Crack LLD Interviews: Book + Practice Platform with Jatin Kaushal

Read the book, build the reflex — everything you need to walk into an LLD interview and see the pattern coming.

This bundle pairs the two halves of design-pattern mastery: the Design Patterns Handbook teaches you to recognize patterns, and CodeJunction (DSA-Meet-Design/Pro) makes recognition a reflex through 100+ hands-on problems from real interviews. Reading builds recognition; doing builds the reflex. You get both.

👀 Try both halves free before you buy:

- 📖 Read one full chapter → Handbook Preview

- ⚙️ Solve 20 problems free, no signup required → Link

💰 Buy separately = ₹1,398. Together = ₹1,199. Same method, end to end — theory to muscle memory.

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📖 Part 1 — The Design Patterns Handbook (PDF, instant download)

Most resources hand you a definition, a UML diagram, and a Shape → Circle/Square example you'll never see again. This book is built the opposite way: every

chapter drops you into a real company with a small ticket, piles on requirements until your clean code curdles into something painful — so you feel the problem

before we ever name the pattern you just reinvented.

- 16 chapters — a foundational principles chapter + 15 patterns (Strategy, Observer, State, Singleton, Factory, Composite, Decorator, Comparator, Command,

Builder, Adapter, Facade, Proxy, Template Method, Chain of Responsibility)

- ⭐ How each shows up in interviews — the trigger phrases interviewers actually use, and a "senior sentence" you can say out loud

- 🏭 Where each pattern lives in named production systems

- 🚫 When NOT to use it — over-engineering traps and the pattern it's most confused with

- 📄 A one-page recap per chapter to revisit before an interview

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⚙️ Part 2 — CodeJunction (DSA-Meet-Design/Pro) (private repo access, yours forever)

The handbook's practice path leads straight here — 100 machine-coding & LLD problems from real interviews at Amazon, Flipkart, Razorpay, PhonePe, Meesho, Swiggy,

Uber, Microsoft, and Google. Each starts with a base requirement, then throws the "now also support…" curveballs interviews are made of.

- 3 modes — Interview (blank slate), Guided (hints/shells), Learning (structure with TODOs)

- Dual-view editorials — LLD view, Machine Coding view, and the "Junction" design-decision breakdown

- 9 company tracks + a 6-week prep playbook, cheat sheets, and AI review prompts (50-point rubric)

- Local dashboard — React + Express, in-browser editor and test runner. No server, no login, no telemetry

- Languages: C++, Java, Python, JavaScript

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Who it's for: final-year students, new grads, and engineers with 1–5 years targeting product companies — anyone comfortable with OOP who wants to understand

patterns and drill them, not cram. Book examples are in Python; concepts carry to Java, C++, Go, any OO language.

👀 Want a taste first? Read the full Strategy chapter free → Free Preview (YOUR_PREVIEW_LINK)

How you get it: Instant PDF download for the Handbook + enter your GitHub username at checkout for a private CodeJunction invite (within minutes). One-time

purchase. No subscription. Yours forever, including every future update.

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