A Couple Million Lines of Haskell: Production Engineering at Mercury

Ian Duncan March 30, 2026 [ Haskellers from the trenches ] # Production # Mercury

The editors of the Haskell Blog are happy to announce a new series of articles called " Haskellers from the trenches ", where we invite experienced engineers to talk about their subjects of expertise, best practices, and production tales.

Engineering rigour and artistic creativity are a fantastic combination, and this series aims to be the synthesis of these two aspects within the Haskell world.

I first heard about Haskell when I was sixteen, sitting in a high school computer science class where we were writing Java and learning, among other things, that NullPointerException was apparently a lifestyle choice if you decided to go into software development.…