Marcin Rzeźnicki is a programmer with close to 20 years of professional experience, mostly filled with immense displeasure of working in C#, Java or Ruby until I witnessed the advent of FP in the industry and regained the knowledge I'd lost leaving academia halls. Embracing Scala helped me to become born-again programmer, type system theorist and category theory hobbyist. I gave talks at meetups and conferences on subjects like: Kleisli arrows, dependent types and Free monads. I recently left Scala to devote myself to a clearly superior language: Haskell