Duolingo for software engineers
Unrot your dev brain.
Stay sharp in 5 minutes a day. Pick your stack, keep your streak, don't let your dev brain rot.
8 launch tracks
Pick your stack
Daily practice across the languages, frameworks, and fundamentals experienced developers actually use.
JavaScript/TypeScript
Closures, the event loop, `this`, generics, and the type-system tricks you forget when the compiler does the thinking.
React
Hooks rules, the rendering model, memoization, effects, and server components.
Next.js
App Router, caching, server actions, and rendering strategies.
Python
Data model, comprehensions, async, typing, and stdlib idioms.
Java & OOP
OOP design, collections, generics, concurrency, and JVM basics.
SQL & PostgreSQL
Joins, indexes, window functions, transactions, and query plans.
System Design
Scalability basics, caching layers, load balancing, queues, replication, and CAP tradeoffs.
Data Engineering
Batch vs. streaming, data modeling, warehouses vs. lakes, orchestration, and analytical SQL.
How it works
Three steps. Five minutes. Every day.
Pick your stack
Choose 1–3 tracks that match what you already know — or what you're trying to keep sharp.
5 minutes a day
Short daily sessions mix new concepts with spaced-repetition review of the ones getting rusty.
Keep your streak
Finish one session a day to keep your streak alive and watch your skill tree level up.
Your dev brain is rotting. Fix it in 5 minutes a day.
Free to start. No credit card required.