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Tutorials

Public study material, free for everyone. · 24

Microservices with Spring Cloud

Microservices · Advanced · 18 modules · 269 views

Build microservices with Spring Boot and Spring Cloud: service discovery, API gateway, config server, OpenFeign, Resilience4j, Kafka events, the Saga pattern, tracing, Docker and Kubernetes.

Learn Microservices

Spring Security

Spring Security · Intermediate · 22 modules · 277 views

Secure Spring Boot applications: the security filter chain, users and BCrypt passwords, roles and method security, JWT authentication with a React frontend, OAuth2 Google login, CORS, CSRF and best practices.

Learn Spring Security

Hibernate & JPA

Hibernate & JPA · Intermediate · 24 modules · 232 views

Learn Hibernate and JPA with Spring Data JPA: entity mapping, relationships, fetching and the N+1 problem, JPQL and Criteria queries, transactions, locking, caching and performance tuning.

Learn Hibernate & JPA

Spring Boot

Spring Boot · Intermediate · 30 modules · 315 views

Learn Spring Boot for Java full stack jobs: Spring Core and dependency injection, REST APIs, DTOs and validation, exception handling, databases, testing, caching, actuator and deployment, built around a real e-commerce project.

Learn Spring Boot

Kotlin

Kotlin · Beginner · 43 modules · 304 views

Learn Kotlin for Android and backend: null safety, functions, classes, data and sealed classes, collections, coroutines and Flow, with runnable examples, plus Jetpack Compose basics.

Learn Kotlin

Java

Java · Beginner · 50 modules · 351 views

Learn Java from scratch: syntax, OOP, collections, generics, exceptions, lambdas and streams, multithreading, the JVM and modern Java 21, with runnable examples and real output.

Learn Java

HTML

HTML · Beginner · 15 modules · 214 views

Learn HTML from scratch: elements, text, links, images, lists, tables, forms, media, semantic layout, accessibility and HTML APIs, with live examples.

Learn HTML

CSS

CSS · Beginner · 16 modules · 180 views

Learn CSS step by step: selectors, colors, the box model, text, layout with Flexbox and Grid, responsive design, animations and modern CSS, with live examples.

Learn CSS

Docker

Docker · Beginner · 11 modules · 176 views

Docker crash course: images, containers, Dockerfiles, volumes, networks, Docker Compose, registries, security and production practices.

Learn Docker

System Designing

System Designing · Beginner · 33 modules · 26K views

Day-1 : What is system Designing ? · Day-2 : Vertical vs. Horizontal Scaling · Day-3:How to do vertical scaling ? · Day4:How to do horizaontal scaling ? · Day:5TCP vs UDP

Learn System Designing

STAR (Situation, Task, Action, and Result)

Situation Based Questions · Beginner · 1 modules · 19K views

Full Stack STAR Questions

Learn Situation Based Questions

FastAPI

FAST API · Beginner · 13 modules · 143 views

FastAPI crash course: path and query parameters, Pydantic models, validation, dependencies, databases, authentication, testing and deployment, with real request/response examples.

Learn FAST API

Python

Python · Intermediate · 13 modules · 9.2K views

Python Fundamentals · Control Flow · Strings · Collections / Data Structures · Functions

Learn Python

JavaScript

JavaScript · Beginner · 26 modules · 10K views

JS Introduction · Variables & Data Types · Operators · Control Flow · Functions

Learn JavaScript

SQL

SQL · Intermediate · 26 modules · 9.6K views

Database · SQL · DDL · DQL · DML

Learn SQL

Django

Django · Beginner · 30 modules · 57K views

What is Django · Installing Django · Features of Django · MVT Architecture · Django vs Flask

Learn Django

Angular

Angular · Beginner · 28 modules · 1.7K views

Angular Fundamentals · Project Structure · Components & Templates · Data Binding · Directives

Learn Angular

AWS Crash Course

AWS · Advanced · 35 modules · 2.6K views

AWS

Learn AWS

System Architecture

System Architecture · Beginner · 53 modules · 7.6K views

Fundamentals of System Architecture · Distributed System Basics · System Reliability Concepts · Scaling Concepts · Networking Basics

Learn System Architecture

GCP Crash Course

Google Cloud Platform · Beginner · 13 modules · 160 views

Google Cloud crash course: projects and IAM, Compute Engine, Cloud Storage, Cloud Run, Cloud SQL, networking, GKE, serverless, monitoring and cost control.

Learn Google Cloud Platform

MongoDB — Documents & data modeling

MongoDB · Beginner · 20 modules · 8.2K views

Full MongoDB track: CRUD, operators, indexes, aggregation, schema design, Mongoose, replication, sharding, transactions, search, and ops.

Learn MongoDB

Express.js — Web APIs & middleware

expressjs · Intermediate · 18 modules · 6.9K views

Complete Express path: routing, middleware, validation, uploads, sessions, auth patterns, security, performance, and testing behind proxies.

Learn expressjs

Node.js — Server-side JavaScript

nodejs · Beginner · 29 modules · 2.4K views

Full Node.js curriculum: runtime, modules, npm, core APIs, streams, HTTP, processes, workers, security, and production operations.

Learn nodejs

React

React · Beginner · 35 modules · 1.6K views

Learn React step by step: components, JSX, every hook, props, forms and routing, then async code, virtualization, memory leaks, performance, the event loop, Redux and TypeScript, with live examples.

Learn React