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I Teach You System Design • Founder @ System Design One Join 150K+ Subscribers → https://newsletter.systemdesign.one/
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Here are some probabilistic data structures you must know as a software engineer (not kidding): They trade accuracy for space efficiency. They're often used in: • Databases • Cache • Search engines • Network infrastructure • Analytics What else should make this list?

submitted 52 days ago • 0 comments

If you want to reduce latency, learn these 12 rules:

submitted 55 days ago • 0 comments

Give me 2 mins and I'll teach you how DNS works:

submitted 58 days ago • 1 comment

Meta achieves 99.99999999% cache consistency. Here’s how they do it (in 2 minutes): —— 👋 PS - I put together a detailed case study with visuals in my newsletter: → newsletter.systemdesign.one/p/cache-cons...

submitted 76 days ago • 1 comment

Give me 2 mins and I'll teach you how Disney+ Hotstar scaled to 25M concurrent users—no fluff:

submitted 79 days ago • 0 comments

How I’d scale a site to 1 million users—step by step:

submitted 80 days ago • 0 comments

HTTP status codes you must know as a web developer in 2025: Status codes are 3-digit numbers returned by a server in response to HTTP requests. It tells the client about the request status and indicates problems if any. So understanding status codes will help you find site errors quickly.

submitted 83 days ago • 1 comment

This lady: • Has no tech background • Couldn't draw well as a kid • Knew nothing about venture capitalists Yet she's worth $5.8 Billion - at 37.

submitted 84 days ago • 1 comment

I'm Type 3 and You?

submitted 85 days ago • 4 comments

How to write clean code. The KYD-DTC Playbook:

submitted 88 days ago • 1 comment

Give me 2 mins and I'll teach you how a database stores passwords securely (not kidding):

submitted 89 days ago • 0 comments

Give me 2 mins and I'll teach you how Amazon S3 (actually) works:

submitted 92 days ago • 0 comments

I spent hours studying how Apple Pay works, so you don't have to. Here's what I learned distilled into 9 sentences:

submitted 94 days ago • 1 comment

Popular apps and open-source alternatives: What else should make this list? • Microsoft Office → Libre Office • WhatsApp → Signal • Google Chrome → Mozilla Firefox • Adobe Photoshop → Krita • Google → DuckDuckGo • Windows / Mac → GNU Linux

submitted 97 days ago • 3 comments

Give me 2 minutes and I'll teach you how YouTube supports 2.49 billion users with MySQL (not kidding):

submitted 98 days ago • 0 comments

I spent hours studying how Amazon S3 achieves 99.999999999% durability — because S3 is the new norm. Here's what I learned distilled into 12 sentences (not kidding):

submitted 99 days ago • 0 comments

Git has 152 commands. But most people don't know the powerful ones. Here are the 4 must learn Git commands (bookmark this):

submitted 100 days ago • 0 comments

Give me 2 minutes, and I'll teach you how Uber computes ETA (not kidding):

submitted 101 days ago • 0 comments

I spent hours studying how Amazon Lambda works — because Serverless is the new norm. Here's what I learned distilled into 11 sentences (you'll thank me later):

submitted 102 days ago • 0 comments

If you want to become good at system design (I'm not joking), learn these case studies:

submitted 103 days ago • 1 comment

14 Redis use cases you must know as a software engineer (bookmark this): What else should make the list?

submitted 104 days ago • 1 comment

Bad vs Good Software Engineers What else should make this list?

submitted 105 days ago • 2 comments