There are a whole lot of “templating” libraries which do what you’re asking for. I have used Hiccup for Clojure and Giraffe for F# successfully, and you can probably find others for languages you already know.

This looks great!

Good to know! I’ve been using local testing and fortunately haven’t run into a case where the tests pass local and fail on their servers. Yet.

My most intense solution so far had been a very multi-core Knapsack solution. The tests they provided are pretty minuscule, which probably helped.

“it is developed just to be finished as quickly as possible and that’s it” You answered your own question.

In my experience, there are projects and workplaces where readable, maintainable code is expected and encouraged. Even in mobile development. You’ll find a place that appreciates your approach to coding, over time.