The System Design Masterclass

A no-fluff masterclass that reignites the passion in engineering and helps SDE-2, SDE-3, and above become great at designing and implementing scalable, fault-tolerant, and highly available systems.

Admissions for the August 2024 Cohort are open and only 39 seats left.

If you are a beginner in System Design then check out my System Design for Beginner course.

August 2024 Cohort

8 weeks course 39 seats left

Starts 3rd August, 2024

9:00 am to 12:00 pm IST on Saturdays and Sundays

During the live sessions, you will learn the intuition behind building scalable systems from Arpit. You will also be interacting with the entire cohort and learning from their experiences.

Enroll Now

₹49,999 $649

inclusive of all the taxes


50+ hours of Live Classes on Weekends IST

Two 30-mins 1:1 Mentorship Sessions

Lifetime access to the cohort recordings

Lifetime access to the Network and Community

Open forums and interaction with the cohort

Doubt resolution during and post live sessions

14 days no-questions-asked refund policy

Language of communication will be strictly english

Enroll Now

International folks can also pay in USD or pay in EUR . In case you want to pay in any other currency, just drop me an email at .

Note: there is no discount on the course pricing; I feel discounts are unfair to the folks who paid the full; the price of the course is subject to a yearly hike.

If you have questions or need any clarifications before enrolling, please reach out to me at

Learn at your own pace

50+ hours

16 session recordings

~28 systems covered

You will get access to the recordings of one of my past but best cohorts happened to date; so that you binge watch quickly and prepare yourself for the task at hand.

Buy Now

₹39,999 $599

inclusive of all the taxes


50+ hours of recordings of my best cohort

Two 30-mins 1:1s (within 60 days from purchase)

Lifetime access to the cohort recordings

Lifetime access to the Network and Community

Doubt resolution on Discord

3 days no-questions-asked refund policy

Language of communication will be strictly english

Purchase Recordings

International folks can also pay in USD or pay in EUR. In case you want to pay in any other currency, just drop me an email at

Note: there is no discount on the course pricing; I feel discounts are unfair to the folks who paid the full; the price of the course is subject to a yearly hike.

If you have questions or need any clarifications before enrolling, please reach out to me at

The Program

This is a flagship, intermediate-level cohort-based course aimed at providing an exclusive and crisp learning experience. The program will cover most of the topics under System Design and Software Architecture including but not limited to - Architecting Social Networks, Building Storage Engines and, Designing High Throughput Systems.

The program will have a blend of Live Classes happening on Weekends, 1:1 Mentorship sessions, and self-assignments. The program is designed to be intense and crisp to accelerate learning. In the course, we will

  • have in-depth discussions about trade-offs and tech stack
  • discuss the evolution of architecture as the traffic surges
  • be covering key design decisions for efficient implementation
  • be doing a lot of brainstorming just like how it happens in your org
  • be designing cost-efficient architectures, mimicking the real-world design

Program outline

You can find detailed problem statements in this Github repository.


Week 1

The first week is about learning the macro and micro components of System Design by taking real examples and issues at scale.

Topics and agenda
  • Designing Online/Offline indicator
  • Connection pool and its internals
  • Caching issues at scale and how to solve them
  • Async processing, Delegation, and Kafka Essentials
  • Different Communication Paradigms
Checkout detailed problem statements


Week 2

This week, we learn everything about databases, from SQL to NoSQL to Embedded, learn how to scale them.

Topics and agenda
  • Pessimistic Locking on Relational DBs
  • Designing and Scaling SQL-backed KV Store
  • How to scale relational databases
  • NoSQL Database Trade-offs
  • Designing Slack's Realtime Text Communication
  • Scaling Websockets
Checkout detailed problem statements

Going Distributed

Week 3

The third week will be about understanding Distributed Systems and the challenges that come while building them.

Topics and agenda
  • Designing Load Balancers
  • Scaling Load Balancers
  • Implementing Remote and Distributed Locks
  • Distribtued ID Generators
Checkout detailed problem statements

Building Social Networks

Week 4

This is when we start modeling and building real-world systems, and we start with Social Networks.

Topics and agenda
  • Designing and implementing Photos Upload at scale
  • Implementing Private Photos for Instagram
  • Designing Gravatar and Dynamic OG Images
  • Designing Concurrenct HashTag Counter
  • Designing Message Indicators
Checkout detailed problem statements

Building Storages

Week 5

This week will be about building ephemeral, persistent, reliable and durable storage engines.

