We always try to integrate the knowledge we acquire in our practices, but Continuous Integration as many other paradigms requires breaking with your rules. In software engineering, continuous integration (CI) is the practice of merging all developers’ working copies to a shared mainline several times a day.[1] Grady Booch first…

Hexagonal architecture has become in a very popular layered architecture in the last years. I would like to explore the principles under this architecture and how to understand it. The hexagonal architecture, or ports and adapters architecture, is an architectural pattern used in software design. It aims at creating loosely…

A lot of developers are not able to distinguish between a good and a bad design and which are the problems of their code. Is your code The good, the Bad or the Ugly? I have been in a lot of conversations with other developers where they don’t have tools…

In someway or other in your company, there is a way to change things that are hard to change. The usual thing is having a committee of architects or similar roles who approve that change. That committee is a centralized way to change things. Why things are hard to change…

We tend to talk about this is good, this is bad when we talk about engineering practices, principles, designs, etc. In software everything is a trade-off, we need to understand what’s working best for the context we are working on. context: the situation within which something exists or happens, and…

Melvin Edward Conway submitted in 1967 a paper called “How Do Committees Invent?” to the Harvard Business Review. HBR rejected it on the grounds that Melvin had not proved his thesis, it was published later in Datamation. Anyway, I’ve seen Conway’s Law applied once and again in every of the…

I love TDD now, but when I started practicing I thought this was not for me, the majority of people who hate TDD think as I thought at the beginning of my journey, what did I discover to continue?. I started practicing TDD because the company where I was working…

How to add a new feature and deploy frequently (every 5 minutes to prod)?. We can use toggles and branch by abstraction. “Branch by Abstraction” is a technique for making a large-scale change to a software system in gradual way that allows you to release the system regularly while the…

How can we work in legacy code in small steps and pushing to main frequently?. Let’s discuss Golden Master technique. To me, legacy code is simply code without tests. I’ve gotten some grief for this definition. What do tests have to do with whether code is bad? To me, the…