A community of hackers
who dig one level deeper.

I've started the Docker challenge, enjoying it a lot so far. Just the right level of guidance, helpful and still gives you a lot of freedom to explore and learn for yourself.

These guys ruined my weekend

The Redis challenge was a great way to procrastinate sleeping for a week! A good change of pace from my regular work, and allowed me to explore some cool tech. I'll be back for more.

My favorite way to master a language.

The Docker challenge helped me dive into its internals, through *actual* practice. Super fun.

There are few sites I like as much that have a step by step guide. The real-time feedback is so good, it's creepy!

Found out from a colleague. It has you build your own version of things like Git and Docker from scratch. A cool way to build a stronger mental model of how those tools work.

I spent a full day on your Docker building course and ended up building the whole thing myself. As a SRE (and mostly a user of docker), digging into the internals blew me away.

I'm learning about how Redis works under the hood, system calls, socket programming in Python — something I've never done before

I was really impressed that they support Haskell, and will probably use this to learn Rust! The git-based workflow is :chefkiss:

The Redis challenge was extremely fun. I ended up having to read Redis protocol specification doc pretty carefully in its entirety! The result felt like lightly-guided independent study, if that makes sense. (Which, again, was lots of fun)

The instant feedback right there in the git push is really cool. Didn't even know that was possible!