Most developers have at the very least heard of the SOLID principles. It's a common interview question and is one of the most famous programming acronyms along with KISS, DRY or ... RTFM. Despite this, very little developers can actually give an in-depth explanation of what each letter in the acronym stands for, and even less use it in their day-to-day.

This talk aims to bridge those two gaps. Throughout the talk I'll be aiming to make two main points: the first one is that the SOLID principles aren't as mystic as most developers think. The second one is that far from being abstract concepts these principles can be used whilst building software on a daily basis, allowing developers to unlock robust and scalable code that stands the test of time.

A tentative outline of the talk would be the following:

• A breakdown of the different SOLID principles, illustrated with concrete examples, images and code snippets for every one of the letters.

• Using examples to show how FAKE production code can be improved by using these principles and highlighting the benefits of using these principles in production. For obvious reasons, I can't share Decathlon code but I'll give concrete examples about the principles and how to improve real life code.

• I'll end the presentation by opening and broadening the topic of SOLID code to other approaches to making code even stronger, more maintainable and scalable: function programming. This is just a conclusion and broadening of the talk and only features for thirty seconds.