🎉 "Selected for SDE-2 role at Amazon!" — Our Student, 1st LLD Cohort →
🚀 New Live Cohort Launched Check Batches— Limited Seats only Enroll Now

Crack System Design Interviews at
Top Product-based Companies

Built for engineers who want offers—not just knowledge. A structured 8-Week Live Cohort that teaches you how top companies expect candidates to think, design, and communicate.

500+ engineers mentored across cohorts

Live Class Live Class Live Class Live Class Live Class Live Class Live Class Live Class Live Class
82K+ Instagram
15K+ LinkedIn
5+ Yrs Experience
🎉 Huge Win! Our LLD student just cracked Amazon SDE-2
Student placed at Amazon SDE-2

Our student just cracked

Amazon SDE-2

"I was part of your 1st LLD cohort. Just wanted to let you know I have been selected for SDE2 role at Amazon. Your LLD course has really helped in many ways and I'm thankful to you." 🚀

Join the Next Batch →
🎉 Huge Win! Our student just cracked Amgen
Ajay placed at Amgen as Principal Solution Architect

Our student just cracked

Principal Solution Architect, Amgen

"Pradeep's LLD and HLD sessions in the CohortbyPradeep were practical, structured, and incredibly valuable. They strengthened my system design skills and played an important role in my interview preparation. Happy to share that I recently secured a Principal Solution Architect role at Amgen. Thanks, Pradeep." — Ajay 🚀

Join the Next Batch →
🎉 One of my student recently cracked Rubrik
Student placed at Rubrik

Our student just cracked

Rubrik

"The 5-step framework alone was worth it. I used it in my Rubrik interview and cleared the LLD round on the first attempt." — Bhavy Ramani, SDE-2, Rubrik 🚀

Join the Next Batch →
🏗️ Live HLD Cohort starts 1st August — Sat & Sun · 4–6 PM IST · Limited seats
--Days
:
--Hours
:
--Mins
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Grab Your Seat →
4.9/5 average rating
🎓 500+ engineers mentored
💼 Trusted by IIT/NIT/IIIT graduates

You Can Design & code. But You're Still Failing System Design Rounds.

The biggest difference between an average engineer and someone who clears top product company LLD & HLD interviews isn't knowledge—it's having a proven framework to think, design, and communicate under pressure.

Without a Framework

  • Panic when asked to design a system from scratch
  • Know patterns but can't apply them under pressure
  • Skip clarifications, jump to code/design too fast
  • Can't explain trade-offs convincingly
  • Freeze on extensibility / SOLID questions and Cross-questions

After This Course

  • ✅ Proven framework to approach any LLD or HLD interview problem
  • ✅ Design scalable, maintainable, and extensible systems with confidence
  • ✅ Master a structured approach from requirements to solution design
  • ✅ Communicate trade-offs and design decisions like a senior engineer
  • ✅ Build interview-ready solutions that top product companies expect

Live Cohort's Available

Two structured live cohort — pick the one that fits your interview goal.

🏗️ Live HLD Cohort

8-Week Live HLD Cohort to Crack System Design Interviews

Build a rock-solid System Design foundation and master the concepts required to confidently design real-world systems like YouTube, Twitter, Payment Gateways, and many more. Along with strong conceptual fundamentals, we'll cover 15+ of the most important System Design interview questions and conduct mock interviews to help you think, communicate, and perform like you're in an actual interview.

