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24 courses across 5 areas

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AI

Building with language models and agents

Agentic AI

Write an AI agent from nothing, then learn the frameworks.
8 modules · 34 lessonsOpen →

System Design

How whole systems are shaped, and what each choice costs

Architecture Patterns

Patterns for how a whole system is laid out.
8 layers · 56 patternsOpen →

Microservices Patterns

Splitting one service into many, and keeping it working.
9 groups · 46 patternsOpen →

Backend

Python and Node - APIs, performance, and runtime internals

GraphQL

Ask for exactly what you need - and pay for it in production.
8 modules · 69 lessons plannedOpen →

Core Python

One topic per lesson, from the interpreter to async.
13 modules · 75 lessons plannedOpen →

FastAPI

Python APIs from the first route to production.
5 sections · 20 lessonsOpen →

Node.js

From the event loop to a production API.
14 modules · 206 lessons plannedOpen →

Node.js Performance

Find what is slow, then prove you fixed it.
7 chapters · 36 topicsOpen →

Event Loop Lifecycle

Watch Node decide what runs next, step by step.
6 phases · 3 scenariosOpen →

Docker & Containerization

Package it once, run it anywhere - then run it safely.
11 modules · 144 lessons plannedOpen →

AWS for Developers

Build, deploy, secure, and operate production applications.
14 modules · 219 lessons plannedOpen →

CI/CD & DevOps Automation

From pull request to production, with nobody logging into a server.
10 modules · 134 lessons plannedOpen →

Frontend

React, and keeping the browser responsive under load

JavaScript & Modern JavaScript (ES6+)

The language itself, from the first variable to the event loop.
12 modules · 99 lessons plannedOpen →

TypeScript

JavaScript with a type system - from annotations to infer.
14 modules · 169 lessons plannedOpen →

React

From JSX to production, in eighteen modules.
18 modules · 192 lessons plannedOpen →

Micro Frontend

Many teams, one page - and the honest cost of it.
9 modules · 77 lessons plannedOpen →

Redux

One store, one direction, and everything that follows.
18 modules · 187 lessons plannedOpen →

React Hooks

Every React 18 and 19 hook, with a live demo each.
9 groups · 18 hooksOpen →

Huge JSON Handling

Eleven ways to survive a JSON file that is too big.
11 approachesOpen →

Fundamentals

The craft underneath the frameworks

SQL & Database Fundamentals

Ask a database the right question, then make it answer fast.
12 modules · 177 lessons plannedOpen →

NumPy - Numerical Computing with Python

Fast arrays - the layer underneath Pandas and machine learning.
10 modules · 76 lessons plannedOpen →

Pandas - Data Analysis with Python

Real tabular data - read it, clean it, and turn it into answers.
10 modules · 103 lessons plannedOpen →

Data Structures & Algorithms

Interview problems grouped by the trick that solves them.
7 techniques · 11 problemsOpen →

Design Patterns

The Gang of Four patterns, in Node.js.
3 groups · 23 patternsOpen →