Sébastien Doeraene is a compiler/runtime systems hacker and a Scala enthusiast, now executive director of the Scala Center. He holds a PhD from EPFL, having worked under the supervision of Prof. Martin Odersky, and a master’s degree in computer science engineering from Université catholique de Louvain in Belgium. He is best known as the author of Scala.js. When he is not busy coding, he sings in choirs and a cappella groups such as the Ensemble Vocal Évohé, or rides around on a unicycle.