Pick a track.
Commit to the reps.
Every challenge runs entirely in your browser — the brief on the left, a real editor and live output on the right, on a focus timer. Real datasets, real scikit-learn, real AI models. Finish a track and walk away with a portfolio that proves it.
7 Days of ML
Load data, train models, and ship a real classifier — one focused build a day for a week.
7 Days of AI
From prompts to a working AI feature you can actually demo — one build a day.
7 Days of MLOps
Package, deploy, and monitor a model end to end, one step a day.
Noob Dev Engineer
A sealed, timed exam: 20 intermediate-to-advanced questions across ML and AI, 10 minutes each. Pass to earn the Noob Dev Engineer badge.
Beginner
Ten gentle challenges — 5 machine learning, 5 AI — to get the core loop under your fingers.
Intermediate
Ten challenges — 5 ML, 5 AI — on the habits that separate a demo from a real model.
Advanced
Ten harder challenges — 5 ML, 5 AI — on the problems real datasets and real models actually throw.
Want a lab that isn’t here yet?
Tell us what you want to learn next, or just say hi. We ship new labs and tracks all the time — your request helps decide what’s next.