Topics and agenda
  • Implementing Single-node Cache like Redis
  • Designing Distributed Caches
  • Designing a Word Dictionary without a DB
  • Designing Log-Structured KV Store
Checkout detailed problem statements

Building High Throughput Systems

Week 6

This week, we level-up and build systems that are heavily concurrent and required to deliver very high throughput.

Topics and agenda
  • Designing S3
  • Designing Multi-tiered Orders for Amazon
  • Designing LSM Trees Ground Up
  • Designing Video Processing Pipeline
  • Designing Live Streaming
Checkout detailed problem statements

IR Systems and Adhoc Designs

Week 7

This week is about understanding Information Retrieval Systems and discuss some interesting adhoc systems.

Topics and agenda
  • Designing Recent Searches
  • Designing Cricbuzz's Text Commentary
  • Search relevance techniques
  • Designing Distributed Task Scheduler
  • Designing and Implementing Flash Sale
Checkout detailed problem statements

Building Algorithmic Systems

Week 8

The final week will be about exploring systems that are driven by a super-clever algorithm.

Topics and agenda
  • Approach behind GitHub's File Sync
  • Understanding and Scaling GeoSpatial Search
  • Designing and Implementing User Affinity Service
Checkout detailed problem statements

Program pre-requisites

The course operates at an intermediate-level and you would get 100x value out of it if

  • You are SDE-2, SDE-3, and above or have at least 2 years of work experience
  • You have a basic understanding of System Design
  • You have completed System Design Pre-requisite Playlist
  • You are interested in learning how real systems are built and implemented
  • Have watched at least a few System Design videos on YouTube from me or other YouTubers
  • You have a basic knowledge of public cloud offerings like S3, SQS, etc.
  • Have couple of months of time over weekends that you can dedicate towards upskilling

I have created this playlist of videos that would give you a good headstart for this course. Feel free to go down the rabbit hole and explore in detail the tech mentioned in the playlist. You can also choose to enroll in my System Design for Beginners course that is meant to cover system design from absolute scratch.

Wall of Love

Some formal/informal messages I received about this course.

Why a cohort based course?




A cohort is a small group of students who work through a curriculum together to achieve the same learning objective.

Small and Focussed Group

Each cohort will have close to ~70 people ensuring you have a richer learning experience.

Thrive Together

Unlike MOOCs where the information flow is unidirectional, the cohort here will thrive on interactions and collaborations.

Discuss and Learn

Learning happens when we discuss, and hence everyone is encouraged to speak, put forth opinions, and discuss.

Why should you join?

The primary objective of this program is to make you comfortable at building systems that are scalable, fault-tolerant, and reliable. But here is what you could reap out of it.

Design systems like a pro

The course will make you comfortable at designing any system, no matter how stringent the requirements are.

Know the unknowns

Learn some of the most interesting concepts, super-clever algorithms, and sophisticated architectures. You are bound to have mind-blown moments.

1:1 Mentorship

When in a dilemma about an architectural decision, engineering challenges, career advice, or general mentorship, get your doubts cleared during your 1:1s with Arpit.

Upskill and level-up

Learn the designing paradigms and upskill yourself to accelerate your career growth and stand out.

Network and Community

Perhaps the most interesting takeaway will be your new network, friends, and a lot of memories.

The world is learning

People from all over the world have mastered System Design through this course.

System Desgin Masterclass Demographic



Who took this course?

Folks belonging to some of the best companies and high thriving startups have taken this course, the list includes the likes of

Teaching style

Here are some of the videos that will give you a peek into my teaching style how I teach and the depth I go into

Hey, I am Arpit

entrepreneur, educator, and tinkerer

Arpit Bhayani

I am a software engineer passionate about System Architecture, Language Internals, Distributed Datastores, and Advanced Algorithms. In 2024, I took the leap of faith and co-founded, where I am operating as the CTO taking care of all things tech.

Before co-founding, I was a Staff Engineer at Google leading the Dataproc India team in providing managed big data ecosystem to GCP customers. I hold 10+ years of experience in building and scaling backend services across domains and companies like Unacademy, Amazon, Practo, and D. E. Shaw.

Post my masters in CSE from IIIT Hyderabad I joined D. E. Shaw for a short stint of 2 months, before moving to Practo and working there as a Platform Engineer, building and owning close to 8 different microservices. Post Practo I worked at Amazon on their primary mission-critical internal E-Commerce Database and built Data Pipelines that cold tiered the stale data.

