This book is a practical guide to improving the quality, stability, and observability of your APIs. Through a combination of theoretical insights and a hands-on example project, you'll learn how to create and maintain production-grade APIs that meet high standards of excellence. Better APIs: Quality, Stability, Observability is designed for developers and architects who want to deepen their understanding of API development and ensure their APIs are reliable, maintainable, and easy to monitor.

APIs are the backbone of modern software architecture, and ensuring they are of high quality, stable, and observable is critical to the success of any software project. This book provides you with the tools and knowledge to create APIs that meet these criteria, helping you avoid common pitfalls and ensuring your APIs can scale and evolve over time.

Among other things, you'll learn:

• How to build APIs that are well-architected, secure, and maintainable.
• Strategies for ensuring the stability of your APIs, allowing them to withstand external pressures and internal changes without compromising their core functionality.
• Techniques for enhancing observability, giving you the tools to monitor and understand your API's behavior in real-time, ensuring it's performing as expected.
• Practical methods for implementing continuous integration and deployment, automated testing, and proper documentation to support your API's lifecycle.
• How to apply these concepts to a real-world project, using the example of a fictional scenario to demonstrate best practices and common pitfalls.

Authored by Mikael Vesavuori, an experienced software architect and developer, this book is not just a theoretical exploration but a practical guide that will help you improve your API development practices.

Whether you're looking to refine your existing APIs or build new ones from scratch, Better APIs: Quality, Stability, Observability will provide you with the insights and techniques you need to succeed and create APIs that are not only functional but also robust, maintainable, and easy to monitor.

Domain Driven Microservices on AWS in Practice is your comprehensive guide to applying Domain Driven Design (DDD) principles to build robust, scalable microservices on Amazon Web Services (AWS). You'll gain hands-on experience in creating a serverless application architecture using real-world scenarios, Clean Architecture, and TypeScript. This book is designed to take you from a DDD novice to understanding and implementing a modern application that fully embraces these concepts.

Among software architects and developers, Domain Driven Design has become a cornerstone for building complex systems that accurately reflect business needs. Paired with the flexibility of microservices and the power of AWS, DDD allows for the creation of systems that are both highly responsive and resilient.

Among other things, you'll learn:

• How to effectively use DDD in the context of microservices, especially in a serverless environment.
• The role of strategic DDD in shaping your application's architecture and the tactical DDD patterns to implement it.
• Best practices for designing microservices with a clear domain model and how to map bounded contexts effectively.
• Implementing serverless architecture on AWS, including key services like AWS Lambda, API Gateway, and EventBridge.
• Techniques for ensuring smooth integration between microservices, handling cross-context transactions, and avoiding common pitfalls like distributed monoliths.

Authored by Mikael Vesavuori, a seasoned architect and developer, this book is not just a handwavy overview but a practical guide, taking you through the entire journey from initial concept to fully functional microservices. By the end of this book, you will have not only learned the essential theory behind DDD and microservices but also gained the confidence to implement these ideas in your projects, driving better design and more maintainable systems.

This book was written to be a key on-ramp for developers, architects, and anyone interested in modern software design. Whether you're looking to enhance your current skill set or embark on a new project, Domain Driven Microservices on AWS in Practice will provide you with the knowledge and tools you need to succeed.

Testing is often misunderstood or overlooked in the software development process, but it is a crucial aspect that can make or break the quality and reliability of your applications. This book is not just about teaching you how to write tests, but about helping you build the mindset and skills necessary to create software that is inherently testable and maintainable.

Testing for Software Engineers is a comprehensive guide designed for software developers who want to master the art of testing. It combines theoretical insights with practical examples, taking you through the entire process of building testable systems, understanding modern test automation practices, and applying them to real-world scenarios. With a focus on automation and quality, this book is your gateway to becoming a more proficient, confident developer who understands the critical role of testing in the software development lifecycle.

Among other things, you'll learn:

• The difference between testing and checking, and how the "Testing Industrial Complex" can lead to poor practices.
• Core concepts around testability and the essential characteristics of testable systems.
• How to integrate testing seamlessly into your development workflow, with a focus on continuous integration and delivery (CI/CD).
• Best practices for building deterministic systems, separating deployments from releases, and using feature toggles effectively.
• A detailed guide to various testing methods, including unit testing, smoke testing, API testing, end-to-end testing, and more.
• How to apply testing in modern, distributed, microservice-based architectures, with real-world examples using serverless technologies on AWS.

Whether you're a frustrated developer looking to improve your processes or a seasoned engineer seeking to refine your testing approach, Testing for Software Engineers offers the tools and insights you need to succeed. It is designed to be accessible to developers of all skill levels, whether you're just starting out or looking to deepen your understanding of testing.

This book is an essential resource for any software engineer who wants to elevate their testing skills and build more reliable, maintainable software.