Diagram-first
Pictures that carry the explanation
One consistent visual language across every book, so the diagrams teach instead of decorate. If a concept can be drawn, it is.
The HLD Blueprint is out now · more on the way
Crack the tech interview,
one blueprint at a time.
Visual, interview-ready books for every round: system design, low-level design, data structures & algorithms, and AI engineering. Clear diagrams, a method for each round, and nothing you don't need.
- 4books planned
- 1available now
- 2PDF editions each
The library
One book for every round.
Each Blueprint covers one interview round in depth, in the same visual style.
Available · ₹199
System Design · System design round
The HLD Blueprint
Building blocks, the 5S interview method and 25 complete case studies, from URL shorteners to stock exchanges.
View the book
Interview Blueprints · System Design
The LLD
Blueprint Low-level design and machine coding, done cleanly. In the works
Blueprint Low-level design and machine coding, done cleanly. In the works
Coming soon
System Design · Machine coding & OOD round
The LLD Blueprint
OOP, SOLID and the patterns that matter, then classic machine-coding problems solved step by step with clean, extensible code.
Join the waitlist
Interview Blueprints · Coding Rounds
The DSA
Blueprint Patterns, not 500 random problems. In the works
Blueprint Patterns, not 500 random problems. In the works
Coming soon
Coding Rounds · Coding & online-assessment rounds
The DSA Blueprint
Learn the 25-odd patterns behind most coding questions, with templates, visual walkthroughs and hand-picked practice.
Join the waitlist
Interview Blueprints · AI Engineering
The AI Engineering
Blueprint Build and ship LLM-powered products. In the works
Blueprint Build and ship LLM-powered products. In the works
Coming soon
AI Engineering · AI / LLM engineering roles
The AI Engineering Blueprint
Prompts, RAG, agents, evals and production concerns, explained with the same diagram-first approach.
Join the waitlist
Learning path
Where each book fits in your prep.
Most interview loops test these rounds in this order. Start wherever your next interview needs you.
- 1 Coding & online-assessment rounds The DSA Blueprint Patterns, not 500 random problems. Coming soon
- 2 Machine coding & OOD round The LLD Blueprint Low-level design and machine coding, done cleanly. Coming soon
- 3 System design round The HLD Blueprint High-level system design, explained visually. Available
- 4 AI / LLM engineering roles The AI Engineering Blueprint Build and ship LLM-powered products. Coming soon
Why Blueprints
What every book gets right.
The same promise, whichever round you are preparing for.
Method
A playbook for each round
A step-by-step method you can run in the room, used in every worked example.
Practice
"Check yourself" questions
Short recall questions with answers after each chapter. Retrieval beats re-reading.
Interview-ready
Words you can actually say
"I'll pick X because of Y. The cost is Z, which is fine here because W."
Read anywhere
Two editions in every purchase
An A4 PDF for laptop, tablet and print, plus a phone edition with large text and no pinch-zooming.
FAQ
Questions, answered.
Which book should I start with?
Start with the round you will face first. For most product-company loops that is DSA for the coding rounds, then LLD and HLD for the design rounds. The HLD Blueprint is available now; the others are being written.
When will the LLD, DSA and AI Engineering books be out?
They are being written now, to the same standard as the HLD book. Join a book's waitlist and you will get one email when it launches, with launch pricing. We don't promise dates until a book is finished and reviewed.
How do I pay, and when do I get the PDF?
Pay with any UPI app by scanning a QR code, then enter the UPI reference number (UTR). We verify the payment and your download unlocks on your order page, usually within a few hours.
Are these physical books?
No, they are digital PDFs. Each purchase includes an A4 edition for laptops, tablets and printing, and a phone edition with large text.
Do I get updates?
Yes. Corrections and additions to the edition you bought are free. Use your order page link to download the latest version.
Is it refundable?
Because these are digital products, purchases are non-refundable once the download is unlocked. If you paid twice, paid but could not get access, or something went wrong, contact us and we will make it right.
I lost my download link.
Use "Find my order" at the bottom of the page and enter your email and UTR to recover it.