Learn Programming & Technology

Artificial Intelligence

Foundations of AI and machine learning for software engineers.

6 lessons

LangChain

A framework for building LLM applications — chains, agents and tool use.

8 lessons

LLMs

How large language models work — transformers, tokens, context windows and inference.

8 lessons

Machine Learning

Supervised and unsupervised learning, training, and evaluating models.

9 lessons

Prompt Engineering

Techniques for getting reliable, high-quality output from LLMs.

8 lessons

RAG (Retrieval-Augmented Generation)

Grounding LLM responses in your own data with embeddings and vector search.

8 lessons

AJAX

Asynchronous requests from the browser without a full page reload.

7 lessons

GraphQL

A query language for APIs — schemas, resolvers, and fetching exactly the data you need.

8 lessons

Apache Kafka

A distributed event streaming platform for high-throughput, durable messaging.

9 lessons

Microservices

Splitting a system into independently deployable services — patterns and pitfalls.

12 lessons

Node.js

Server-side JavaScript — the event loop, npm, and building APIs with Node.

9 lessons

RabbitMQ

A battle-tested message broker for queues, routing and reliable async processing.

8 lessons

REST API

Designing resource-oriented HTTP APIs — verbs, status codes, versioning and pagination.

9 lessons

WebSockets

Full-duplex, real-time connections between browser and server.

7 lessons

Algorithms

Sorting, searching, recursion and Big-O — how to reason about whether code is actually fast.

11 lessons

Data Structures

Arrays to graphs — how data is organized in memory, and when to reach for which structure.

11 lessons

Angular

A full-featured, opinionated TypeScript framework for large-scale frontend applications.

8 lessons

Bootstrap

The classic component-based CSS framework — grid system, components and utilities.

7 lessons

CSS

Styling the web — the box model, flexbox, grid, and responsive design.

9 lessons

HTML

The markup language behind every web page — elements, forms, semantics and accessibility.

8 lessons

jQuery

DOM manipulation, events and AJAX with the library that still powers a huge share of the web.

7 lessons

Next.js

The React framework for production — file-based routing, rendering modes and API routes.

8 lessons

Nuxt.js

The Vue framework for production — file-based routing, rendering modes and modules.

7 lessons

React

The component-based UI library — JSX, hooks and state that powers a huge share of the web.

9 lessons

Svelte

A compiler-first frontend framework — no virtual DOM, truly reactive components.

7 lessons

Tailwind CSS

A utility-first CSS framework for building modern UIs fast, without leaving your HTML.

7 lessons

Vue.js

An approachable, reactive frontend framework — templates, components and the Composition API.

8 lessons

ASP.NET Core

Building web apps and APIs on .NET — middleware, MVC, minimal APIs and DI.

6 lessons

Django

Python's batteries-included web framework — ORM, admin panel and views out of the box.

9 lessons

.NET

Microsoft's cross-platform runtime for building modern applications with C#.

6 lessons

Entity Framework Core

Microsoft's ORM for .NET — DbContext, migrations and LINQ queries.

6 lessons

FastAPI

A modern, high-performance Python API framework with automatic validation and docs.

8 lessons

Flask

A lightweight Python web framework — routing, templates and a simple path to a real API.

8 lessons

Gin

A fast, minimalist HTTP web framework for Go.

6 lessons

gRPC

High-performance RPC using protocol buffers, popular for internal microservice APIs.

6 lessons

Hibernate

The Java ORM — entities, mappings, the session, and lazy vs eager loading.

7 lessons

Laravel

The expressive PHP framework — routing, Eloquent ORM, Blade templates and elegant syntax.

9 lessons

NestJS

A structured, TypeScript-first Node.js framework inspired by Angular — modules, DI and decorators.

7 lessons

Spring

The core Spring Framework — dependency injection, beans and the container.

6 lessons

Spring Boot

Convention-over-configuration Spring — auto-configuration, starters and production-ready apps fast.

7 lessons

Spring Cloud

Building distributed systems with Spring — config, discovery, gateways and resilience.

6 lessons

Spring Data JPA

Repository-based persistence on top of JPA/Hibernate with minimal boilerplate.

6 lessons

Spring MVC

Spring's web framework — controllers, request mapping and view resolution.

6 lessons

Spring Security

Authentication and authorization for Spring apps — filters, JWT and method security.

6 lessons

AWS

Core AWS services for hosting, scaling and operating cloud applications.

8 lessons

Azure

Microsoft's cloud platform — core services for hosting, scaling and operating cloud applications.

4 lessons

CI/CD

Automating build, test and deploy pipelines with GitHub Actions, Jenkins and friends.

7 lessons

Docker

Packaging apps into containers — images, Dockerfiles, volumes and Docker Compose.

8 lessons

Git

Version control — commits, branches, merges, rebasing and collaborative workflows.

8 lessons

Kubernetes

Orchestrating containers at scale — pods, deployments, services and scaling.

8 lessons

Linux

The command line, file system, permissions and processes every backend engineer needs.

9 lessons

Nginx

A high-performance web server and reverse proxy used across the modern web.

7 lessons

Terraform

Infrastructure as code — declaratively provisioning cloud resources.

8 lessons

C

The foundational systems language — pointers, memory, and how computers really work.

8 lessons

C++

High-performance systems programming with manual memory control and modern C++ features.

8 lessons

C#

A modern, type-safe language powering .NET applications, games and services.

8 lessons

Dart

The language behind Flutter — cross-platform mobile, web and desktop apps.

7 lessons

Go

Learn Go — a simple, fast, statically-typed language built for concurrency and modern backends.

11 lessons

Java

Learn Java from the ground up — syntax, OOP, collections, streams, exceptions and concurrency.

10 lessons

JavaScript

The language of the web — syntax, the DOM, async programming and modern ES features.

9 lessons

Kotlin

A modern, concise JVM language and the default choice for native Android apps.

8 lessons

PHP

The language behind most of the web — syntax, arrays, OOP and modern PHP 8 features.

8 lessons

Python

A clean, readable language for scripting, data, web backends and automation.

9 lessons

Ruby

An expressive, developer-friendly language and the home of Ruby on Rails.

8 lessons

Rust

Memory-safe systems programming without a garbage collector.

9 lessons

Swift

Apple's modern language for iOS, macOS and server-side apps.

7 lessons

TypeScript

JavaScript with static types — interfaces, generics and safer large-scale apps.

8 lessons

Database Design

Normalization, indexing, transactions and schema design fundamentals.

7 lessons

MongoDB

A document-oriented NoSQL database built for flexible schemas and horizontal scale.

8 lessons

MySQL

The world's most popular open-source relational database.

7 lessons

Oracle Database

Oracle SQL and PL/SQL from first query to production tuning — analytic functions, stored procedures, tricky interview queries and a full worked project.

12 lessons

PostgreSQL

A powerful, standards-compliant open-source object-relational database.

7 lessons

Redis

An in-memory data store used for caching, queues, sessions and pub/sub.

7 lessons

SQL

Querying relational databases — SELECT, JOIN, aggregation and subqueries.

8 lessons

System Design

Learn how large-scale systems are actually built — scalability, caching, queues, and real case studies.

9 lessons

Java Developer Roadmap

A step-by-step path from Java basics to a job-ready backend engineer.

16 steps

Go Developer Roadmap

From your first "hello world" in Go to shipping concurrent, production-grade services.

14 steps

System Design Roadmap

The concepts and practice problems that come up in every system design interview and every real large-scale system.

10 steps