Level Up Coding System Design Newsletter

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Oct 20

7

How HTTPS Actually Works

(4 Minutes) | How it Works, TLS Handshake, Evolution, and Why it Matters

Oct 18 • 

Level Up Coding

1

WebSockets Clearly Explained

(5 Minutes) | How They Work, When to Use Them (and When Not To), the Benefits, and the Tradeoffs

Oct 11 • 

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September 2025

How Message Queues Actually Work

(4 Minutes) | When to Use Them, The Tradeoffs to Watch Out For, and How to Avoid Common Pitfalls

Sep 27 • 

Level Up Coding

3

Service Discovery in Distributed Systems Clearly Explained

(5 Minutes) | Client-Side Discovery vs Server-Side Discovery

Sep 20 • 

Level Up Coding

1

Forward Proxy vs Reverse Proxy

(4 Minutes) | Core Ideas, Benefits, Trade-offs, Where and When to Use Each

Sep 13 • 

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3

Idempotency in API Design Clearly Explained

(4 Minutes) | When to Use it, How to Implement it, Benefits, Tradeoffs, Decision Table

Sep 10 • 

Level Up Coding

2

August 2025

API Gateway vs Load Balancer

(4 Minutes) | How They Work, Benefits, Pitfalls, Where and When to Use Each

Aug 12 • 

Level Up Coding

1

July 2025

Concurrency is NOT Parallelism

(4 Minutes) | Concurrency vs Parallelism — They Are Not The Same

Jul 21 • 

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PACELC Theorem Clearly Explained

(3 Minutes) | Beyond CAP: Why PACELC Gives Us a Fuller Picture of Distributed Systems

Jul 7 • 

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June 2025

Batch Processing vs Real-time Streaming

(5 Minutes) | Core Ideas, Benefits, Drawbacks, Where and When to Use Each

Jun 22 • 

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ACID Clearly Explained

(5 Minutes) | Understanding ACID Transactions in Databases

Jun 17 • 

Level Up Coding

1