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# systemdesign

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CountIQ: A Systems Notebook on Real-World Backend Engineering
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CountIQ: A Systems Notebook on Real-World Backend Engineering

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3 min read
Temporal Workflow Engine: The Reliability Layer Your Distributed System Is Missing [2026 Guide]

Temporal Workflow Engine: The Reliability Layer Your Distributed System Is Missing [2026 Guide]

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7 min read
LLD-4:Weather Monitoring System

LLD-4:Weather Monitoring System

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3 min read
LLD-3:Shopping Cart Discount System

LLD-3:Shopping Cart Discount System

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3 min read
A 10% traffic spike took down a stable system in 3 minutes and 47 seconds.

A 10% traffic spike took down a stable system in 3 minutes and 47 seconds.

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3 min read
🚨 When “It Works” Isn’t Good Enough: Diagnosing Token Bottlenecks in Distributed Systems
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🚨 When “It Works” Isn’t Good Enough: Diagnosing Token Bottlenecks in Distributed Systems

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2 min read
S&OP Engineering IV: Scaling to Enterprise (Multi-SKU & Bottlenecks)

S&OP Engineering IV: Scaling to Enterprise (Multi-SKU & Bottlenecks)

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6 min read
I Built a Key-Value Database from Scratch — Here’s What I Learned
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I Built a Key-Value Database from Scratch — Here’s What I Learned

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4 min read
System Design Interview Preparation: The Complete Roadmap

System Design Interview Preparation: The Complete Roadmap

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6 min read
Designing a Rate Limiter to prevent spamming

Designing a Rate Limiter to prevent spamming

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3 min read
AI Execution on Mobile Will Depend as Much on Infrastructure as on Intelligence

AI Execution on Mobile Will Depend as Much on Infrastructure as on Intelligence

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2 min read
LLD-2:ECommerces Checkout

LLD-2:ECommerces Checkout

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3 min read
Back-of-Envelope Estimation: Numbers Every Engineer Should Know
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Back-of-Envelope Estimation: Numbers Every Engineer Should Know

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7 min read
What Is Runtime Authorization? A Guide to Dynamic Access Control and the Best Runtime Authorization Tools
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What Is Runtime Authorization? A Guide to Dynamic Access Control and the Best Runtime Authorization Tools

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5 min read
Making a Public Form Secure: Tokens, Idempotency & Real-World Backend Design

Making a Public Form Secure: Tokens, Idempotency & Real-World Backend Design

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3 min read
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