Structured, interview-ready courses with code examples, common mistakes and real interview questions. 100% free, no sign-up.
The bachelor's-level CS curriculum — from your first line of code to OOP, templates, sorting and STL.
From zero to interview-ready — modern JavaScript, in plain English.
Modern React with hooks, patterns and the interview questions companies actually ask.
Enterprise-grade, interview-ready Java — from your first program to OOP, collections, streams, concurrency and the JVM.
Classes, encapsulation, inheritance and polymorphism — the patterns every senior dev reads fluently.
Arrays, linked lists, stacks, queues, trees, graphs and hash maps — the toolbox interviewers love.
Sorting, searching, recursion, DP and greedy — pattern-spot your way through interview rounds.
Type-safe JavaScript — generics, utility types, narrowing and patterns from real codebases.
From basics to data structures — the most beginner-friendly serious language used everywhere.
Build the structural and visual layer of every website — semantic HTML, Flexbox, Grid and more.
Joins, indexes, transactions, window functions — the universal language of relational data.
Build APIs and CLIs with the JS runtime that powers half the modern backend world.
Modern Angular — signals, standalone components, zoneless change detection and SSG.
Production React — server components, file-based routing, data fetching and built-in SEO.
Caching, queues, sharding, scaling — crack the senior interview round with proven patterns.
Branches, rebase, conflict resolution, PR workflows — the version-control backbone of every team.