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Isaac Yuen

Isaacwhyuenac
Kotlin Rust Python Scala Go Ruby Java Clojure C++ Haskell Dart C TypeScript OCaml Nim Odin C#
joined 3 years ago

Challenges

Build your own Docker
using Python, Ruby, C and Nim
Build your own Docker
Learn about kernel namespaces, chroot, the registry API and more
completed
Nim C Ruby Python
Build your own Interpreter
using Go and Kotlin
Build your own Interpreter
Learn about tokenization, ASTs, tree-walk interpreters and more.
completed
Kotlin Go Python Java Scala
Build your own DNS server
using Go, Rust, Python, C++ and Java
Build your own DNS server
Learn about the DNS protocol, DNS record types and more.
completed
Java C++ Python Rust Go
Build your own SQLite
using C++, Java, Kotlin and Rust
Build your own SQLite
Learn about SQL syntax, SQLite's file format, B-trees and more
completed
Rust Kotlin Java C++ Go
Build your own Shell
using Java, Go, Rust, C#, Python and Kotlin
Build your own Shell
Learn about parsing shell commands, executing programs and more
completed
Kotlin Python C# Rust Go
Build your own Kafka
using Go, Rust and Python
Build your own Kafka
Learn about TCP servers, the Kafka wire protocol and more.
completed
Python Rust Go Java Scala
Build your own Redis
using Scala and Go
Build your own Redis
Learn about TCP servers, the Redis protocol and more
completed
Go Scala Java Python C++
Build your own grep
using Python, TypeScript and Go
Build your own grep
Learn about regex syntax: character classes, quantifiers and more
completed
Go TypeScript Python Java C#
Build your own BitTorrent
using Kotlin, Java and Haskell
Build your own BitTorrent
Learn about .torrent files, the BitTorrent Peer Protocol and more
completed
Haskell Java Kotlin Go Rust
Build your own Git
using Go, C++, Rust, Java and Haskell
Build your own Git
Learn about git objects, plumbing commands and more
completed
Haskell Java Rust C++ Go
Build your own HTTP server
using Dart, OCaml, Odin, Clojure, Go, Rust, Scala, Kotlin, Java and Haskell
Build your own HTTP server
Learn about TCP servers, the HTTP protocol and more
completed
Haskell Java Kotlin Scala Rust
Build your own Claude Code
using TypeScript, Zig, Java, C#, Go and Rust
Build your own Claude Code
Learn about LLM APIs, tool calling, agent loops and more
7/18 stages
Rust Go C# Java Zig
November 2026
October 2026
September 2026
August 2026
July 2026
June 2026
May 2026
April 2026
March 2026
February 2026
January 2026
November 2025
May 2025
April 2025
May 2024
April 2024
March 2024
February 2024
January 2024
September 2023
  • Joined CodeCrafters