Build your own Shell

Learn about parsing shell commands, executing programs and more

28 stages

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Build your own grep

Learn about regex syntax: character classes, quantifiers and more

15 stages

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Build your own Interpreter

Learn about tokenization, ASTs, tree-walk interpreters and more.

FREE DURING BETA

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Build your own HTTP server

Learn about TCP servers, the HTTP protocol and more

11 stages

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Build your own Redis

Learn about TCP servers, the Redis protocol and more

55 stages

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Build your own BitTorrent

Learn about .torrent files, the BitTorrent Peer Protocol and more

19 stages

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Build your own Kafka

Learn about TCP servers, the Kafka wire protocol and more.

FREE DURING BETA

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Build your own Git

Learn about git objects, plumbing commands and more

7 stages

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Build your own SQLite

Learn about SQL syntax, SQLite's file format, B-trees and more

9 stages

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Build your own DNS server

Learn about the DNS protocol, DNS record types and more.

8 stages

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