Featured track
Frontend Fundamentals
The core mechanics every frontend engineer needs wired in before anything else.
6 modules18 problemsBeginner friendly
1 active · 4 seeded · 1 planned
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Focused learning paths across domains. Build real skills with structured problems, projects, and practice.
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 are structured paths of problems from fundamentals to mastery.
Build real skills
Each problem reinforces core concepts and builds lasting intuition.
Stay focused
One domain. One goal. Consistent progress that compounds.