Professional Go (Golang): Advanced Techniques

This book is not another introduction to Go syntax. It is intended for developers who already write in Go and want to move to the next level: learn how to design reliable, performant, and maintainable systems in Google's language.

The author, Alexey Sokolov, is a senior backend developer with 8 years of experience in Go, a contributor to several open-source projects, and an author of technical articles. In this book, he shares practical techniques that are rarely found in basic tutorials but are critically important in production development.

What you will learn:

• Concurrency without pain: deep understanding of goroutines, channels, fan-in/fan-out patterns, worker pool, and graceful shutdown. How to avoid deadlocks and race conditions.
• Memory management: how the GC works, how to reduce allocations, profiling with pprof, and escape analysis.
• Advanced work with interfaces: composition, type assertion, empty interfaces, and generics (when to use them).
• Architecture and testing: clean architecture, dependency injection, mocking, table-driven tests, and integration tests with testcontainers.
• Profiling and optimization: CPU, memory, blocking profiles; benchmarks and flame graphs.
• Error handling: wrapping, sentinel errors, custom error types, and logging.

Who this book is for:

• Go developers with 1+ year of experience who want to deepen their knowledge.
• Backend engineers transitioning from other languages (Java, Python, C#) to Go.
• Tech leads and architects designing microservices in Go.

The book contains over 50 real code examples, ready to use in projects. Each chapter concludes with practical exercises and self-assessment questions. You will learn not just to write code in Go, but to create production-grade systems that are easy to maintain and scale.

Special attention is given to typical mistakes: how not to "shoot yourself in the foot" with goroutines, why interfaces are not always the best choice, and when generics are truly needed. All examples are tested on Go 1.22+.

This is not just a book — it is your navigator in the world of professional Go. After reading it, you will be able to confidently pass technical interviews at the Senior Go Developer level and design architecture that can withstand the load.

Additional materials (source code for all examples, checklists, and project templates) are available in the GitHub repository via the link inside the book.