The Cold Start Problem

The cold start problem is a chicken-and-egg trap: no users without value, no value without users.

Jan 7 • Teiva Harsanyi

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December 2025

Build Your Own Key-Value Storage Engine—Week 4

Deletes, Tombstones, and Compaction

Dec 17, 2025 • Teiva Harsanyi

4

Build Your Own Key-Value Storage Engine—Week 3

Durability with Write-Ahead Logging

Dec 3, 2025 • Teiva Harsanyi

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November 2025

Linus Torvalds vs. Ambiguous Abstractions

There’s no issue with abstracting code into a helper function. If we want to optimize for cognitive load, the intent should be as clear as possible…

Nov 26, 2025 • Teiva Harsanyi

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3

Build Your Own Key-Value Storage Engine—Week 2

LSM Tree Foundations

Nov 19, 2025 • Teiva Harsanyi

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Nothing Beats Kindness

No act of kindness, no matter how small, is ever wasted.

Nov 13, 2025 • Teiva Harsanyi

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Build Your Own Key-Value Storage Engine—Week 1

In-Memory Store

Nov 5, 2025 • Teiva Harsanyi

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October 2025

Horror Coding Stories: Therac-25

In total, there were six known radiation overdoses involving the Therac-25,and at least three were fatal.

Oct 31, 2025 • Teiva Harsanyi

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Build Your Own Key-Value Storage Engine

Eight Weeks to a Working Key-Value Storage Engine

Oct 29, 2025 • Teiva Harsanyi

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Speed vs. Velocity

On paper, the team delivered 10 story points. That is only speed, though, not velocity. If we care about direction as well, the team only delivered a…

Oct 22, 2025 • Teiva Harsanyi

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Conflict-Free Replicated Data Types (CRDTs)

No matter when or how often the nodes sync, they always end up with the same state.

Oct 16, 2025 • Teiva Harsanyi

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1

The Story of The Coder Cafe

I love sharing, and you give me an audience.

Oct 9, 2025 • Teiva Harsanyi

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