From the First Principles

Insights, discoveries, and deep dives from my daily learning adventures

17 Jan 2026•General

Mastering Authentication & Authorization in Modern Backend Systems

Explore the evolution, types, and best practices of authentication and authorization in modern backend systems. Learn how to secure your applications effectively.

#Authentication#Authorization#JWT#OAuth 2.0

Understanding Serialization and Deserialization with JSON

Learn about serialization and deserialization in client-server communication, focusing on JSON as the most popular data format for seamless data exchange across languages.

#Serialization#Deserialization#JSON#Client-Server Communication#Data Exchange#Cross-Language Data Exchange

Understanding HTTP from Scratch

HTTP Explained Like You are Building Real Backends - A friendly deep dive into protocols, headers, methods, CORS, caching, and security.

#HTTP#Protocol#Headers#Methods#CORS#Caching#Security

Demystifying Large Language Models: How ChatGPT Works

Discover how transformer models like GPT work internally—from tokenization to attention mechanisms—and understand the key concepts behind large language models.

#Transformers#Attention Mechanism#Word Embeddings#Large Language Models