How uses Elixir is a social change platform, with over 400 million users worldwide. Two years ago, their engineering team faced a challenge to migrate their messaging system from an external vendor to an in-house solution, to reduce costs and gain flexibility.

This article will discuss how they approached this problem, why they chose Elixir, and how their system grew to deliver more than 1 billion emails per month. is also hiring Elixir engineers to join their team.