Featured track
Frontend Fundamentals
The core mechanics every frontend engineer needs wired in before anything else.
6 modules18 problemsBeginner friendly
1 active · 5 seeded
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Pick a track. Start the practice.
Focused learning paths across domains. Work through structured problems with clear briefs, starter files, and progress.
01
Frontend Fundamentals
HTML, CSS, DOM, events, and UI behavior. Build a rock-solid frontend foundation.
02
Backend Basics
Python, APIs, caching, config, and server logic. Ship reliable backends with confidence.
03
React
Components, state, effects, and data flow. Build real React apps from the ground up.
04
Algorithms & Data Structures
Arrays, trees, graphs, sorting, and more. Build strong fundamentals for any interview.
05
System Design
Design scalable systems. Make the right tradeoffs. Think like a senior engineer.
06
Testing
Write tests that catch bugs and give you the confidence to ship.
07
Security
Authentication, validation, and defensive code for systems that handle real user input.
08
Full Stack
End-to-end features from database to UI with real tradeoffs across layers.
How tracks work
Follow a path
Tracks organize problems from fundamentals into applied tasks.
Build real skills
Each problem reinforces a concrete behavior, API contract, or debugging workflow.
Stay focused
One domain at a time, with progress tied to solved problems.