Mario Arias is a software engineer and Spring certified instructor with more than 12 years of experience in software development and design, databases, training material design, and training delivery. He currently works as a software engineer in Manchester, UK, for Cake Solutions Ltd., a BAMTECH media company. Mario is well-known member of the Kotlin community and is part of the Arrow team, the group that developed and maintains the Arrow functional library. In his free time, he rides his bicycle and trains Brazilian Jiu-Jitsu.