  • How to approach any HLD interview in top product-based companies
  • CAP theorem, consistency models (eventual, strong, linearizable) 🎯 Asked at Amazon
  • SQL vs NoSQL — when and why
  • Back-of-envelope estimation (QPS, storage, bandwidth) 🎯 Asked at Google
  • API Design, Data Model
  • Networking Concepts, Load balancers (L4 vs L7, consistent hashing)
  • CDN, DNS, Reverse proxies 🎯 Asked at Netflix
  • Caching strategies (write-through, write-back, cache-aside, TTL)
  • Redis deep dive — data structures, eviction policies, pub/sub [Live Demo of Redis and usecases] 🎯 Asked at Spotify
  • Sharding strategies (range, hash, directory-based) 🎯 Asked at Microsoft
  • Replication (leader-follower, multi-leader, leaderless)
  • Database indexing internals (B-Tree, LSM tree)
  • Message queues & event-driven architecture (Kafka, SQS) 🎯 Asked at Uber
  • Async processing, fan-out patterns
  • Concept: Rate limiting at scale (Token Bucket, Sliding Window at distributed level)
  • Design: URL Shortener (hashing, redirection, analytics) 🎯 Asked at Flipkart
  • Design: Rate Limiter (Token Bucket, Sliding Window — distributed) 🎯 Asked at Razorpay
  • Design: Search Autocomplete (Trie at scale, typeahead service)
  • Concept: Circuit breaker, bulkhead, retry with backoff
  • Design: Twitter / Instagram Feed (newsfeed, fan-out) 🎯 Asked at Meesho
  • Design: YouTube / Netflix (video upload, streaming, CDN)
  • Design: WhatsApp / Messaging System (real-time, delivery receipts)
  • Concept: WebSockets, Server-Sent Events & Long Polling — real-time communication trade-offs
  • Design: Key-Value Store (like DynamoDB / Redis) [Live Demo]
  • Design: Distributed Cache (eviction, consistency, partitioning)
  • Design: Notification System (multi-channel: push, SMS, email at scale) [Live Demo] 🎯 Asked at Swiggy
  • Concept: Geospatial indexing — Geohashing, QuadTrees, and Uber's H3 for location-based search
  • Design: Uber / Ride-Sharing (geo-indexing, matching, surge pricing) 🎯 Asked at Zomato
  • Design: Google Maps (routing, geo-search, map tiles)
  • Design: Distributed Task Scheduler (priority queues, retries, delayed jobs)
  • Concept: Distributed transactions (2PC, Saga pattern) & Idempotency, exactly-once semantics
  • Design: Payment System / UPI-like Gateway (idempotency, Saga) 🎯 Asked at PhonePe
  • Design: Leaderboard / Distributed Counters (real-time ranking) [Live Demo using Redis]
  • Design: Logging & Monitoring System (log aggregation, alerting)
  • 2-3 full mock HLD interviews 1:1 with feedback + Google/Microsoft/Amazon/Confluent company-specific sheet
  • Design URL Shortener (hashing, redirection, analytics) 🎯 Asked at Flipkart
  • Design Twitter / Instagram Feed (newsfeed, fan-out) 🎯 Asked at Meesho
  • Design YouTube / Netflix (video upload, streaming, CDN) 🎯 Asked at Netflix
  • Design WhatsApp / Messaging System (real-time, delivery receipts) 🎯 Asked at Microsoft
  • Design Uber / Ride Sharing (geo-indexing, matching, surge pricing) 🎯 Asked at Zomato
  • Design Google Maps (routing, geo-search, map tiles) 🎯 Asked at Google
  • Design Notification System (multi-channel: push, SMS, email at scale) 🎯 Asked at Swiggy
  • Design Rate Limiter (Token Bucket, Sliding Window — distributed) 🎯 Asked at Razorpay
  • Design Key-Value Store (like DynamoDB / Redis) 🎯 Asked at Amazon
  • Design Distributed Cache (eviction, consistency, partitioning) 🎯 Asked at Uber
  • Design Search Autocomplete (Trie at scale, typeahead service) 🎯 Asked at Google
  • Design Payment System / UPI-like Gateway (idempotency, Saga) 🎯 Asked at PhonePe
  • Design Distributed Task Scheduler (priority queues, retries, delayed jobs) 🎯 Asked at Spotify
  • Design Leaderboard / Distributed Counters (real-time ranking at scale) 🎯 Asked at Netflix
  • Design Logging & Monitoring System (log aggregation, alerting) 🎯 Asked at Microsoft
⚙️ LLD Program

8-Week Low Level Design (LLD) Program

Master object-oriented design, design patterns, and 15+ real interview problems — coded live.

