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CS & Dev Notes

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--- Backend ---
Version 3 (Raw)
Version 2 (Modern)
Version 1 (Core)
--- DevOps ---
Version 2
Version 1
--- System Design ---
Version 2
Version 1
--- Operating System ---
Version 2
Version 1
--- DBMS ---
Version 2
Version 1
--- Computer Network ---
Version 2
Version 1

GitHub

Backend Engineering Roadmap & Big Picture
Backend Engineering Learning Approach
Backend Fundamentals: How Requests Flow & Why Backend Exists
Why Learn Backend from First Principles
HTTP Protocol Fundamentals (Backend Essentials)
Routing in Backend Systems
Authentication & Authorization — Detailed Learning Notes
API Validations & Transformations — Detailed Learning Notes
Handlers, Services, Repositories, Middleware & Request Context — Detailed Notes
Caching in Backend Systems
Background Jobs / Background Tasks in Backend
Full-Text Search & Elasticsearch – Structured Notes
Error Handling & Fault-Tolerant Mindset (Backend)
Configuration Management in Backend Systems
Logging, Monitoring, and Observability
Graceful Shutdown in Backend Systems
Serialization & Deserialization (Client–Server Communication)
Serialization Deep Dive for System Design (Interview + Real World)
API Design (REST) — Detailed Learning Notes
REST API Methods & API Design – Detailed Notes
11.3_Complete_REST_API_Design
Databases for Backend Systems
Building API Queries with PostgreSQL
Backend Database Queries, Indexes, and Triggers (Structured Notes)
Backend Security Fundamentals (Intro + Injection Attacks)
Authentication Security & Vulnerabilities
Advanced Security: Rate Limiting, Authorization & XSS
Scaling & Performance in Backend Systems
Scaling & Performance in Backend Systems (Part 2)
Scaling & Performance in Backend Systems (Part 3)
Backend Scaling & Performance – Structured Notes
Concurrency & Parallelism in Backend Systems
Concurrency Models, Event Loop & Race Conditions
Version Introduction

Version Introduction

Version Introduction

Welcome to Backend Engineering Version 3.

Curriculum

Roadmap
System Design

Community

GitHub