The library

23 courses, 190+ hours of video, quizzes and code challenges spanning system design, backend, data, infrastructure and frontend engineering. All included with one subscription.

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14 hrs

System Design

Design systems that hold up under load, failure and five years of change.

Level: Advanced46 lessonsView path

11 hrs

Software Architecture

Boundaries, layering and the decisions that decide how changeable a codebase is.

Level: Advanced39 lessonsView path

7 hrs

API Design

REST, RPC and events — designing interfaces you will not regret shipping.

Level: Intermediate29 lessonsView path

13 hrs

Algorithms & Data Structures

The reasoning behind complexity, so you pick the right structure without guessing.

Level: Intermediate54 lessonsView path

12 hrs

Programming Foundations

The language-agnostic core: types, memory, concurrency and control flow.

Level: Beginner51 lessonsView path

18 hrs

React

The interactive way to master modern React, hooks and all.

Level: Intermediate64 lessonsView path

6 hrs

Data Fetching

Caching, mutations and stale data, demystified once and for all.

Level: Intermediate28 lessonsView path

10 hrs

TypeScript

The complete guide that takes you from zero to types hero.

Level: Beginner52 lessonsView path

Everything else

6 hrs

Testing & Quality

A test suite that catches real bugs and still runs before your coffee lands.

Level: Intermediate27 lessonsView path

10 hrs

Docker & Kubernetes

Containerise, deploy and operate services without cargo-culting YAML.

Level: Intermediate42 lessonsView path

5 hrs

Observability

Logs, metrics and traces that answer questions at 3am instead of adding noise.

Level: Intermediate23 lessonsView path

12 hrs

Advanced JavaScript

Closures, prototypes, event loop. Master the mother language.

Level: Advanced47 lessonsView path

9 hrs

Modern JavaScript

Lay a solid foundation using the features that shipped this decade.

Level: Beginner41 lessonsView path

5 hrs

Routing

Get off to the races building complex, deeply nested apps.

Level: Intermediate22 lessonsView path

7 hrs

React + TypeScript

Feel at home in any codebase by adding types to your toolkit.

Level: Intermediate30 lessonsView path

4 hrs

Deno

A modern runtime for JS and TS with security baked in.

Level: Intermediate18 lessonsView path

8 hrs

Full-Stack Frameworks

Server rendering, streaming and file-based routing from scratch.

Level: Advanced35 lessonsView path

6 hrs

Svelte

Build fast full-stack apps with a compiler doing the heavy lifting.

Level: Beginner26 lessonsView path

7 hrs

Linux

Self-host your apps like an open-source freedom fighter.

Level: Beginner33 lessonsView path

2 hrs

Editor Tricks

Write code faster with shortcuts, snippets and sane defaults.

Level: Beginner14 lessonsView path

9 hrs

Postgres

Ship a production database without waking up at 3am.

Level: Intermediate38 lessonsView path

4 hrs

Git

Master branching, rebasing and rescue operations from the ground up.

Level: Beginner21 lessonsView path

5 hrs

App Security

Lock down auth, rules and secrets before someone else does.

Level: Advanced24 lessonsView path