Everything About System Design
AmazonAmazonAmazonThe only system design resource that takes you from absolute zero to Staff Engineer level in one place. Not a course. Not a roadmap. A complete knowledge system. Covers LLD from SOLID principles to 20 real LLD case studies with full Java code. Covers HLD from CAP theorem to designing YouTube, Uber, WhatsApp, and Kafka at scale. Covers distributed systems internals - Raft, Paxos, CRDTs, Gossip Protocol, 2PC, Saga. Covers every interview pattern, every tradeoff, every real-world architectural decision. Built from Prince Singh's own experience designing systems for 600K+ users and from deep analysis of what FAANG interviews actually test in 2026.
9
Categories
76+
Patterns
380+
Questions
2026
Updated
Side-by-side comparison across 18 industry-critical features
System Design Leading Score
Content Depth
9.9
Industry Rel.
9.9
Production
9.8
Trend Align
9.8
Hiring Align
9.9
Practicality
9.8
Nobody covers distributed systems theory at this depth outside of academic papers and PhD coursework. Raft + Paxos + CRDTs + Vector Clocks + Gossip Protocol + 2PC vs Saga - all in one category with interview-ready context. This is what separates Senior from Staff engineer answers.
Dynamo, Bigtable, Facebook Memcached, Spanner, Kafka, TAO, Zanzibar, GorillaDB - each explained with problem statement, key innovations, impact, and interview gold. Referencing papers casually in interviews is the strongest Staff-level signal. No other non-academic resource covers all 8.
20 complete LLD designs - Parking Lot, Splitwise, BookMyShow, Notification System, Rate Limiter, Uber, Google Docs, Hotel Booking, Payment Gateway, Google Drive - each with full compilable Java code. InterviewReady has zero code. This is a complete monopoly.
URL Shortener, WhatsApp, YouTube, Twitter, Uber, Google Maps, Hotstar Live Streaming, Recommendation Engine, Payment Gateway, Ad Click Aggregator, Kafka design, Gmail, Google Drive, Stock Exchange, Tinder, Chess Platform, Cab Aggregator - each with capacity estimation, API design, architecture, deep dives, and tradeoffs.
Scoring rubric mapped to SDE-1/Senior/Staff/Principal levels. Company-specific patterns for Amazon, Google, Meta, Netflix, Uber. Prince Singh's real production learnings from a 600K-user Multi-LLM platform. The meta-skills that convert knowledge into interview offers.
LSM Tree vs B-Tree internals explain WHY Cassandra outperforms MySQL on writes. Consistent hashing with virtual nodes. CAP theorem with CP vs AP decision framework. ACID isolation levels with real anomaly examples. Database selection decision tree. Nobody else teaches the internals at this depth.
Full Java Code for Every LLD Design (20 Designs)
HLD Case Studies Count (20 complete designs)
Distributed Systems Theory (Raft, Paxos, CRDTs, 2PC, Saga)
Research Paper Deep Dives (8 papers: Dynamo, Spanner, Kafka, TAO, Zanzibar...)
Capacity Estimation with Real Worked Examples
Interview Scoring Rubric by Seniority (SDE1 → Staff → CTO)
Company-Specific Patterns (Amazon, Google, Meta, Netflix, Uber)
Storage Engine Internals (LSM Tree vs B-Tree, WAL, SSTable)
Real Production Experience Grounding (600K+ user platform)
Beyond Surface-Level Theory
Most courses show you diagrams and buzzwords. This resource teaches you WHY every decision is made — from LLD class design to Raft consensus, from capacity estimation to reading Dynamo's original paper.
