Challenges

Build your own Interpreter

using C++

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

completed

Build your own Claude Code

using C++

Learn about LLM APIs, tool calling, agent loops and more

completed

Build your own Redis

using Scala

Learn about TCP servers, the Redis protocol and more

completed

Build your own Shell

using Python

Learn about parsing shell commands, executing programs and more

completed

Build your own Kafka

using Java

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

18/25 stages

Build your own grep

using Python

Learn about regex syntax: character classes, quantifiers and more

19/33 stages

• Completed the Build your own Shell challenge using Python

• Completed the Build your own Redis challenge using Scala

• Completed the Build your own Claude Code challenge using C++

• Started the Build your own grep challenge using Python

• Started the Build your own Kafka challenge using Java

• Completed the Build your own Interpreter challenge using C++

• Joined CodeCrafters