After quitting Amazon in 2018, I joined Unacademy as their first Technical Architect and there I designed, built, managed, and scaled services like Data Lake, Search, Notification, Logging, Deployment Engine, and many more. I then transitioned into the leadership role and operated as a Director of Engineering and led the Site Reliability and Data Engineering verticals.

I keep diving deep into engineering details and share my learnings by across my socials and videos on YouTube. To put my learning to practice, I keep building things on the side and a few of my good hobby projects include

  • DiceDB - a drop-in replacement of Redis with SQL-based realtime reactivity
  • Revine - a visual programming language for kids

What worked the best?

From the reviews and feedbacks I gathered, here are a few key things that worked for folks who took this course.

mental models and frameworks

structured and well organised

quality and non-repetitive content

minute implementation-details

open ended discussion

much more than blogs we find

What people say about this course?

Some testimonials from the people who recently took this course.

Vasavi October 2023

This year I completed the beginner course and rewatched the advanced lectures. I had stumbled upon your course by chance. The "No fluff" tag caught my attention, at a time when I was hungry for asli engineering discussions. I signed up and the course exceeded my expectations.

Thank you so much for putting such high quality content out there, for making it accurate and simple to grasp! Thank you for being encouraging, and for making the course discussion-based which made us think and not just consume! I have learnt a lot from your courses and videos - so much so that I have been getting appreciative comments on my knowledge, in system design discussions with peers. The content and your palpable passion in sharing it with the world reinstilled in me the inspiration, which had made me pursue computer science as a career in the first place - it reminded me of the joy in learning, understanding, and building systems with real world impact.

Thank you for all your efforts in teaching and inspiring! Hoping to keep in touch and continue learning from you. 🙂

Koteshwar Rao October 2023

I have done a couple of system design courses on Udemy and watched a bunch on YouTube as well, but none of them are even close to this.

What differentiates this course from the rest,

  1. This course focuses on how to develop the intuition instead of question-answer type
  2. It also highlights on how to think about businesses and product which is a very essential quality for Senior Engineers
  3. The discussion doesn't start with different boxes/services already drawn and then explaining what each box does. We start with our basic intuition of how our system looks on Day 0 and then we understand what would be a problem with this design when we scale and then try to address each of them.
  4. Discussions aren't about how to design Instagram, Cricbuzz, or E-Commerce but rather focus on a specific problem and then discuss deep on that. Ex: Image upload service, Flash sale, commentary for live match etc
  5. We also realize how easy it is to prototype what we have learnt

One can understand how much passion and depth Arpit goes in his YouTube videos as well

Karan Patel December 2023

Previously, I had a fixed mindset regarding how I was going to tackle any system design question. Start with the functional and non-functional requirements, do some back-of-the-hand calculations to depict the scale of the system, start drawing boxes for application servers, load balancers, queues, and databases. While this approach works most of the time for cracking a few interview rounds, Arpit’s course forces you to ditch this conventional thought process and makes you dive deeper into systems and their actual implementations.

This course definitely is a goldmine not only in terms of the content but most importantly, how it sparks curiosity within you to think of system designs beyond just interviews.

  1. This course will teach you how to build a solution for any system from the ground up with the right intuition and thought process.
  2. Arpit has very smartly covered almost all the fundamental systems out there so that any new system can be easily built on top of it. “Just mix and match”.
  3. One particular thing I liked about the course was the prototypes he created to explain the concepts. I mean it’s one thing to know the concept and completely different to see it live in action. Kudos for putting in the efforts to make the course more engaging.
  4. If you were ever curious about how systems like the Flash sale, Cricbuzz commentary, Cricket live feed (My favourite discussion) work, look no further because these discussions will literally make you admire how awesome engineering truly is.

A course is only as good as the instructor and Surprise!! Surprise!! Arpit is too good at the teaching part as well. You can sense the enthusiasm and curiosity in his way of teaching as well. He would patiently answer all the questions asked even though the class duration was well past 4 hours. He is open to new ideas and solutions and doesn’t make you feel any lesser even for a bit.

Any senior engineer looking to make an impact at their workplace or waiting for that engineering spark to be reignited again, this course is a must! Thank you for proving that true engineering is well beyond interviews. "SUPERB!"