  • OOP mastery: abstraction, encapsulation, polymorphism 🎯 Asked at Flipkart
  • SOLID Principles — applied, not theoretical 🎯 Asked at Microsoft
  • 5-step LLD interview framework
  • Creational: Singleton, Factory, Builder, Prototype
  • Structural: Adapter, Decorator, Facade, Proxy, Composition 🎯 Asked at Swiggy
  • Behavioral: Observer, Strategy, Chain of Responsibility, state 🎯 Asked at Zomato
  • Pattern selection under interview conditions
  • Concurrency Control for LLD, [Thread, Locks, ReadWriteLock, ThreadPool, ExecutorService, Producer-Consumer, Task Schedular] ✨ New
  • Chess, Snake & Ladder, Tic-Tac-Toe 🎯 Asked at Google
  • Parking Lot, Elevator, Trading System 🎯 Asked at Amazon
  • Splitwise, Food Delivery, Ride Sharing
  • LLD of Kafka, Payment Gateway
  • Design LRU Cache (HashMap + Doubly Linked List, O(1) operations) 🎯 Asked at Uber
  • Design Rate Limiter (Token Bucket, Leaky Bucket, Sliding Window) 🎯 Asked at Razorpay
  • Design Task Scheduler (priority-based execution, delayed jobs, retries)
  • Design Notification System (multi-channel: email, SMS, push)
  • Design Logging Framework (log levels, appenders, extensibility)
  • Design In-Memory File System (directories, files, operations)
  • Design Vending Machine (state machine, inventory, payment handling)
  • Full 1-on-1 mock interview sessions
  • Personalized feedback & improvement plan
  • Design Chess (board state, moves, check/checkmate) 🎯 Asked at Google
  • Design Snake & Ladder (game engine, dice, board state) 🎯 Asked at Flipkart
  • Design Tic-Tac-Toe (game engine, win detection) 🎯 Asked at Amazon
  • Design Parking Lot (multi-floor, vehicle types, pricing) 🎯 Asked at Amazon
  • Design Elevator System (scheduling, multi-car dispatch) 🎯 Asked at Zomato
  • Design Trading System (order matching, order book) 🎯 Asked at Microsoft
  • Design Splitwise (expense splitting, debt simplification) 🎯 Asked at PhonePe
  • Design Food Delivery System (order tracking, dispatch) 🎯 Asked at Swiggy
  • Design Ride-Sharing System (matching, pricing, tracking) 🎯 Asked at Uber
  • Design Kafka (partitions, offsets, consumer groups) 🎯 Asked at Uber
  • Design Payment Gateway (idempotency, retries, ledger) 🎯 Asked at Razorpay
  • Design LRU Cache (HashMap + Doubly Linked List, O(1) ops) 🎯 Asked at Uber
  • Design Rate Limiter (Token Bucket, Sliding Window) 🎯 Asked at Razorpay
  • Design Task Scheduler (priority execution, delayed jobs) 🎯 Asked at Spotify
  • Design Notification System (multi-channel: email, SMS, push) 🎯 Asked at Swiggy
  • Design Logging Framework (log levels, appenders, extensibility) 🎯 Asked at Microsoft
  • Design In-Memory File System (directories, files, operations) 🎯 Asked at Netflix
  • Design Vending Machine (state machine, inventory, payment) 🎯 Asked at Meesho

Hi, I'm Pradeep Kumar

Pradeep Kumar
Senior Backend Engineer

I'm a Senior Backend Engineer with 5+ years of experience building large-scale distributed systems — and a graduate from IIIT Delhi. I've worked at product-based companies like NetApp and Qualcomm, shipping systems that handle real-world scale and reliability challenges.

My backend work spans distributed systems — designing fault-tolerant services, working with consensus, concurrency primitives, and high-throughput data pipelines — the same depth interviewers probe in both LLD and HLD rounds at senior levels.

