Mastering SOLID Principles for Backend & Spring Boot (LLD Interviews)

3.12 A simple end to end framework for modeling any feature

Pagination — Why We Do Not Show Huge Data All at Once | HLD Ep 3.11

Sorting and Ordering — Why "Show Latest First" Is Not a Small Detail | HLD Ep 3.10

Indexing — How to Find Data Faster When Records Become Large | HLD Ep 3.9

Mapping Table — How to Represent Many-to-Many Connections Cleanly | HLD Ep 3.8

Foreign Key — How One Record Points to Another Record | HLD Ep 3.7

Primary Key — Why Every Record Needs a Clear Identity | HLD Ep 3.6

SQL Joins Explained: INNER, LEFT, RIGHT, FULL OUTER & SELF JOIN

Data Relationships — How Different Pieces of Data Connect to Each Other | HLD Ep 3.5

Structured vs Unstructured Data — Why All Data Does Not Look the Same | HLD Ep 3.4

Hot Data vs Cold Data — Why All Stored Data Doesn't Need the Same Speed | HLD Ep 3.3

Why Reads and Writes Create Different Kinds of Pressure | HLD Ep 3.2

Why "How Much Data?" Matters Before Designing Any Big System | HLD Ep 3.1

Explained the Entire Backend in One Video | Load Balancer, API Gateway, JWT, gRPC, MCP

From App Open to Server Response — The Full Request Journey Explained | HLD Ep 2.7

Why Your Game Doesn't Lag Every Second — DNS Caching Explained Simply | HLD Ep 2.6

"Why DNS is Distributed Instead of Centralized | System Design Ep 2.5"

How REST APIs Actually Work (Backend Engineering Guide)

Why DNS Uses Multiple Servers (Not One) Bottleneck & Single Point of Failure Explained | HLD Ep 2.4

Why We Use Domain Names Instead of IP Addresses — DNS Explained with a Gaming Example | HLD Ep 2.3

How Your Phone Connects to the Internet — ISP, Router & Latency Explained Simply | HLD Ep 2.2

Networking Basics Every Backend Developer Must Know — IP, DNS & How the Internet Works | HLD Ep 2.1

Stop Memorizing System Design Jargon — Do This Instead (HLD Learning Strategy) | Ep 1.3

What is System Design Actually Solving? The Real Mindset Behind HLD | System Design Ep 1.2

LRU Cache Explained in 5 Minutes — Why Netflix Deletes Your Watch History (System Design)

What is High Level Design? System Design for Complete Beginners (HLD Explained) 1.1

System Design Interview: Design Swiggy Step-by-Step (High Level Design Explained)

Kubernetes Explained in 7 Minutes — Beginner's Guide to K8s (No Fluff)

Docker Crash Course: Containers vs VMs Explained (What Every Dev Must Know)

Why Systems Crash in Production — Logging & Monitoring Explained Visually

Cracking the Mobile System Design Interview

Mobile System Design Blueprint

News Feed App System Design

Designing a Hotel Booking App

Building the Infinite Scroll Engine

Building Mobile Apps

Design a Chat App

Stock App System Design

Designing Google Drive