Saurabh Jagtap December 2023

This was the first one of the kind Cohort that I enrolled in. The way Arpit teaches is fabulous. I would say it is not even a teaching but feels more like an actual discussion that would go into an engineer's day-to-day life. He carries total empathy for a learner. The depth and details he carries in everything he says are fantastic. All the doubts and discussions will have an answer from Arpit. Folks tuning in to every cohort have the brightest minds, and the way discussion happens in cohort with Arpit along with such minds, is just a treat to experience.

What I loved the most was brainstorming sessions. It's never a monologue from Arpit. Sometimes we start to build and would never ever feel that we might be building something so big in just one half of the cohort's session, that too with proper brainstorming from people. The way he helps people to start dissecting the problem; feels like he is just showing the light, others are building the system unknowingly, and feels amazing after we see the output. The way he sparks the decision-making processes helps to build the right intuition, goes deep into the details, and picks every bit and piece of the system is just fantastic. It makes the session the most engaging.

You will get the hands-on experience of picking the simplicity of the system, importance of knowing the basics and other concepts in engineering, and dealing with the tradeoffs of every technology, and mostly the intuition-building

If I have to point out the learnings, they are something like this; and I believe most of the other people in the cohort would agree with me on this;

  • Simple systems scale.
  • Always prototype and implement.
  • System design is like Lego blocks; you just have to place the right component in the right place, and it's not something that will be correct in the first iteration.
  • Know the basics and concepts, then just pick it up and place it; you'll build crazy stuff.
  • And probably the best: you get some, you lose some. Not a single system exists that can do everything.

This is not an ordinary system design cohort, you will ACTUALLY build systems that scale; for millions of users. And no joy is more than seeing it work.

Ajay Mahadevan December 2023

Arpit is undoubtedly one of the best engineers I've seen in my life. Started following his content on youtube quite a few months back and really liked the way he dives deep on interesting core topics. That brought me to his System Design Masterclass course. The initial Indian mindset made me contemplate on the price of the course but boy oh boy! I'm not regretting even a single bit for what the course was priced at! :)

This is a goldmine of content and as I say, if not all, most who have taken the course would agree that Arpit has truly sparked the engineering curiosity. He offers incredible value in what he teaches. Not exaggerating but I've had "wow" moments in every single class.

Arpit's credentials in engineering is as good as it comes. He is a seasoned pro and it shows in every session, the love and passion for engineering and his craft. With just 3 years of experience, when I entered the course, I was blown away in the first week itself. A serious eye opener for me into building systems for scale.

Arpit has curated the syllabus very beautifully and paces it really well. I'd really suggest to take the interactive live cohort rather than buying the compiled course cause live sessions are just something else! Its truly interactive. Almost every system is built by brainstorming with the folks in the cohort and Arpit helps converge to the right intuition and idea going step by step from scratch, questioning every decision made from the problem statement, design and implementation perspectives in depth. In short by the end of each system design you have the entire design laid out to you in which you understand the purpose of every component used, what it solves for and why this and not anything else, cause you were part of a lengthy discussion that arrived to it. Truly awesome stuff!

Its not only theory or surface level, he emphasizes so much on building prototypes for the concepts and systems we build in the cohort and he does a code walkthrough and explains his prototypes to show that its not hard to build prototypes. This also solidifies your understanding in the concept better as you often uncover interesting challenges when implementing. You also get access to a community and many great folks in the cohort. I felt like the dumbest person in the cohort and absolutely loved that cause there was so much to learn every time.

His patience and love for the work he does is so admirable and inspiring. Once the session is done he is open to taking and answering questions for however long it takes. Does not shy away or asks to stop asking questions after each session. I've seen this QnA sessions go for so long and he doesn't even flinch or calls quits. Massive respect for this Arpit!

Overall one of the best investments I've made in myself for my career.

I thank Arpit for this brilliant cohort and would 100% recommend it to anyone who has some experience in the field and looking to scale up to be senior engineer wanting to build systems the right way.

Don't miss out folks!

Komal Kungwani August 2023

"The Best Real World System Design" course in market right now.

Arpit touches upon some really interesting areas in system design. He doesn't just draw the boxes, he really focuses on the implementation details of the system. For example,

  • what query you would use to build this system and how would you optimise it step by step as per your requirement.
  • How you deal with tradeoffs.
  • What is the order in which the execution should happen. What race conditions we might land up into.
  • How to simplify your constraints like we do in real world No Magic.

He explained and "actually discussed" so many different designs in a period of 2 months. Hats off man.