I've personally cleared LLD and HLD rounds at top product companies — and beyond that, I've taught 500+ engineers: SDE-1s, SDE-2s, Staff Engineers, and Cloud Architects across cohorts. I've helped 100+ students land offers at companies like Rubrik, Swiggy, Razorpay, and FAANG.

What I've seen consistently: engineers don't fail system design rounds because they can't code or think. They fail because nobody ever gave them a repeatable structure to clarify, design, and communicate under pressure — whether it's LLD or HLD.

"Engineers don't fail design interviews because they lack knowledge. They fail because they don't have a clear framework to think, communicate, and defend decisions under pressure."

These cohorts are the distillation of everything I wish I had — and everything I've refined across 500+ students preparing for both LLD and HLD rounds.

500+Engineers Taught
100+Placements Helped
5+Years Industry Exp.

Student Testimonials

Real feedback from Experienced engineers

Student testimonial
Student testimonial
Student testimonial
★★★★★

"The 5-step framework alone was worth it. I used it in my Rubrik interview and cleared the LLD round on the first attempt."

Bhavy Ramani SDE-2, Rubrik
★★★★★

"LLD played the major role getting both offers. Thanks to your teaching I was super confident in LLD rounds"

Munmun Chowdhary SDE-3
★★★★★

"After 1 year of struggle got an offer, thanks alot pradeep your course helped a lot"

Ashish Jaiswal SDE-2
Shaheen Shaikh testimonial
Ajay Kotnala testimonial
Hariram Sahani testimonial
Khalid testimonial
Neha Narayan testimonial

Swipe to see more reviews →

Swipe to see more reels →

Asked at Top Product Companies

Where HLD & LLD Rounds Actually Happen

These companies conduct dedicated system design + low level design rounds for SDE-2 and above roles

Amazon
Amazon
HLDLLD
Google
Google
HLDLLD
Microsoft
Microsoft
HLDLLD
Uber
Uber
HLDLLD
Flipkart
Flipkart
HLDLLD
Spotify
Spotify
HLD
Razorpay
Razorpay
HLDLLD
Swiggy
Swiggy
HLDLLD
Zomato
Zomato
HLDLLD
PhonePe
PhonePe
LLD
Meesho
Meesho
HLDLLD
Netflix
Netflix
HLD

+ 50 more companies including Paytm, CRED, Groww, Ola, Dunzo, Atlassian & more

Choose Your Batch

Two flexible formats — pick what fits your schedule and goal.

🏗️

HLD Live Cohort Weekend Batch

Sat-Sun  ·  4 – 6 PM IST  ·  Starts 1st August

🔥 Seats Filling Fast
🏗️ 8-Week Live HLD Program

High Level Design (HLD) Live Cohort - Weekend Batch

System Design · Interview-focused · Live

🗓️ Weekend Batch 📅 Starts 1st August Sat-Sun · 4 – 6 PM IST
₹9,999

🔥 Only last few seats left — previous batches sold out in days. Secure yours before it's gone.
  • ✅ 8 weeks of live HLD sessions with Mock Interviews
  • ✅ CAP theorem, consistency models, SQL vs NoSQL
  • ✅ Load balancers, CDN, Redis, Kafka deep dives
  • ✅ Design: YouTube, Twitter, Payment Gateway, URL Shortener & more
  • ✅ Distributed transactions, Circuit breakers, Saga pattern
  • ✅ 3 full mock HLD interviews with peers and my feedback
  • ✅ 1:1 personalized guidance
  • ✅ Lifetime access to all recordings
  • ✅ Exclusive Alumni community access for referrals and opportunities
  • ✅ Certificate of completion
Enroll Now [Limited Seats]

Pay once. Access forever.

💡 One HLD round cleared = ₹10–30L salary jump. This course pays for itself on the first day of a better offer.

Why HLD matters

HLD is the round that separates good engineers from great ones

Every product company above SDE-2 uses system design to filter candidates. This is where offers are won or lost.

🚪
The gatekeeping round at every top company

Google, Amazon, Flipkart, Swiggy, Razorpay, Confluent — all of them use HLD to filter SDE-2 and above. You cannot get to offer stage without clearing this round.

