This book introduces you to web development with Rust and Leptos. To begin with, you install a solid Rust toolchain and set up Leptos in VS Code, and then you see your first "Hello World" interface rendered via WebAssembly right away. So, first you'll design a microservice-inspired book-selling sample app , called LibroCommerce, into inventory, orders, and user accounts. Then, you'll connect each piece with Axum handlers, SQLx queries, and shared Serde models . By the time you get to Chapter 3, you'll have built a nonblocking, Tokio-driven server that handles dynamic routes, powers Leptos SSR pages, and secures endpoints with JWT and OAuth2 . Then, you add real-time features: WebSockets send stock updates and order-status events to reactive Leptos signals, keeping the UI and backend in sync . As you go, you'll be writing end-to-end Playwright tests and setting up GitHub Actions so that every commit runs Rust tests, Playwright scenarios, Docker builds, and Kubernetes rollouts automatically . You'll learn how to connect to PostgreSQL with an async pool, model Books, Users, and Orders with Serde-annotated Rust structs, and implement CRUD, password hashing with Argon2, encrypted backups, and session stores in Redis . Performance tuning shows you how to optimize Tokio threads, tune SQLx pools, stream large result sets, debounce client inputs, and apply backpressure . At last, you put each microservice and frontend into Docker containers, deploy them with Kubernetes, and then use serverless . It's packed with over 100 bite-sized examples and ready-to-run solutions , and it'll walk you through building and operating a production-style web application in Rust, step-by-step . You won't become a Rust language expert, but you'll finish ready to design, code, test, and deploy modern web apps . Key Learnings Start using Rust and Leptos with VS Code to develop web applications using WebAssembly. - Architect microservices with inventory, orders, and user modules for modular, scalable applications. - Make servers that respond to user activity and are not blocked by other users. Use Tokio and Axum with dynamic routing and concurrency. - Employ business logic with SQLX, transactions, and external API integration for real-world workflows. - Protect your devices with JWT, OAuth2, Argon2 password hashing, HttpOnly cookies, and TLS encryption. - Handle database state asynchronously, define Serde data models, and perform efficient CRUD operations. - Utilize WebSockets, Leptos signals, and broadcast channels to enable real-time updates. - Perform end-to-end testing with Playwright, integration tests, and automated CI pipelines for reliability. - Put microservices and the frontend into containers using Docker, and use Kubernetes to orchestrate them so they can be deployed without any downtime. Table of Content Setting up Rust & Leptos Environment - Designing Modern Architecture - Building Application Server - Database Integration and State Management - Modern Interactions with REST, GraphQL, and OAuth - Front-end Development with Leptos and WebAssembly - Real-time Interactions using Websocket - Modern Security, Performance, and Cloud Strategies - Cloud-native Releases and Continuous Delivery