He actually focuses a lot on building your intuition. I would Highly recommend this course to anyone who is looking for building the intuition and not just the theory.

Isha December 2023

Arpit is a great guide, his passion for learning and making others learn as well is remarkable. I had been following his YouTube videos for long and the way he approached and explained problems motivated me to take this course.

For sure, it's been one of the best decisions. Few principles that he emphasizes on have been key take aways for me [other than building the intuition around taking technical design decisions of course].

1.Simple systems scale best -never over complicate 2. Database is the most brittle component of your system, design it cautiously 3. While designing you always gain some you lose some, you need to decide the best tradeoff for your system. 4. There are always multiple ways of doing things, whenever you think of reactive approach think of proactive as well and vice versa, some scenarios might be best fit in completely contrasting scenarios of your previous design decision. 5. Be self-critic of your design and question every design decision taken to converge to best design.

Somehow, we might be knowing these but how beautifully applying them affected our decisions at every step just ingrained it further.

Before taking this course i went through some comments and feedback for this course out of which 90% were positive however there was one of the comments which stated him as "self-proclaimed industry expert" -to this one i would say he definitely is an expert in what he is teaching and that can be acclaimed by anyone taking this course.

So, I would highly recommend this cohort for anyone who wants to understand how real-world systems work and actively participate in the discussions. Other than live cohort the recorded learning course will be equally helpful for people who want to absorb the concepts at their own pace.

Antra Purohit June 2023

I am absolutely thrilled to share my experience with Arpit System Design Cohort. Participating in this program has been a transformative journey that has enriched my understanding of system design concepts and elevated my skills as a software engineer.

From the very beginning, Arpit's passion for system design and his expertise in the field were evident. His well-structured curriculum and engaging teaching style made complex topics seem approachable and understandable. Arpit's ability to break down intricate design principles into digestible chunks ensured that I never felt overwhelmed.

One of the standout features of this cohort was the emphasis on hands-on learning. Through numerous real-world case studies and practical exercises, I had the opportunity to apply the theoretical knowledge to actual system design scenarios. This experiential learning aspect truly solidified my understanding of the concepts and boosted my confidence in tackling real-world design challenges.

I cannot recommend this Cohort enough for anyone looking to enhance their system design skills. Whether you are a seasoned software engineer or just starting your journey, this program will undoubtedly take your design abilities to new heights. Thank you, Arpit, for your dedication and expertise in guiding us through this enriching experience!

Arun Vydianathan February 2024

All aspiring programmers who crave to build scalable, lasting distributed systems should attend this program. Arpit always nudges us to be hands-on writing code during the course. He helped in inculcating the process of breaking the problem to minutest bit which make us focus on the crux ignoring the surrounding fluff and go and solve for it. The breadth of coverage is quite comprehensive from CDNs, to storage systems, to caching, to databases, to networking the entire gamut of technology spectrum is given a time slice in the course.

Personally for me this course changed the outlook & perspective of how I view systems and problems. I used to be overwhelmed while dealing with complex microservices. Now I feel this course hast helped me to build a muscle of intuition on how systems are built. This hunch/intuition is driving me now to simplifying solutions, instead of adding boxes to the system, I am striving to build systems which are simple and intuitive.

Kudos Arpit, you are a rockstar & inspirational.

Pavan Krishna Rampalli December 2023

The best course for system design to elevate your engineering career.

I have previously tried many resources for getting better at designing systems at scale. But all of them were more focussed on interview, ending up as drawing some black boxes without understanding them.

This course helps building the intuition on what are the possibilities at every stage in designing the system and how to make a tradeoff between them. Definitely, I recommend people to take up the course.

Thank you Arpit, you are simply amazing. Will definitely be among the best teachers in my life that shaped my learning.

  1. The design options at every stage and taking trade-offs between them boosted my system design abilities.
  2. The course started from basics to designing complicated systems and connecting the topics from previous weeks. This helped elevating my thought process based on the lego blocks.

Ujjwal Vaddepati February 2024

Before attending this course, my interest towards learnings B Trees or Graphs is less interesting and boring. Once Arpit has explained about DB internals in one of our cohort design discussion's and how these data structures are being used and why in a certain way, my curiosity has increased a lot.

Now I am interested towards learnings every internals of systems like e.g Docker, Kubernetes, Kafka, Bit-cask, Redis and how the data is being stored & what trade offs have been taken and especially what are they compromising on in order to achieve consistency, reliability or durability.

This cohort from Arpit is worth every penny spent and is just a beginning for me/everyone in order to become better engineer. I would recommend every engineer to take part of this course and be a 10x Engineer. Thank you Arpit a lot, kudos to you for the hard work on creating of the course content and patiently clearing every engineer doubts.

Aniket Mahangare August 2023

Arpit's system design course stands out as one of the best available options. He places a strong emphasis on constructing systems while taking into account intricate low-level implementation details. Throughout the span of 8 weeks, we engaged in discussions about numerous systems and participated in a multitude of brainstorming and question-answer sessions within a closely-knit cohort. I will always cherish the following key takeaways from the course:

  1. The inevitability of trade-offs.
  2. The prioritization sequence: Business, followed by product, and finally engineering.
  3. The essence of system design lies not in merely sketching boxes but in comprehending the intricacies of low-level implementation, all while considering the cost-to-performance ratio.

The last time I maintained such unwavering focus during four-hour-long sessions was back in my days of preparing for the JEE. I wholeheartedly recommend this course to anyone seeking to gain expertise in designing real-world systems.

Tanvin Kalra October 2023

I recently completed the System Design Masterclass, and it surpassed all my expectations. Arpit's approach transcends traditional box-drawing exercises, delving deep into the intricate implementation details that distinguish this course.

A standout feature is Arpit's emphasis on practicality. Rather than presenting abstract concepts, he guides you through choosing the right queries for system development and optimising them step-by-step based on specific requirements. The course fearlessly addresses tradeoffs, offering valuable insights for informed decision-making.

In just two months, Arpit covered an impressive array of diverse designs, fostering a profound understanding of system design principles. His dedication to facilitating genuine discussions, not just surface-level explanations, is truly commendable.

Harsha Chinni June 2023

I had the pleasure of enrolling in Arpit Bhayani's System Design Masterclass course, and it was truly an awe-inspiring experience! Arpit's teaching style is beyond compare; he effortlessly breaks down complex topics into small, easily understandable units, making the learning process enjoyable and effective. The systems discussed in the course were pragmatic and immediately applicable to real-world projects. I found myself confidently applying the knowledge gained in my work projects.

Every penny invested in this course was worth it and more. What sets Arpit apart is his exceptional dedication to his students. He goes above and beyond by spending a significant amount of additional time post-session to answer every single question with great detail and patience. On several occasions, the Q&A sessions extended for an impressive 2.5 hours beyond the regular 2-hour session, ensuring that all questions were answered.

I cannot recommend this course highly enough to anyone looking to enhance their system design skills. It's an invaluable resource led by an outstanding instructor, and I'm grateful for the knowledge and support I received throughout the course.

A big thank you, Arpit, for this fantastic learning journey!

Ruchit Bhardwaj August 2023

Two words - Absolutely fantastic! This systems design course has been nothing short of a revelation. It delves deep into intricate system design engineering concepts, offering a comprehensive understanding that encourages critical thinking while discouraging broad generalizations. The course does so, while discussing the business implications for each decision that is taken, which you don't get to learn anywhere else.

I was an avid viewer of Arpit's YouTube channel from long before I took this course and his website has a ton of resources if someone actually takes the time to go through those topics. The beauty of the course is that once the system is designed, Arpit makes sure to specify how can a similar system be implemented locally (where ever feasible). I have no doubt that I'll continue to refer back to the meticulously prepared class notes and insightful recordings in the future. I have nothing but admiration for this course and I am definitely excited to take his Redis internals course sometime in the future!

Enrolling in this course has been a game-changer, and I can't recommend it enough. Thank you, Arpit!

Shekhar December 2023

Arpit has truly poured his soul into this course.

Beyond the technical knowledge, I admire him for his passion for technology. Not only does he possess excellent technical acumen, but he also excels in articulating and demystifying complex technical concepts.

Decoding intricate systems and making them easy to comprehend is his forte. I also appreciated the structure and delivery of the content; the three-hour-long sessions never felt monotonous or repetitive.

I would highly recommend this course to anyone eager to learn how complex systems work.

I have personally learned a lot of concepts and gained a great deal of confidence in approaching challenging technical decisions. The terms and concepts that were once unfamiliar to me before the course are now very clear.

My intuition and curiosity have been ignited, and a solid foundation has been laid to understand and build complex systems without unnecessary complications.

