Level Up Coding System Design Newsletter | Nikki Siapno | Substack

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Jan 6 • Nikki Siapno

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JWT Clearly Explained

Nov 4, 2025 • Nikki Siapno

gRPC Clearly Explained

Jan 18 • Nikki Siapno

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Load Balancing Algorithms Clearly Explained (In Under 8 Minutes)

Jan 10 • Nikki Siapno

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How SSO Actually Works

(5 mins) | What actually happens when you click “Sign in with Google”

Mar 28 • Nikki Siapno

Hashing vs Encryption vs Tokenization

(5 minutes) | One question decides which one you should use...

Mar 24 • Nikki Siapno

Sync vs Async Clearly Explained

(5 minutes) | One design choice determines if your system blocks or flows.

Mar 21 • Nikki Siapno

Why “Hash the Password” Isn’t Enough

(5 minutes) | How salts, key stretching, and memory-hard algorithms stop brute-force attacks.

Mar 16 • Nikki Siapno

CAP Theorem Clearly Explained

(4 minutes) | Choosing your failure mode, avoiding common mistakes, and a decision checklist.

Mar 13 • Nikki Siapno

Event-Driven Architecture Clearly Explained

(4 minutes) | When fan-out is power, and when it becomes operational debt.

Mar 3 • Nikki Siapno

Level Up Coding System Design Newsletter

Level Up Coding System Design Newsletter

Get our System Design Handbook for FREE when you subscribe.

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