anish

20 • following obsession

[anish @Anishdotcom]

System Design By First Principles

What is System Design?

Netflix: Millions of streams. Zero downtime.
Uber: Peak demand. Smooth rides.
Zomato: Dinner rush. No breakdowns.

That reliability isn’t luck.

And it isn’t just “good code”.
That’s system design.

When your app is small:

- Few users
- One server
- One database Everything feels easy.

But as users grow:

- Traffic spikes
- Data explodes
- Failures happen

Costs increase

That’s when systems break unless they’re designed to grow.

At its core:
System design is deciding how your system should behave before you start writing code.

It answers questions like:

- Where does the data live?
- What happens during traffic spikes?
- What breaks first—and how do we recover?
- How do system components talk to each other?

There’s an important difference most of us miss:

Coding asks: “Does it work?”

System design asks: “Will it still work at scale?”

Every real system is built from the same basic pieces:

- Clients (apps, browsers)
- Servers (business logic)
- Data stores (databases, caches)
- Network (communication)
- Constraints (cost, latency, scale)

System design is about connecting these pieces so growth doesn’t break everything.

There is no perfect system.
Every decision is a trade-off:

- Speed vs consistency
- Cost vs performance
- Simplicity vs scalability

Netflix’s design isn’t “best”.
It’s best for Netflix’s problems.

That’s the mindset system design builds.

What I’m doing next:
I’m starting to learn system design properly from first principles.

I’m not an expert. I’m learning this as a beginner.
I’ll share all I learn.

Let’s learn this together and see where it goes.

[anish @Anishdotcom]

@anuragdotdev Good work broski

[anish @Anishdotcom]

@Parthak32315 Ab dhanoo ki sawari shuru hogi ki nahi is baar

[Amaan @dextertwts]

wrote a detailed 20 min read on ren0va. go checkout :)

tried to cover cloudfare workers, astrojs and islands, wrangler cli, fuzzy search and lazy loads on the go

[link in comments]

[anish @Anishdotcom]

@dextertwts Damnn need to check this fr 🛐

[Amaan @dextertwts]

wrote a detailed guide on Amazon's S3 HLD, erasure coding, checksums, building a multipart chunking engine, and writing prod styled codebases w cloudinary

20 min read. go checkout

[link in comments]

[anish @Anishdotcom]

@cmd_dj221 Damn after reading your thoughts in this I am also excited to watch it

Will check it too

[anish @Anishdotcom]

@ishadotio Damnn 😭

[anish @Anishdotcom]

@leo0xtw Chocolate boii 😋

[anish @Anishdotcom]

@Rushu_Tushu Tera kasa gaya?

[anish @Anishdotcom]

@ParasVerma7454 @Coder_Mayu18 Bhai mei to season 2 pe hi hu abhi bhi

[anish @Anishdotcom]

5/n

- Studied for WTL exam whole day
- Steps : 10k
- Gym : Shoulder + Abs
- Protein: 90g
- Watched Anime : Rezero, COTE

[anish @Anishdotcom]

@amaashvi @takeUforward_ Atb 🙌🏻

[anish @Anishdotcom]

@neuroquark Nahi bhai kuch hai hi nahi dalne jaisa 😭

[anish @Anishdotcom]

@Coder_Mayu18 Yes 😋

[anish @Anishdotcom]

@yellow_void22 Bhai itne jaldi chutti bhi khatam ho rahi hai 😭

[anish @Anishdotcom]

@devsterxyz W day 🙌🏻

[anish @Anishdotcom]

@amaashvi Keep going 🙌🏻 jaldi Ho jayega

[anish @Anishdotcom]

@dhruvtwt_ Big W bhai
Seo ke tips jara hum gareebo mei bhi dedo

[anish @Anishdotcom]

@distroaryan Keep building and Cookjing broski 🙌🏻😋

[anish @Anishdotcom]

@kartikktwt Koi na Bhai 🙌🏻 you worked hard that matters the most