Naveen Kumar December 2023

The best tech investment that I have ever done by enrolling in this course. Excellent learning through the live interactive classes and cohort mates. 1000% recommended for all software engineers!

I was super impressed with the concurrency part of the lectures having pessimistic locking with select queries extending it to various booking systems -> task scheduler -> MessageBroker, scaling web sockets for millions, design of loader balancer and S3 storage.

I am much more confident now with the strong intuition and right way to design any system. I am able to recognise the patterns in the system design :)

Abhishek Gorisaria February 2024

Course has been nothing short of transformative for my understanding of complex systems design architecture. Arpit provided his valuable real-life experience that he encountered over his last decade of experience, that truly enriched my learning experience a lot.

Through practical experience of Arpit and peers I gained an understanding of designing scalable, reliable, available and most importantly business aligned architectures.

I highly recommend this course to anyone looking to enhance their skillset in designing reliable, efficient and business aligned architecture/products.

Whether you're an experience or beginner, the engaging learning environment will undoubtedly propel your career to new heights.

Nimit Kanani April 2023

Your videos on Youtube sparkled my interest in backend engineering, and I've learnt a lot through them and they've made me a better engineer. I feel you don't get enough credit for your fabulous channel, . I always felt it difficult to understand content in this domain, but when you used to explain, everything felt so easy and intuitive. That is the reason I signed up for this course when couple of people recommended me to do so.

In the first couple of sessions itself, I was amazed by the amount of stuff I learnt, and it siply continued in all the sessions. The course recordings are like a lifelong treasure which I will keep going back to for lifetime. The amount of value you deliver by this course is beyond words.

Two of the most important things in engineering is to 1) ask the right questions and 2) How to approach a problem and think about it. You showed us how to do these two very well.

The interactive session format is very helpful. This way we think about the solution actively, and I loved how the inputs of different people in the discussion ultimately leads to the solution. And Some very brilliant engineers in the cohort out there. Your dedication to run this course and channel is superb, it shows your deep passion about this field.

The pre-reads section as well as suggestions to read/explore/implement after the sessions helps us get even better as an engineer.

All in all, 'Learning full, money and time vasool'. Thanks a lot for this.

Sankar Banerjee August 2023

This course is different where depth and breadth regard. I am a seasoned Engineer who has been working for many years. I have never found such a course before. It does the following.

  1. It shifts your focus from "interview mug up" to pure Engineering practice. Henceforth you will never be overwhelmed/ intimidated by the number of interview questions asked in different companies. Rather you will have amazing fundamental knowledge out of this course, which will help you to come up with the answer of an unknown interview question during the interview. Also you can apply this knowledge in work.
  2. It helps to mitigate any GAP of knowledge of Engineering that a senior Engineer should have.
  3. It points out what we should do regularly such as reading Engineering papers, trying to think about the trade offs of different systems, thinking about the use cases of different solutions and thinking why they at all evolved etc.
  4. It will help you to think smart such as "not reinventing the wheel" (which kills precious time) and just improving an already evolved system to make it better.

In short you will get pointers to different knowledge areas which, may be you never knew. You can think of it as another Engineering course with the focus on the application in real world use cases of system design.

I wish Arpit all the best.

Paarth Dassani April 2023

These couple of months was truly an exceptional learning journey. What stood out for me was the immersive approach to implementation. Arpit took us through the intricate details of each system, allowing us to tackle lower-level challenges and gain a much deeper understanding. This really gave me the confidence to tackle real world problems.

Another highlight were the brainstorming sessions where we freely discussed our ideas and approaches. This not only enriched the learning experience but also exposed us to many different approaches to solve the problem at hand. A great part of the learning was through the questions and discussions that others brought forward.

Each session was filled with valuable insights and practical knowledge. The course struck the perfect balance between theoretical concepts and practical considerations, equipping us with the know-how of designing robust systems. We delved into aspects like extensibility of our systems and cost optimization as well, which was really insightful.

Overall, it was a great learning experience, and I had the best time! This course is gold and truly does live up to the #AsliEngineering message. Highly recommended

Sanjay Vasudeva February 2024

I can't imagine a better system design resource.

Arpit starts with the simplest possible solution and strongly emphasises introducing complexities only when necessary.

He encourages you to think of the technical, product and business motivations behind a system. He doesn't really prescribe solutions to problems but helps you build intuitions behind usage of technologies. 11/10, would highly recommend.

