anish @Anishdotcom - Twitter Profile

Pinned Tweet

4 months ago

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.

Anishdotcom's tweet photo. 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.

22

109

3

24

16K

anish

@Anishdotcom

Last Seen Users on Sotwe

Trends for you

Most Popular Users