Overview

Code doesn't age well-unless you refactor it. In today's fast-paced development world, working with legacy systems is inevitable. Whether you're onboarding to an old codebase, cleaning up years of technical debt, or modernizing software for cloud environments, ""Refactoring Codebases"" is the hands-on guide every software professional needs. This book teaches you how to approach, understand, and evolve legacy code without breaking functionality. With proven strategies, real-world examples, and modern best practices, you'll learn how to simplify, restructure, and enhance code for better readability, maintainability, and performance. Inside, you'll explore: Proven refactoring techniques for large, complex codebases How to safely update code without introducing regressions Identifying code smells and architectural rot Modularizing monoliths and improving separation of concerns Modern tools for static analysis, testing, and automation Bringing legacy apps up to modern standards (CI/CD, containers, APIs) Patterns for rewriting vs incremental refactoring Building a culture of continuous improvement in engineering teams Whether you work in enterprise software, cloud platforms, or mission-critical systems, this book is a step-by-step guide to reviving old code and transforming it into clean, efficient, and future-proof software. Don't fear legacy-refactor it.

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