Overview

This book provides a structured, in-depth guide to designing, building, optimizing, and deploying modern enterprise-grade applications using a contemporary Java-based application framework and cloud-native architecture. It is written for developers, software engineers, and system architects who need clear, practical, and production-focused knowledge rather than surface-level tutorials. Readers will learn how to design clean, maintainable systems using proven architectural principles and design patterns. The book carefully explains how to structure scalable applications, create stable service layers, and manage data with efficiency and consistency. It moves beyond simple examples by introducing real-world techniques for building secure APIs, implementing robust authentication and authorization models, integrating payment workflows, and developing complete backend systems such as e-commerce platforms and real-time messaging applications. Special attention is given to performance, reliability, and operational excellence. You will gain a solid understanding of profiling, memory management, garbage collection tuning, multithreading behavior, and application diagnostics using professional tools and best practices. Observability is also covered in detail, including structured logging, metrics collection, tracing strategies, and visual monitoring approaches that allow precise analysis of live systems. The book presents modern approaches to deployment, including containerization, automation pipelines, and cloud-based release strategies. You will see how to prepare applications for distributed environments, automate testing and deployment processes, and configure production-grade environments across major cloud platforms. Advanced scenarios such as serverless execution models and native compilation for ultra-fast startup and reduced memory use are presented clearly and methodically. In addition to infrastructure and architecture, this book emphasizes code quality. You will master clean coding standards, SOLID design principles, test-driven development, unit and integration testing strategies, and effective debugging techniques. These principles are demonstrated through practical examples such as service-layer implementation, data transfer object mapping, RESTful endpoint validation, real-time communication systems, and analytical processing of external data sources. By the end of this book, you will possess the technical and structural skills required to build high-performance, secure, scalable, and maintainable backend systems suitable for enterprise, startup, or freelance production environments. The knowledge presented is entirely grounded in open-source technologies and widely accepted engineering practices, making it suitable for professional development, academic studies, and real-world deployment. This is not a simple introduction to programming. It is a full blueprint for constructing reliable, modern backend systems from foundation to production.

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