API Design

What you've got here is a hands-on walkthrough of Spring Boot 4.0, where we'll build a single application from start to finish, using the command line and then packaging it as a JAR at the end. Each chapter adds one real capability, like a REST endpoint, a database, an error handler, a security layer or a test suite. Each chapter gets straight into the code, and you can run, modify and break it to see what happens.There's even a dedicated troubleshooting chapter at the end that deals with the exact errors beginners actually encounter in practice, not just hypothetical ones.

As the author, I (Anshuman Mishra) have written this book with the spirit of mentorship — not just to explain how chatbots work, but to help you build one confidently and ethically. I have taught AI, programming, and computer science for nearly two decades, and I have seen countless students struggle to bridge the gap between theory and implementation.This book closes that gap. It teaches you what to do, why to do it, and how to do it right. It’s not just a manual — it’s a journey from curiosity to mastery.You are not just learning to build a chatbot; you are learning to create intelligence — responsibly, creatively, and with purpose.

A practical backend interview reference covering modern Python and Django development (438 manuscript pages).

Become a Job-Ready API Automation Engineer Using PlaywrightAPI testing is now a must-have skill for modern QA engineers. Companies expect testers to validate backend systems, automate workflows, and integrate tests into CI/CD pipelines.This practical guide teaches you how to master API Testing using Playwright and TypeScript from scratch — even if you are transitioning from manual testing.In this book, you will learn how to:✔ Understand APIs, HTTP, and JSON from a tester’s perspective ✔ Write real API automation tests using Playwright ✔ Handle authentication, dynamic data, and environments ✔ Design a scalable API test automation framework ✔ Integrate tests into CI/CD pipelines ✔ Combine API and UI testing for faster automation ✔ Prepare for API testing and Playwright interviewsBy the end of this book, you will have the knowledge and confidence to build professional API automation frameworks and advance your QA career.Perfect for: QA Engineers, Manual Testers, Automation Testers, SDET Aspirants

A practical backend interview reference covering modern Java and Spring Boot development (1497 manuscript pages).

We'll build an agent step-by-step, starting with a small loop that accepts input and produces structured output. As we go, we'll add tools, validation, model switching, runtime adapters, and packaging techniques that'll let the agent move from a simple script to a reusable application.

A step-by-step Playwright + TypeScript guide for manual testers or who wants to switch to becoming automation engineers.

Understanding “red–green–refactor” is easy; applying it effectively in real-world systems is not. This book bridges that gap by showing you how to practice Test Driven Development in the context of building robust, production-ready .NET Core microservices.

Value Stream Mapping for modern software teams. Learn how to measure lead time, expose bottlenecks, eliminate waste, and build a delivery system where value moves efficiently from idea to production.

Design resilient, production-ready microservices architectures with confidence. Learn how API gateways, service meshes, and observability tools work together to build scalable and secure distributed systems.

Discover the complete world of Scala programming in one comprehensive encyclopedia. SCALAPEDIA takes you from language fundamentals to advanced functional programming, covering Cats, Cats Effect, ZIO, design patterns, architectural patterns, and performance optimization. With over 85 chapters spanning 10 major parts, this is the definitive guide for mastering Scala and building enterprise-grade applications. Whether you're starting your Scala journey or looking to deepen your expertise, SCALAPEDIA is your complete reference for modern functional programming in Scala.

Unlock the future of development by mastering high-performance AI backend APIs with ASP.NET Core. Move beyond simple CRUD to architect scalable, resilient, and secure infrastructures for the AI era. Master real-time streaming, gRPC communication, and advanced observability through practical, hands-on examples. Stop just using AI—start building the robust platforms that power the next generation of intelligent software.

You know how to code, but everyone else seems to "just get it" while you secretly Google and ChatGPT everything. The Software Realm DECODED is the patient mentor conversation you've been searching for, Peter asks the questions you're afraid to ask, and the Ultra Senior Developer explains what bootcamps skip and seniors assume you know. By the final chapter, the imposter syndrome disappears and systems finally make sense.

Tired of god factories and 200-parameter constructors? In one intense week, I turned a payment provider monolith into modular, self-registering NestJS heaven. This book shows you how without losing your mind (mostly).

Build a real-world digital banking platform from scratch using .NET 10, Clean Architecture, DDD, Angular 21 (Nx Monorepo), Docker, PostgreSQL, and GitHub Actions CI/CD. This hands-on, full-stack guide shows you how fintech systems are built in modern software teams—covering microservices, secure APIs, authentication, event-driven architecture, automated testing, containerization, and more. No shortcuts, no toy examples. Just real engineering.