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Introduction to Computer Networking
Module 2: IP Addressing, Subnetting & Routing
Module 1: Basics & the Layered Models
Module 4: DNS, HTTP & TLS - the Application Layer
Module 5: Firewalls, NAT, VPNs & Load Balancing
Module 6: Networking for System Design Interviews
Module 3: TCP & UDP - the Transport Layer
config
How to Manage Multiple GitHub Accounts on One Computer using SSH
database
Database Management Systems Interview Handbook
SQL Interview Handbook: From MariaDB Setup to Advanced Query Patterns
DevOps
docker
k8s
AWS Hands-On for DevOps — VPC, IAM, EC2, Load Balancers, S3, RDS, EKS, and Troubleshooting
CI/CD Pipelines — GitHub Actions, Jenkins, Deployment Strategies, GitOps, and DORA Metrics
Cloud Computing: From First Principles to Interview Confidence
DevOps Scenarios, Interview Question Bank, and Capstone Project
Git and Version Control for DevOps — Branching, Merge vs Rebase, Undoing Mistakes, and Team Workflows
Introduction to DevOps
Kubernetes Production Guide — Probes, Resources, Rollouts, Security, Gateway API, GitOps, and Troubleshooting
Linux for DevOps — Permissions, Processes, systemd, Networking, Performance Troubleshooting, and Playbooks
Monitoring and Logging — Prometheus, Grafana, Alertmanager, Loki, ELK, and OpenTelemetry in Practice
Shell Scripting for DevOps
Shell Scripting for DevOps
Terraform and Infrastructure as Code — State, Modules, Environments, CI Workflows, and Ansible
OOP Mastery for MAANG Interviews
Module 1: Classes, Objects & Memory
Module 2: Encapsulation & Data Hiding
Module 3: Inheritance & Composition
Module 4: Polymorphism & Abstraction
Module 5 (Part 1): SOLID Principles & Design Patterns
Module 5 (Part 2): Design Patterns, Principles & the LLD Interview Playbook
operating systems
Operating Systems Interview Handbook: From Fundamentals to Whiteboard-Ready Answers
socketio
Introduction to Socket-io
System Design Overview
API Gateway
Authentication and Security in System Design — Sessions, JWT, OAuth, Authorization, and Common Attacks
Caching and CDN — Speeding Up Systems at Every Layer
System Design Cheat Sheet — Numbers, Formulas, Trade-offs, and Practice Questions
Circuit Breaker Pattern
CQRS and Event Sourcing
Databases in System Design — SQL, NoSQL, Indexing, Transactions, Replication, Sharding, and CAP
Distributed Systems Essentials — Transactions, Consensus, Leader Election, Locks, Clocks, and IDs
Domain Name System (DNS) — How the Internet's Phone Book Works
Event-Driven Architecture
System Design Case Study — File Storage and Sync (Dropbox / Google Drive)
High Availability
Load Balancing — Distributing Traffic for High Availability and Scale
Message Queues, Kafka, Pub/Sub, Real-Time Communication, and REST vs gRPC — Communication Patterns in System Design
Microservices Architecture
Monolithic Architecture
System Design Case Study — Netflix (Video Streaming at Global Scale)
IP Addresses, OSI Model, TCP and UDP — Networking Fundamentals for System Design
System Design Case Study — Notification System (Push, SMS, Email at Scale)
Observability and Deployment — Metrics, Logs, Traces, SLOs, Safe Releases, and Disaster Recovery
System Design Case Study — Distributed Rate Limiter
Rate Limiting
Vertical vs Horizontal Scaling
How to Ace System Design Interviews — A Complete Framework and Checklist
System Design Case Study — Ticket Booking System (BookMyShow / Ticketmaster)
System Design Case Study — Twitter (Social Media at Scale)
System Design Case Study — Search Autocomplete (Typeahead Suggestions)
System Design Case Study — Uber (Ride-Hailing at Global Scale)
System Design Case Study — URL Shortener (like Bitly or TinyURL)
System Design Case Study — Web Crawler (Search Engine Crawling at Scale)
What is System Design?
System Design Case Study — WhatsApp (Instant Messaging at Scale)
Web Vulnerabilities Overview
Clickjacking Vulnerability
Cross-Site Request Forgery (CSRF)
Host Header Injection
HTTP Request Smuggling
JWT Vulnerabilities
LLM Security Vulnerabilities
Mastering Web Security: Complete PortSwigger Academy Lab Solutions
Prototype Pollution
Web Cache Deception
Web Cache Poisoning
C++ STL for Competitive Programming: From Basics to Contest-Ready Speed
C++ to Java and JavaScript: Competitive Programming Tutorial
DSA Pattern Index: Complete Field Manual
Advanced Bug Bounty Hunting Methodology
Custom Nuclei Templates in Bug Bounty Hunting
Mastering Google Dorks for Passive Reconnaissance
Identifying Tech Stacks via Session Tokens