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The fundamental structures of a software system.

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URL Shortener Design: The Capacity Math 90% of Candidates Get Wrong

URL Shortener Design: The Capacity Math 90% of Candidates Get Wrong

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7 min read
Designing a Notification System That Survives 10x Traffic Spikes

Designing a Notification System That Survives 10x Traffic Spikes

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8 min read
How to Design Uber's Dispatch System (and Why H3 Beat Geohash)

How to Design Uber's Dispatch System (and Why H3 Beat Geohash)

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7 min read
The CAP Theorem Question Every Senior System Design Interview Asks

The CAP Theorem Question Every Senior System Design Interview Asks

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7 min read
Sharding Strategies in 2026: Range, Hash, Geo, Directory — Which Wins When

Sharding Strategies in 2026: Range, Hash, Geo, Directory — Which Wins When

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7 min read
The 5 Distributed System Failures That Show Up in 80% of Postmortems

The 5 Distributed System Failures That Show Up in 80% of Postmortems

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8 min read
Designing a Web Crawler That Scales to 1 Billion Pages a Day

Designing a Web Crawler That Scales to 1 Billion Pages a Day

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7 min read
Twitter's Fanout Strategy at Scale: The Trade-Off Most Designs Miss

Twitter's Fanout Strategy at Scale: The Trade-Off Most Designs Miss

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9 min read
The Replication Lag Question That Shows Up in Most Senior Interviews

The Replication Lag Question That Shows Up in Most Senior Interviews

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7 min read
Designing a Rate Limiter: 4 Algorithms, Real Trade-Offs

Designing a Rate Limiter: 4 Algorithms, Real Trade-Offs

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8 min read
The Industry Needs an Open Reasoning Spec. Seven Papers Explain What Goes In It.

The Industry Needs an Open Reasoning Spec. Seven Papers Explain What Goes In It.

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12 min read
A Low Floor Is Not a Low Ceiling

A Low Floor Is Not a Low Ceiling

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10 min read
Why integrations fail in production (not theory, what actually breaks)

Why integrations fail in production (not theory, what actually breaks)

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2 min read
What Actually Breaks When You Connect AI to Real Enterprise Data

What Actually Breaks When You Connect AI to Real Enterprise Data

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2 min read
Why ERP integrations silently fail in production (and how I fixed it in Go)

Why ERP integrations silently fail in production (and how I fixed it in Go)

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4 min read
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