Functional Programming at AnyJunk

Lambda @ CWI

At AnyJunk we are a building logistics platform using Scala/Cats for the back-end and React/Redux for the front-end.

As a team, we are very fond of types and pure functional programming. We will explain why in a series of stories, and hopefully help demystify things like monads and category theory in general.

Before that, here is the stack we use at AnyJunk.

Back-End

• Scala to program
• Cats for: traversing Option, Future, and Seq/List monads; handling errors with ValidationNel; executing in parallel with Applicative.
• Akka HTTP for our RESTful API
• Circe to handle JSON
• Slick 3 to talk to our db
• Kafka and Monix for queues
• and a little bit of Shapeless when convenient

Front-End

• React JS for web components
• React Native for our mobile app
• Redux to manage state
• Redux Form for our web forms
• Flow for our types
• Immutable for our state
• React Styled Components for CSS
• Folktale for Maybe and Result
• Lerna for code reuse