We’ve contracted out to several companies, currently Tweag, Well-Typed and Foxhound Systems. We primarily contract for improvements to GHC (the compiler) and HLS (the IDE tool), especially on performance.Contracting is helpful because it lets us focus on building our product, and enlist GHC experts for work on compiler performance. This is especially helpful because those people often have a pretty good idea of where to begin, or have already in-progress work that a new developer wouldn’t know about.That said, we’re now large enough to start to build our own in-house teams for this – we just hired our first GHC developer.