monitoring, and rollout safety With this adaptive roadmap, you’ll lock down distributed-system fundamentals, then drill into canonical interview problems using proven frameworks to approach any software engineer system design challenge.

From Amazon to Zoom, nearly every mid to senior-level software engineer interview now includes a dedicated System Design round (...Show More

WHAT YOU'LL LEARN

A structured playbook for any software-engineer System Design interview, covering requirements clarification, ball-park sizing, trade-off analysis, and production validation.

Core building blocks such as DNS, load balancers, distributed caches, databases, message queues, and CDNs — and how to assemble them into web-scale services.

Straightforward formulas for estimating QPS, storage, and network throughput in seconds.

Latency, availability, and consistency tactics such as caching hierarchies, replication, sharding, and CAP-aware design.

Monitoring and alerting fundamentals drawn from real outage post-mortems, so you can detect and remediate issues early.

Interview communication techniques that sharpen time management, whiteboard clarity, and stakeholder-friendly trade-off narration.

A structured playbook for any software-engineer System Design interview, covering requirements clarification, ball-park sizing, trade-off analysis, and production validation.

Learning Roadmap

204 Lessons147 Quizzes

Introduction

Introduction to Modern System Design

Why Every Developer Should Learn System Design

Course Structure for Modern System Design

System Design Interviews

Getting Ready for the System Design Interview

The Do’s and Don’ts of the System Design Interview

System Design Interview Trap: Why Engineers Fail and Succeed

How Long Does It Take to Prepare for a System Design Interview?

System Design Mock Interviews

Let AI Evaluate Your System Design Interview Preparation

Preliminary System Design Concepts

4 Lessons

Non-Functional System Characteristics

7 Lessons

Back-of-the-Envelope Calculations

2 Lessons

Building Blocks

Introduction to Building Blocks for Modern System Design

Domain Name System

2 Lessons

Load Balancers

3 Lessons

Databases

5 Lessons

10.

Key-Value Store

5 Lessons

11.

Content Delivery Network (CDN)

7 Lessons

12.

Sequencer

3 Lessons

13.

Distributed Monitoring

3 Lessons

14.

Monitor Server-Side Errors

3 Lessons

15.

Monitor Client-Side Errors

2 Lessons

16.

Distributed Cache

6 Lessons

Distributed Cache System Design

Mock Interview

Premium

17.

Distributed Messaging Queue

7 Lessons

18.

Pub-Sub

3 Lessons

Pub-Sub System Design

Mock Interview

Premium

19.

Rate Limiter

5 Lessons

20.

Blob Store

6 Lessons

Blob Store System Design

Mock Interview

Premium

21.

Distributed Search

6 Lessons

22.

Distributed Logging

3 Lessons

23.

Distributed Task Scheduler

5 Lessons

24.

Sharded Counters

4 Lessons

25.

Concluding the Building Blocks Discussion

4 Lessons

26.

Design YouTube

6 Lessons

TikTok System Design

Mock Interview

Premium

27.

Design Quora

5 Lessons

28.

Design Google Maps

6 Lessons

29.

Design a Proximity Service/Yelp

5 Lessons

30.

Design Uber

7 Lessons

Uber Eats System Design

Mock Interview

Premium

31.

Design Twitter

6 Lessons

32.

Design Newsfeed System

System Design: Newsfeed System

33.

Design Instagram

5 Lessons

NewsFeed System Design

Mock Interview

Premium

34.

Design a URL Shortening Service/TinyURL

System Design: TinyURL

35.

Design a Web Crawler

System Design: Web Crawler

36.

Design WhatsApp

6 Lessons

Facebook Messenger System Design

Mock Interview

Premium

37.

Design Typeahead Suggestion

7 Lessons

38.

Design a Collaborative Document Editing Service/Google Docs

5 Lessons

39.

Design a Deployment System

2 Lessons

40.

Design a Payment System

2 Lessons

41.

Design a ChatGPT System

2 Lessons

ChatGPT System Design

Mock Interview

Premium

42.

Design a Data Infrastructure System

3 Lessons

43.

LLM-Powered Customer Support Bot System Design

2 Lessons

44.

AI-Powered Code Assistant System Design

2 Lessons

45.

Lessons from System Failures

4 Lessons

46.

Concluding Remarks

2 Lessons

47.

Free System Design Lessons

14 Lessons

48.

System Design Case Studies

5 Lessons

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Course Author:

Fahim ul Haq

Developed by MAANG Engineers

Every Educative lesson is designed by a team of ex-MAANG software engineers and PhD computer science educators, and developed in consultation with developers and data scientists working at Meta, Google, and more. Our mission is to get you hands-on with the necessary skills to stay ahead in a constantly changing industry. No video, no fluff. Just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

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Front-end Developer

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Software Developer

Hands-on Learning AI-Powered Learning

See how Educative uses AI to make your learning more immersive than ever before.

Personalized Interview Prep

Skip the LeetCode grind with a custom roadmap that adapts to your goals. Hands-on practice for Coding Interviews, System Design, and more.

Mock Interviews

Test your skills in a simulated interview setting. Receive personalized feedback based on your performance. Available for Coding Interviews, System Design, and more.

AI Prompt

Build prompt engineering skills. Practice implementing AI-informed solutions.

Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

Explain

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AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Free Resources

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