Senior Scala Developer
Scala developer for over 8 years, active in Polish Scala community. Curious about making the code correct by design. Author of blogposts, presentations and "Things you need to know about JVM (that matter in Scala)" e-book. Co-author of Chimney type-mapping library, who sometimes also contribute to other OSS projects.
In this presentation you will learn the source of your issues, and a third way - sanely-automatic derivation which is fast to compile, fast to run, and easy to debug by its users.