Event store is a proper name for a..., well, storage of events. Events are facts from the past. Such a trait makes our storage a great candidate for append-only mode, ie. there are only two operations available: read...

There's a red alert in your mailbox and you know exactly what it means - the system is down and you have a 500 error on a specific action. Your response is clear - you find the bug and fix it as fast as you can.

Some time ago, I was discussing the possibilities of Kotlin and Elixir with a colleague. Our rather academic exchange only lent further credence to the notion that every developer has their own point of view and...

At Monterail we have fancied the Elixir language for quite a long time. However, for some reasons, we failed to get it into production usage except for a few minor implementations. And I felt like this should change. So...

Recently, we have decided to expand our DevOps stack with the addition of Terraform for creating Infrastructure as Code manifests. It became obvious from the start that local backend is not an option, so we had to set...

If you've ever been working on an application with a domain concept like organizations I bet you had to struggle with custom features, behaviors and complete white labels. Most young fellows start such with the if-else...

There are only two hard things in Computer Science: cache invalidation and naming things. This old truth is surprisingly significant about web development today since it doesn't mention one underestimated topic -...

Every young developer gets to know the most common rules in programming quickly, either by their own research or by code review comments. Write small classes and small methods/functions. Be SOLID, Don't Repeat Yourself,...

A recent confession by Piotr Solnica started another bit of drama in the Ruby world. I started writing this post just after reading Fabio Akita's response to Piotr's post - for me it shows all the problems with Rails'...

A year after the first European Elixir conference, the language doesn't rule the world just yet. Nonetheless, the recent edition of the conference shows that alchemists are on the right way to making it happen. Let me...

I grew up in the golden era of monthly magazines about computer games (rest in peace Reset and Świat Gier Komputerowych). I was so crazy about them that I would look through the window by telescope to verify if a new...

There are dozens of articles about Code Review (you will find some links at the bottom of this article), but from time to time it is a good idea to revisit the basics or just find everything you know about the topic for...

So you are a young developer. You are close to or have already finished your studies and decided to get your first job. You will start working in a team - that's the main difference between the job which you will be...

The snowball effect has just started. While the ball remains quite small, it is still big enough to be seen and it will reach full speed soon. If you don't want to find yourself in an avalanche, you should start...

Imagine such a case: you're developing another e-shop. You've got products and a basket. You write some obvious tests:

TL;DR We have prepared a sample app with nothing more than the necessary configuration and a single, oversimplified spec file. You can find it on github now or first you can get more details about it below.