This book seeks to introduce the reader to the DevOps pattern, evolving to DevSecOps. It will then be taught and exemplified how to build a DevSecOps pipeline using the Jenkins tool for continuous delivery (CI/CD)." We'll also use SonarQube, learn about unit testing, functional testing, and API testing, and put all of this to work automatically. You will only commit your code and the pipeline will build, test, deploy and even test the user interface! At the end, you'll be able to mount a complete DevSecOps pipeline, automating the deploy and testing of your application, including simulation of clicks and insertions in the browser. It is an indispensable read for IT infrastructure developers and architects.