Things that worked out the best for me were:

  1. Religiously starting with the simplest possible solution
  2. Strong emphasis on introducing complexities only when necessary
  3. Encouragement of product and business thinking
  4. Technical depth: Arpit always answers the how and why behind every question

Frequently asked questions

You can always drop me an email at for other questions.

What will be the language of communication and teaching?

I will be teaching the entire course in english and all the brainstorming with participants will be conducted in english.

Is this course right for me?

This course is for any engineer who wants to learn System Design. The program is most suited to someone who has some industry experience, at least 6 months.

Will you be giving teaching for the entire duration?

Yes. I will be teaching the entire course online and live over Zoom and will be providing feedback and 1:1 mentorship.

Will there be a class every day?

The Live Classes will happen on Saturdays and Sundays as per the time mentioned on the webite with a possible extension of 30/45 mins.

Can I get this course reimbursed from my company?

Talk to your manager and check if they can sponsor this course. The invoice that will be issued is a legally valid and sound invoice that can be used for any kind of reimbursement.

Will there be reserved slots for 1:1 mentorship?

1:1 mentorship calls will happen on-demand, you can block the slot from the learning portal itself.

What is the validity of 1:1s?

For system design masterclass live cohort, you can schedule 1:1 within 1 month of course completion and if you have purchased the recordings then 60 days from the date of purchase.

Will there be assignments and hands-on projects?

No. I would recommend you implement the core of every single system we discuss ensuring you apply what you learn. I highly encourage you to implement seek help during 1:1 sessions.

Will the course cover LLD?

The course will cover some aspects of Database Design and its internals, but it will not cover writing and designing classes, and low-level design patterns. The course is typically aimed at covering the massive spectrum of System Design and Software Architecture.

Are assignments and projects mandatory?

No. But it is advisable that you complete them to get a better understanding of the system, algorithm, and business logic.

Will we also implement and see the systems in action?

Due to time constraints, it is not possible to implement every system; it is recommended that you self-implement the system and understand the low-level details. The course will definitely cover systems from every aspect.

Will there be a recording available for future reference?

Every single Live Class will be recorded, and you will be given lifetime access to it.

Is there a refund policy?

14 days no-questions-asked refund window from the course commencement date (11:59:59 pm on the 13th day from the course commencement date) on cohort based course. 3 days no-questions-asked refund window from the date of course purchase for 'Learn at your own place' offering.

Can I share my learnings, resources on social media?

No. I hold complete right to cut-off the access to any course material if I find you sharing course material, learning, videos, and notes on social platforms or the internet.

Will I get access to other cohorts?

No. You will get lifetime access to the cohort you are part of and its recordings, or the recordings that you purchased.

Where are the classes conducted?

All Live Classes will be online, over Zoom, and all you need is an internet connection to attend the live sessions.

Will you be the only one teaching this course?

The entire course including Live Classes will be conducted by me, Arpit Bhayani, no external TAs, mentors, etc. You will get to learn everything from the horse's mouth.

What are the programming pre-requisites?

It would help if you had to have work experience of 6 months, plus a basic understanding of one of the cloud providers like AWS, GCP, plus some basic understanding of high-level system design by watching already available YouTube videos. You can also find a few videos on this ppage that I would recommend you through.

How is this course different from free videos on YouTube?

This cohort-based course aims to be live, intense, and interactive. Traditional MOOCs (existing videos on the internet) cannot offer these benefits as they are unidirectional and optimizes for one-to-many. With this course being taught live, you can get instant resolution to your doubts. The discussion, collaboration, and networking will have a major impact on your overall learning as there will be cross-pollination of information.

If I have already watched System Design videos on YouTube, is this course still helpful?

Yes. The kind of depth which is touched in this System Design is unmatched. Even if you have watched all the System Design videos out there, you will still have moments that will blow your mind.

Will I be getting an invoice of Payment?

Yes. An invoice will be issued to you with all the legal and necessary details. This means your employer can choose to process this invoice and provide reimbursement.

Will you issue a course completion certificate?

I do not generate the certificate for every candidate, but if you need it, just drop me a message, and I will issue one right away.

Can I use my Credit Card or avail EMI to make the payment?

Yes, we support Credit Card, Debit Card, UPI, and Credit Card based EMIs having a duration of 3 months, 6 months, 12 months, and 24 months as offered by Razorpay.

Can I share the account with multiple people?

I track the browsers and devices from which the course is being accessed and if I fnd anything suspicious, I hold the complete right to revoke the access of the course and not offer any refund.

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