Haskell is Eating my Rails App from the Inside Out

Explore NoRedInk's ongoing journey of gradually migrating from Ruby to Haskell in this 45-minute conference talk from Lambda Days 2025. Learn practical strategies for replacing imperative codebases with reliable functional code without disrupting business operations or halting feature development. Discover the challenges and solutions involved in transitioning large-scale applications, including architectural decisions about using separate servers for each language, separate processes on the same server, or combining both languages into a single program. Gain insights into real-world experiences of incremental migration from an imperative Rails application to functional Haskell code while maintaining continuous business operations and customer feature delivery.