I wrote two blog posts before on Elixir:

The first piece is longer, on my journey learning Elixir and building machine learning libraries.

https://fredwu.me/blog/2016-07-24-i-accidentally-some-machin...

The second piece is shorter, on Elixir’s functional aspect and how doctest changes the way I code.

https://fredwu.me/blog/2017-08-07-elixir-and-doctest-help-wr...