Why use Scala for building backend applications?

I am a Scala developer who had been working with Java and occasionally Javascript / Typescript for a few years before I transitioned to Scala and fell in love with programming all over again. I am currently working on a huge project for an international company that consists of many complex services written in various languages, using many different technologies. One of the services is written in Scala. The motivation for this blog post was the natural questioning of the use of Scala in the company, as well as my desire to comprehensively answer the question “Why should we use Scala?”.