Product notes
Product updates, new challenges, and improvements, newest first.
Extension progress at a glance
The extension-selection page now labels extensions that are in progress or complete.
Structured Kafka request logs
Kafka test output now shows requests in a structured format alongside responses.
Faster test feedback
Test runs become more predictable, with notably faster Rust builds and faster feedback on failed submissions.
Pay with Zip or Pix
Zip becomes available in Australia and the US, and Pix becomes available in Brazil.
Upgrade buildpacks from the CLI
Update your project's buildpack yourself using the CodeCrafters CLI.
Geospatial commands for your Redis
Extend your Redis server with geospatial commands and learn how it stores and queries locations.
Campus access for Berkeley and IIT Roorkee
Eligible learners at Berkeley and IIT Roorkee can claim CodeCrafters access through dedicated campus pages.
View Code Examples on GitHub
Every CodeCrafters code example now links to its full GitHub repo. Study complete solutions from engineers who've solved the same challenge.
Sorted Sets for Redis
Implement Redis sorted sets and their commands.
Complete team contest leaderboards
Team contest leaderboards now show every participant rather than stopping at the top entries.
Pub/Sub for Redis
Add publish-and-subscribe messaging to your Redis server.
File Search for grep
Search individual files and directories for lines matching a pattern.
Reading is good.
Doing is better.
Build your own Claude Code, Shell, or SQLite. Understand what’s underneath.