📐
A framework, not memorisation

Most engineers try to memorise system designs. That doesn't work — interviews throw curveballs. You'll learn the clarify → estimate → design → deep dive framework so you can crack any problem cold.

🏗️
Real systems, built live in class

YouTube, Twitter feed, Payment gateway, URL Shortener — the exact problems companies ask. You'll watch Pradeep design them live, think through trade-offs, and defend decisions the way interviewers expect.

Covers what no YouTube video does

Distributed transactions, Saga pattern, Circuit breakers, Sharding internals, CAP theorem applied — the depth interviewers actually probe at senior levels.

💰
One round that can move your comp by 30–50%

Clearing HLD unlocks SDE-2, SDE-3, and Staff roles. The salary jump from cracking this one round often covers 10× the course fee in the first month.

OR
🌙

HLD Weekday Batch

Monday & Wednesday  ·  8–9:30 PM IST  ·  Starts 17th August

🔴 Seats Filling Fast
🏗️ 8-Week Live HLD Program — Weekday

High Level Design (HLD) Live Cohort — Weekday Batch

Fast-paced · System Design · Interview-focused · Live

🌙 Weekday Batch 📅 Starts 17th August Mon & Wed · 8–9:30 PM IST
₹9,999

⚠️ Only Few Seats remaining for Live Cohort

  • ✅ 8 weeks of live HLD sessions with Mock Interviews
  • ✅ CAP theorem, consistency models, SQL vs NoSQL
  • ✅ Load balancers, CDN, Redis, Kafka deep dives
  • ✅ Design: YouTube, Twitter, Payment Gateway, URL Shortener & more
  • ✅ Distributed transactions, Circuit breakers, Saga pattern
  • ✅ 3 full mock HLD interviews with peers and my feedback
  • ✅ 1:1 personalized guidance
  • ✅ Lifetime access to all recordings
  • ✅ Exclusive Alumni community access for referrals and opportunities
  • ✅ Certificate of completion
Enroll Now — ₹9,999

Pay once. Access forever.

💡 One HLD round cleared = ₹10–30L salary jump. This course pays for itself on the first day of a better offer.

What makes this different?

🎯
Interview-first approach

Every session is designed around what interviewers at Google, Amazon, Flipkart, and FAANG actually test.

🧠
Live, not recorded

You learn by watching Pradeep think out loud in real-time. No polished YouTube tutorials — raw, authentic problem-solving.

🔁
Access to recordings

Miss a session? Re-watch before your next interview. The recordings are yours forever.

OR
🌙

LLD Weekday Batch

Tues-Thursday  ·  8:00 – 9:30 PM IST  ·  Starts 17th August

🔴 Seats Filling Fast
🔥 Investment which you can earn in 1 Day

Live LLD Weekday 3.0 Cohort

Fast-paced · Interview-focused · Live

🌙 Weekday Batch 📅 Starts 17th August Tues-Thursday · 8:00 – 9:30 PM IST
₹10,999 ₹7,999

⚠️ Only Few Seats remaining for Live Cohort

  • ✅ 8 weeks of live weekday sessions (8–9:30 PM IST)
  • ✅ 15+ LLD problems asked in top product based companies live coded with detailed explaination
  • ✅ Design patterns deep dive, Decorator, State, facade, proxy, builder, composition and many more
  • ✅ SOLID principles + OOP mastery
  • ✅ Concurrency Control for LLD, [Thread, Locks, ReadWriteLock, ThreadPool, ExecutorService, Producer-Consumer, Task Schedular] ✨ New
  • ✅ 1:1 personalized guidance and Referrals
  • ✅ Lifetime access to all recordings
  • ✅ Exclusive student community access for referral and job updates
  • ✅ Doubt-clearing sessions
  • ✅ Certificate of completion
  • ✅ Access to other batches recordings
Enroll Now — ₹7,999

Pay once. Access forever. Satisfaction guaranteed.

