In this post, you will learn how easy it is to create a virtual machine with AWS EC2. You will learn the basics and as an example, you will deploy and run a basic Spring Boot application. Enjoy!

Clean Architecture, Onion Architecture, and Hexagonal Architecture (aka Ports-and-Adapters) have become the norm for backend system design today. Powerful influencers have promoted these architectures without stressing enough that they are (overly)complex, exhaustive blueprints that need …

A common problem when automating tests are tests which require a visual comparison to a previous state. This can be a very time consuming task when you need to execute many of these testing tasks. …

In this post, you will learn how to execute penetration tests with OWASP Zed Attack Proxy (ZAP). ZAP is a free web app scanner which can be used for security testing purposes.

If you attend conferences or read technical articles, you could think that microservices are the correct and only way to build a system at the moment. Despite some pushback from cooler heads, the default architecture is microservices. In this post, I’d like to argue why it’s wrong. I’ll first get back to the origin of microservices and the fundamental reason to use them. Then, I’ll describe why microservices don’t fit most organizations' structures. Afterward, I̵

Testing software will tell you something about the quality of your software. But how do you ensure that your tests have a high quality? A static analysis tool can help you in order to improve the q…

How does Spring Boot support building a 12-Factor app? What do we have left to do?

About 3,5 years ago, I started this blog. Why have I done this and has it brought to me what I expected it to be. In this blog, I will look back at the past 3,5 years and share my experiences. It w…

In this blog you will learn how to monitor a Spring Boot application. You will make use of Spring Actuator, Micrometer, Prometheus and Grafana. Seems a lot of work, but this is easier as you might …

Learn how to use our radar creation exercise to have a conversation across all organizational levels and review your entire technology portfolio. Find out more.

Every now and then, the idea of contributing to Open Source Software crosses the mind of every developer. However, often, it just remains to think about it instead of actually doing something. In t…

We have revisited the process of technology selection at Zalando, adjusted the Tech Radar ring semantics, and moved towards principle-based decision making. In this post, we would like to share...

Creating a continuous deployment pipeline will bring us a step closer to an automated build, test, deploy strategy. In order to create such a pipeline, we need to have access to several tools. Inst…

In this post, we will create a Spring Cloud Function and create some unit tests for it. We will do so by creating a function with Bean definition and with the functional style. At the end, we will …

A set of guidelines for designing APIs that are consistent with Google AIPs.

In this post, we are going to explore how we can deploy a simple Spring Boot application to AWS Elastic Beanstalk. We will explain how to setup an AWS account and provide a step-by-step guide how t…