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# systemdesign

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Redis High-Level Design (HLD): How Redis Is Internally Built

Redis High-Level Design (HLD): How Redis Is Internally Built

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5 min read
Java LLD: Amazon Locker Design with SmallestFit Allocation

Java LLD: Amazon Locker Design with SmallestFit Allocation

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2 min read
Low-Level System Design (LLD) in Java: A Beginner's Guide

Low-Level System Design (LLD) in Java: A Beginner's Guide

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3 min read
The Blast Radius: Mentoring Senior Engineers into Systems Thinkers

The Blast Radius: Mentoring Senior Engineers into Systems Thinkers

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5 min read
TrueTime: Bounding Clock Uncertainty

TrueTime: Bounding Clock Uncertainty

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5 min read
Why Most Software Is Built Backwards

Why Most Software Is Built Backwards

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3 min read
A Domain-Driven Notification Microservice — Patterns From Production

A Domain-Driven Notification Microservice — Patterns From Production

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7 min read
Database per Service: ownership, not isolation

Database per Service: ownership, not isolation

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3 min read
How Does Netflix Remember Exactly Where You Stopped Watching?

How Does Netflix Remember Exactly Where You Stopped Watching?

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2 min read
Polymarket Architecture Deep Dive 2026: Hybrid CLOB + CTF Design Every Trading Bot Must Understand

Polymarket Architecture Deep Dive 2026: Hybrid CLOB + CTF Design Every Trading Bot Must Understand

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3 min read
[System Design] GraphHopper Distance Matrix: Self-Host OSRM vs Haversine for Route Optimization

[System Design] GraphHopper Distance Matrix: Self-Host OSRM vs Haversine for Route Optimization

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9 min read
Stripe sent the same purchase webhook 4 times. Idempotency saved us 4 emails.

Stripe sent the same purchase webhook 4 times. Idempotency saved us 4 emails.

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4 min read
Your Microservices Aren't Microservices

Your Microservices Aren't Microservices

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4 min read
If the warehouse already has the data, why are we copying it elsewhere?

If the warehouse already has the data, why are we copying it elsewhere?

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5 min read
Software Reliability

Software Reliability

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3 min read
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