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Jeremy Fenwick

JeremyFenwick
C# Kotlin Go
joined 2 years ago

Challenges

Build your own Shell
using Kotlin
Build your own Shell
Learn about parsing shell commands, executing programs and more
completed
Kotlin C# Rust
Build your own DNS server
using C# and Go
Build your own DNS server
Learn about the DNS protocol, DNS record types and more.
completed
Go C#
Build your own HTTP server
using Kotlin and Go
Build your own HTTP server
Learn about TCP servers, the HTTP protocol and more
completed
Go Kotlin Elixir C#
Build your own Git
using Rust
Build your own Git
Learn about git objects, plumbing commands and more
5/7 stages
Rust
Build your own BitTorrent
using Elixir, C# and Kotlin
Build your own BitTorrent
Learn about .torrent files, the BitTorrent Peer Protocol and more
13/19 stages
Kotlin C# Elixir
Build your own Kafka
using Java
Build your own Kafka
Learn about TCP servers, the Kafka wire protocol and more.
4/25 stages
Java
Build your own grep
using C#
Build your own grep
Learn about regex syntax: character classes, quantifiers and more
19/33 stages
C#
Build your own Redis
using C#
Build your own Redis
Learn about TCP servers, the Redis protocol and more
47/97 stages
C#
Build your own Interpreter
using Go
Build your own Interpreter
Learn about tokenization, ASTs, tree-walk interpreters and more.
15/84 stages
Go
November 2025
September 2025
August 2025
July 2025
January 2025
December 2024
November 2023
  • Joined CodeCrafters