02coming soon
Professional Backend
Beyond CRUD tutorials: idempotency, backpressure, connection pooling, graceful shutdown, observability, and the architecture decisions that survive production.
Tracks
Ordered like chapters of a book. Each lesson assumes you already ship software for a living — and goes one level deeper than your day job requires.
012 lessons
JavaScript Internals
How engines actually run your code: hidden classes, inline caches, the event loop, garbage collection, and the optimizations your code triggers — or kills.
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03coming soon
Security for Developers
The attacks that actually happen and the code that stops them: injection beyond SQL, SSRF, prototype pollution, JWT pitfalls, and threat modeling for features.
04coming soon
Rust in Practice
Rust for engineers who already ship software: ownership as an API design tool, fearless concurrency, async runtimes, and when the borrow checker is telling you something.
05coming soon
Source Dives
Guided reading of real open-source code: how Express routes a request, how Vite transforms a module, how Redis stores a string. Learn architecture from code that won.