Systems End-to-End At-a-Glance
15+
Full Walkthroughs
25+
Fundamental Topics
10+
Hours of Content
1-2
New Videos a Week
Your Software Engineering Interview Toolkit
Fundamentals from the Ground Up
We teach you the fundamentals of system design from the ground up. You'll learn low-level principles in a way that makes it easy to see the big picture of even the most complex system.
AI Teaching Assistant
Have a context-aware AI-assistant on standby to help you as you study. Your assistant will be aware of the problem, solutions, your workspace code, any active errors, and more. Ask it anything!
40+ Exceptional Explanations
We offer a sizable amount of high-signal content. Our library took nearly a year to aggregate in-full.
Live Library
We are constantly editing, pruning, & expanding our content library. Each content item takes 4-8 hours to produce. We are constantly going to work to make the library better.
1-1 Problem Support
Join our Discord to receive peer & instructor support. When you get stuck there is always someone to help you continue forward.
Exceptional Video Explanations
Challenging topics need clear, methodical, explanations. You have to do the actual math, you have to go deep into the why behind approaches.
This is why we take a ground-up approach to any concept we teach so it just “clicks” in our students’ minds.
We see every lesson as a conversation. Taking a student from beginner to advanced understanding incrementally.
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Table of Contents
Requirements
0:00
How Search Works
0:20
API: Accepting Search Queries
1:57
Database: Storing Site Metadata
2:37
Database Demands
4:00
Page BLOB Store
4:32
Database Sharding
4:58
Global Index
5:51
Text Index
6:14
The System Thus Far
6:50
Crawling
7:33
robots.txt Cache
8:47
Crawler Demands
9:05
The System So Far
10:12
URL Frontier: Priority
10:45
URL Frontier: Politeness
11:20
Naive URL Frontier
11:42
Multiple Queues
12:12
Solving for Politeness
13:16
URL Frontier: Recap
15:32
URL Frontier Demands
15:57
Full Design Review
17:05
Extensions
17:30
Context-Aware AI Teaching Assistant
Stuck on a problem? Curious how a solution works, or just want a deeper understanding? Talk to your own personalized AI teaching assistant.
Have a 1-1 conversation with a context-aware AI briefed on your code, the problem statement, any errors you are facing, potential solutions, & more.
24/7, 365, you can ask your assistant questions as you learn.
Interview Pen played a huge role in finalizing my understanding of many concepts I faced in my technical interview rotations.
