Modernizing Software with Elixir: A Journey from Legacy to New Solutions

In this presentation, Anita Ludermann outlines a significant technology shift at Modell Aachen GmbH, where they transitioned away from outdated systems to adopt Elixir as their primary technology stack. Her talk explains the challenges faced during this migration, including integrating old and new systems, embracing functional programming approaches, and ensuring data consistency using Ecto. Ludermann highlights the importance of small, incremental updates and introduces the strangler fig pattern, showcasing a specific feature transformation from a legacy state to a modern solution. This journey emphasizes a collaborative effort within their team to modernize the existing codebase while minimizing user disruption.