💡 One LLD round cleared = ₹5–15L salary jump. This course pays for itself on the first day of a better offer.

What makes this different?

🎯
Interview-first approach

Every session is designed around what interviewers at Flipkart, Swiggy, Razorpay, and FAANG actually test.

🧠
Live, not recorded

You learn by watching Pradeep think out loud in real-time. No polished YouTube tutorials — raw, authentic problem-solving.

🔁
Access to recordings

Miss a session? Re-watch before your next interview. The recordings are yours forever.

OR
☀️

Live LLD Weekend 4.0 Cohort

Sat / Sun  ·  1.5 hrs/class  ·  Enrolments open — Live Classes begin 15th August

🆕 New Batch
🗓️ Live LLD Weekend 4.0 Cohort

LLD Live Cohort

Weekend · Interview-focused · Live

🗓️ Weekend Batch 📅 Starts 15th August Sat & Sun · 11 AM IST · 1.5 Hr LLD
₹9,999 ₹7,999

⚠️ Limited seats — Weekend Batch

  • ✅ 8 weeks of live weekend sessions
  • ✅ 15+ LLD problems solved live
  • ✅ Design patterns deep dive
  • ✅ SOLID principles + OOP mastery
  • ✅ Concurrency for LLD — Threads, Locks, ReadWriteLock, ThreadPool, ExecutorService, Producer-Consumer ✨ New
  • ✅ 1-on-1 mock interview session with peers
  • ✅ Lifetime access to all recordings
  • ✅ Exclusive student community access
  • ✅ Doubt-clearing sessions
  • ✅ Certificate of completion
Enroll — LLD Only ₹7,999

Pay once. Access forever.

★★★★★

"The way you have adopted to make us understand seems to be the best way."

★★★★★

"The deep dives into SOLID principles and Design Patterns using real-world examples like a Parking Lot and Elevator System made complex concepts feel intuitive."

★★★★★

"I'm having a great learning experience. Your structured and well-organized approach to explaining LLD makes complex concepts easy to understand and brings great clarity."

★★★★★

"Complex design principles were explained clearly with practical examples. I now feel much more confident writing clean, scalable, and maintainable code."

★★★★★

"Very good and recommended to everyone who place importance on knowledge over money in the IT industry."

★★★★★

"The structure of the program is well designed, and the sessions are interactive and engaging, which makes it easy to stay focused and involved."

★★★★★

"Pradeep is very approachable and always easy to reach out to for any doubts or clarifications, which creates a comfortable and supportive learning environment."

★★★★★

"The way you have adopted to make us understand seems to be the best way."

★★★★★

"The deep dives into SOLID principles and Design Patterns using real-world examples like a Parking Lot and Elevator System made complex concepts feel intuitive."

★★★★★

"I'm having a great learning experience. Your structured and well-organized approach to explaining LLD makes complex concepts easy to understand and brings great clarity."

★★★★★

"Complex design principles were explained clearly with practical examples. I now feel much more confident writing clean, scalable, and maintainable code."

★★★★★

"Very good and recommended to everyone who place importance on knowledge over money in the IT industry."

★★★★★

"The structure of the program is well designed, and the sessions are interactive and engaging, which makes it easy to stay focused and involved."

★★★★★

"Pradeep is very approachable and always easy to reach out to for any doubts or clarifications, which creates a comfortable and supportive learning environment."

Common Questions

⚙️ LLD Cohort
Who is this course for?

This course is for working professionals (SDE-1, SDE-2 and beyond), final-year students, and freshers who are preparing to crack LLD rounds at product-based companies. You should know basic OOP and be comfortable writing code in any language.

Do I need prior LLD or design pattern knowledge?

No. The course starts from first principles — SOLID, OOP, basic patterns — and builds up to complex problems. Beginners are welcome, but you should know how to write a class and basic OOP.

What programming language is used?

I code live in Java, but LLD itself is language-independent — the design patterns, principles, and frameworks carry over to any OOP language. Code walkthroughs in other languages (Python, C++, Golang, JS) will also be provided.

