Leanpub Header

Skip to main content
Go to Leanpub.com

System Design for the LLM Era

Patterns and Principles for Production-Grade AI Architecture

Sampriti Mitra

STOP building fragile AI wrappers. START designing resilient AI systems.

Lots of companies are trying to make their small AI experiments into big products, but they don't have a good plan. Engineers need a practical guide to build these new AI systems the right way - so they can handle scale, be reliable, and won't cost too much.

This book is that guide. It explains how to design systems that use AI models.

This book breaks down the architecture of real AI applications, like an AI-powered code editor or a smart learning app. It gives you a deep, practical look at the real-world challenges and solutions for building these systems.

It discusses system design concepts for systems that use LLMs.

Minimum price

$13.99

$13.99

You pay

$13.99

Author earns

$11.19
$

...Or Buy With Credits!

You can get credits with a paid monthly or annual Reader Membership, or you can buy them here.
PDF
EPUB
295
Pages
About

About

About the Book

Most AI engineering today is just messy glue code around an API call. That works for a prototype, but it breaks in production.

You don't need another prompt engineering guide. You need a System Design guide tailored for the non-deterministic nature of Large Language Models.


What You Will Learn

This book is a practical, no-fluff deep dive into the architecture of real applications using AI (like Cursor, Duolingo, Doordash). We cover:

Chapter 1: LLM System Design: Why Integration Requires New Patterns

  • Beyond the hype: Understanding Tokens, Embeddings, and the RAG lifecycle.
  • Why Naive RAG fails in production and how to fix it with GraphRAG.
  • Agentic AI: Understanding the shift from simple prompts to autonomous agents.
  • Operationalizing: Performance benchmarking, testing strategies, and handling failures.

Chapter 2: Core Architectural Patterns

  • Resilience: Circuit breakers and fallbacks for when OpenAI goes down.
  • Latency: Caching strategies to make LLM apps feel instant.
  • Cost: Token optimization techniques to slash your API bill by 40%.
  • Security: Injection attacks, data privacy, and Grounding strategies.

Chapter 3: Case Study: Designing an AI-Native IDE (like Cursor/Copilot)

  • Handling the Context Window problem with smart code indexing.
  • Privacy patterns for handling proprietary user code.
  • Deep dive: Latency vs. Accuracy trade-offs in code completion.

Chapter 4: Case Study: Adaptive Learning Platform

  • Architecting an offline content pipeline vs. an online serving path.
  • Asynchronous processing patterns for generating personalized courseware.
  • Database selection: When to use Vector DBs vs. Relational vs. Graph.

Chapter 5: Case Study: AI-Powered Search for E-Commerce

  • Moving beyond keyword search: Hybrid Search architecture.
  • The Product Discovery flow: Ranking and re-ranking with LLMs.
  • Caching strategies for high-traffic retail events.

Chapter 6: Case Study: AI Customer Support Agent

  • The Golden Dataset: How to build an evaluation suite that actually works.
  • LLM-as-a-Judge: Automating your quality assurance.
  • Ingestion pipelines: Keeping your knowledge base fresh in real-time.

Gumroad link

Also available on Amazon

Share this book

Categories

Computers and ProgrammingSoftware ArchitectureDatabasesSoftware EngineeringArtificial IntelligenceGPT

Feedback

Email the Author

Author

About the Author

Sampriti Mitra

Sampriti Mitra is an engineering tech lead at Sumologic and an alumna of IIT BHU, with over six years of experience designing and building scalable distributed systems. She understands the engineering realities of integrating large language models (LLMs) into production-grade systems.

Her professional background includes roles at industry-leading companies like Sumologic and Razorpay. She also runs a newsletter, Architecturally Speaking on Substack, which is dedicated to breaking down system design principles.

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earned over $14 million writing, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub