API Development in Go (Golang): A Complete Guide

The book "API Development in Go (Golang)" is a practical guide that will take you through all stages of building modern web services in Go. The author, Alexey Vetrov, shares proven approaches and real-world examples from commercial development.

What is this book about?

You will learn how to design, develop, test, and deploy high-performance APIs. The book covers both classic RESTful services and modern gRPC APIs. Special attention is given to performance, security, and scalability.

Who is this book for?

• Junior Go developers who want to learn building web services from scratch
• Middle developers looking to deepen their knowledge of API architecture and best practices
• Backend engineers transitioning from other languages to Go
• Team Leads who need practical patterns for building microservice architecture

What will you learn?

• Go language basics: structs, interfaces, goroutines, and channels
• RESTful API design: routing, request handling, validation
• Working with databases: PostgreSQL, MongoDB via drivers and ORM
• Authentication and authorization: JWT, OAuth 2.0, API keys
• Building gRPC services: Protocol Buffers, streaming, interceptors
• API testing: unit tests, integration tests, mock objects
• Documentation: Swagger/OpenAPI, protoc-gen-doc
• Deployment and monitoring: Docker, Kubernetes, Prometheus, Grafana
• Performance optimization: profiling, connection pools, caching

Why should you read it?

The book is written in a lively style with minimal theory. Each chapter contains practical exercises and ready-to-use code examples. You won't just read about concepts—you'll be able to apply them immediately. After reading, you will be able to independently develop a full-fledged API service ready for production use.

This is not just a textbook—it is a desk reference for anyone who wants to write high-quality, fast web services in Go.