I’ve been working on two big projects:

  • A book called Test-Driven Development with Phoenix. It builds a chat app by repeatedly writing tests from the outside in and consistently following the red-green-refactor cycle. You can find it at

  • A comprehensive testing LiveView course to help developers ship LiveView code confidently. You can find that at

Open Source

It’s thanks to open source software that I was able to become a developer. I now try to pay it forward by maintaining two Elixir libraries: ExMachina and Bamboo.

If you’re interested in following what I’m doing, you can find me as germsvel on twitter and GitHub or follow my RSS feed.