What if I miss a live session?

All sessions are recorded and uploaded within 24 hours. You get lifetime access to every recording, so missing a session won't affect your learning.

What platform are sessions on?

Live sessions run on Zoom. Recordings and resources are shared via a private community portal.

Are mock interviews included?

Yes — every enrolled student gets a dedicated 1-on-1 mock interview with peers and Pradeep will be monitoring those sessions and feedback will be provided.

Is there a refund policy?

Yes — we offer a full refund if you request it within the first 3 classes. If the content, teaching style, or pace doesn't meet your expectations after attending the initial sessions, just reach out and we'll process your refund — no questions asked. After the 3rd class, refunds are not available.

Is it worth the money?

One salary increment from a better job offer often pays for this course 100x over. But more importantly: the confidence and structured approach you build here compounds across every technical interview you take in your career.

🏗️ HLD Cohort
Who is the HLD course for?

This course is for working professionals targeting SDE-2, SDE-3, and Staff Engineer roles. If you're preparing for system design rounds at companies like Google, Amazon, Flipkart, Swiggy, Razorpay, or any product-based company — this is for you. You should be comfortable writing code and have basic awareness of how web systems work.

Do I need prior system design knowledge?

No prior HLD knowledge is required. The course starts from fundamentals — CAP theorem, estimation, SQL vs NoSQL — and progressively builds to designing real-world systems like YouTube and Payment gateways. But you should know basic backend concepts like APIs and databases.

How is this different from YouTube system design videos?

YouTube videos give you polished solutions. Interviews are not polished — they're ambiguous, follow-up heavy, and require real-time reasoning. This course teaches you the thinking process: how to clarify, estimate, design, and defend decisions under pressure — the way top interviewers actually evaluate candidates.

What systems will we design in this cohort?

URL Shortener, Twitter/Instagram Feed, YouTube/Netflix, WhatsApp Messaging, Uber, Rate Limiter, Key-Value Store, Notification System, Payment Gateway, Distributed Task Scheduler, Search Autocomplete, Web Crawler, Leaderboard, and more — 18+ real HLD problems in total.

What if I miss a live session?

All sessions are recorded and uploaded within 24 hours. You get lifetime access to every recording — missing a class won't set you back.

Are mock interviews included?

Yes — Week 8 is fully dedicated to mock HLD interviews. You'll get 2–3 full mock sessions with detailed feedback on your approach, communication, and trade-off decisions.

What are the batch timings?

HLD Cohort runs on weekends — Saturday & Sunday, 4–6 PM IST. Batch starts 1st August. Sessions are 2 hours each, packed with live system design and Q&A.

Is there a refund policy?

Yes — for the HLD cohort, we offer a full refund if you request it within the first 3 classes. If the content, teaching style, or pace doesn't meet your expectations after attending the initial sessions, just reach out and we'll process your refund — no questions asked. After the 3rd class, refunds are not available.

Can I do both LLD and HLD cohorts?

Absolutely — and we recommend it. LLD and HLD are both tested at most product companies. Doing both gives you complete interview readiness across all design rounds.

Free Masterclass

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Free Sheet and other Important Preparation Links

Roadmaps, cheat sheets, and curated links to help you prepare faster.

📚

Design Pattern Guide — 23 GoF Lessons ✨ New

Free interactive library covering all 23 Gang of Four design patterns with real-world examples.

  • ✅ All 23 GoF patterns explained
  • ✅ Real-world code examples
  • ✅ Interactive quizzes & progress tracking
  • ✅ 100% free, no signup required
Open →
🗺️

LLD Roadmap to crack Senior SDE Interviews

Step-by-step guide covering all topics you need to master for LLD rounds.

Open →
📊

System Design Preparation Sheet by Pradeep

20+ Questions of LLD and 20+ Questions of HLD you need to master and company-wise sheet

Open →
Pradeep Kumar

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Need personalised guidance on LLD, system design, or your interview prep roadmap? Book a direct session and get clarity fast.

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