Developer Tutorials & Architecture
In-depth technical guides with prerequisites, copyable architectural code examples, best practices, and common mistakes to avoid.
Spring Boot REST API Tutorial
Build a production-grade, secure REST API with Spring Boot 3, Java 21, and Spring Data JPA from scratch.
Spring Boot JWT Authentication
Implement stateless JSON Web Token (JWT) authentication, refresh tokens, and Spring Security 6 authorization.
Spring Boot with PostgreSQL Database
Connect Spring Boot to PostgreSQL using HikariCP connection pooling, Docker, and Liquibase migrations.
Spring Boot with MongoDB
Build reactive and document-based microservices using Spring Data MongoDB and MongoRepository.
Spring Boot Unit Testing with JUnit 5 & Mockito
Write clean, robust unit and integration tests for Spring Boot controllers and services using Mockito and MockMvc.
Build REST API with FastAPI
Create high-performance, asynchronous REST APIs with Python 3, FastAPI, Pydantic, and Uvicorn.
Python Virtual Environments: venv & pip Best Practices
Master Python environment isolation using venv, requirements.txt, and modern package management.
Python JSON Processing: Parsing, Formatting, and Serialization
Master Python's json module: parse strings, handle files, customize encoders, and prevent KeyErrors.
Python Web Scraping with BeautifulSoup and Requests
Extract structured data, parse HTML DOM, and respect robots.txt using Python, Requests, and BeautifulSoup4.
JavaScript Async Await Masterclass
Understand the JavaScript event loop, microtask queues, error handling with try/catch, and Promise.all.
JavaScript Promises from Scratch
Deep dive into Promise states (pending, fulfilled, rejected), chaining, and combinators (all, race, any, allSettled).
TypeScript Beginner Guide: Type Safety for Modern Web Apps
Learn TypeScript fundamentals: interfaces, type aliases, generics, union types, and tsconfig settings.
React Hooks Comprehensive Guide
Master useState, useEffect, useRef, useMemo, useCallback, and building custom hooks with clean patterns.
React API Integration Best Practices
Fetch and synchronize REST APIs in React using fetch, TanStack React Query, loading skeletons, and error boundaries.
React with TypeScript: Complete Component Architecture
Type React components, custom hooks, event handlers, and context providers with TypeScript.
Angular Services and Dependency Injection
Design reusable singleton and transient services in Angular using Injectable, Signals, and RxJS.
Angular HTTP Client & Interceptors
Consume REST APIs in Angular using HttpClient, Bearer token interceptors, and RxJS error operators.
Node.js REST API with Express
Build a production-ready REST API from scratch with Node.js, Express, Helmet, Morgan, and error middleware.
Express.js Authentication with JWT & Bcrypt
Implement secure password hashing with bcrypt, JWT token issuance, and protected route middleware.
Docker Beginner Guide: From Code to Container
Master Docker fundamentals: images, containers, Dockerfiles, volumes, port mapping, and CLI commands.
Docker Compose for Multi-Container Environments
Orchestrate full-stack applications with web servers, databases, and caches using docker-compose.yml.
Kubernetes Beginner Guide: Architecture and Core Concepts
Learn Kubernetes fundamentals: Control Plane, Kubelet, Pods, Deployments, ReplicaSets, and Kubectl.
Kubernetes Deployment: Rolling Updates and Rollbacks
Deploy scalable, zero-downtime microservices using Kubernetes Deployments, rolling updates, and rollbacks.
Kubernetes Service: ClusterIP, NodePort, and LoadBalancer
Expose pods internally and externally using ClusterIP, NodePort, and cloud LoadBalancer services.
Kubernetes Ingress with NGINX Ingress Controller
Route external HTTP/HTTPS traffic to multiple backend services using URL paths, subdomains, and SSL/TLS.
Git Beginner Guide: Version Control Fundamentals
Learn Git from the ground up: init, stage, commit, status, log, diff, and remote repositories on GitHub.
Git Branching Strategies & Merge Workflows
Master Git feature branching, rebasing vs merging, fast-forward pulls, and resolving merge conflicts.
REST API vs GraphQL: Architectural Comparison
Compare REST and GraphQL: over-fetching, under-fetching, caching, type schemas, and performance benchmarks.
JWT Authentication Explained: Under the Hood
Understand JSON Web Token structure: Header, Payload, Signature, hashing algorithms, and XSS/CSRF mitigation.
Building an AI Chatbot with Streaming Responses
Build a modern, streaming AI chatbot in TypeScript using Server-Sent Events (SSE) and OpenAI API.