Galois has been building software systems in Haskell for the past decade. This talk describes some of what we’ve learned about in-the-large, commercial Haskell programming in that time. I'll look at when and where we use Haskell. At correctness, productivity, scalabilty, maintainability, and what language features we like: types, purity, types, abstractions, types, concurrency, types!
We'll also look at the Haskell toolchain: FFI, HPC, Cabal, compiler, libraries, build systems, etc, and being a commercial entity in a largely open source community.