Generic System Design Courses
Theory without depth, diagrams without decisions
HLD only — LLD rounds ignored entirely
Common gap across InterviewReady, Udemy, YouTube tutorials
Diagrams without capacity estimation or tradeoffs
Common gap across InterviewReady, Udemy, YouTube tutorials
No distributed systems theory (Raft, Paxos, CRDTs never explained)
Common gap across InterviewReady, Udemy, YouTube tutorials
Research papers mentioned but never deep-dived
Common gap across InterviewReady, Udemy, YouTube tutorials
Generic designs — no company-specific vocabulary
Common gap across InterviewReady, Udemy, YouTube tutorials
No interview scoring rubric by seniority level
Common gap across InterviewReady, Udemy, YouTube tutorials
Everything About System Design
LLD · HLD · Distributed Systems · Research Papers
20 LLD Designs with Full Java Code
Parking Lot, Splitwise, BookMyShow, Rate Limiter, Google Docs — every design with compilable production-quality Java. InterviewReady has zero code.
20 HLD Case Studies — API + Capacity + Tradeoffs
URL Shortener, WhatsApp, YouTube, Uber, Kafka, Google Drive — each with real capacity estimation, API contracts, architecture, and deep dives.
Distributed Systems Theory Nobody Else Teaches
Raft, Paxos, CRDTs, Vector Clocks, Gossip Protocol, 2PC vs Saga — the depth that separates Senior from Staff engineer answers.
8 Research Paper Deep Dives
Dynamo, Bigtable, Memcached, Spanner, Kafka, TAO, Zanzibar, GorillaDB — each with key innovations and interview-ready talking points.
Interview Scoring Rubric by Seniority
Exactly what interviewers score at SDE-1, Senior, Staff, and Principal. Company-specific patterns for Amazon, Google, Meta, Netflix, Uber.
Real Production Grounding — 600K+ User Platform
Every concept anchored in real decisions from Prince Singh's own Multi-LLM platform. Theory meets production reality.
What's Inside
System Design Foundations
Beginner - Mid
Low Level Design (LLD)
Beginner - Senior
Database Internals & Selection
Mid - Senior
Distributed Systems Theory
Senior - Staff
Core Infrastructure Components
Mid - Senior
System Design Patterns & Architecture
Senior - Staff
High Level Design (HLD) Case Studies
Mid - CTO
Interview Mastery & Real World
All levels
Research Papers Deep Dive
Senior - Staff - Principal
How to Use This Product
0–2 YOE
Start with Category 1 (Foundations) completely. Then Category 2 (LLD) fully. LLD rounds come before HLD. Category 3 after LLD is solid.
2–5 YOE
Fill LLD gaps with Category 2. Deep dive Category 3 and 5. Focus on Category 7 HLD case studies.
5–8 YOE
Category 4 (Distributed Systems) is your battlefield. Category 6 (Architecture Patterns) and 7 (HLD). Category 8 research papers.
Staff / CTO
Category 4, 6, 8 are primary. Every HLD - go beyond the answer, challenge the design, identify failure modes, propose alternatives.
Key Features
- Only resource covering LLD + HLD + Distributed Systems Theory + Research Papers in one unified product
- Every concept: WHY (first principles) + WHAT (definition) + HOW (implementation) + WHEN (decision criteria) + INTERVIEW (what earns points)
- 20 complete LLD designs with full Java implementation - not pseudocode
- 20 complete HLD designs with capacity estimation, API contracts, architecture, deep dives, and tradeoffs
- 8 must-read research paper deep dives - Dynamo, Bigtable, Facebook Memcached, Spanner, Kafka, TAO, Zanzibar, GorillaDB
- Distributed systems theory: Raft, Paxos, CRDTs, Gossip Protocol, 2PC, Saga, Vector Clocks, Probabilistic Data Structures
- Real-world context - every concept grounded in ProPeers, Swiggy, Razorpay, Flipkart-scale decisions
- Capacity estimation with real numbers and worked examples - not vague hand-waving
- System design interview scoring rubric - what interviewers actually score at each seniority level
- Company-specific patterns - Amazon, Google, Meta, Netflix, Uber vocabulary, tools, and what they care about
Market Demand - Who's Hiring
Amazon