Ruben was born in Breisach am Rhein in 1990. In 2010, after his civilian service, he went to the University of Mannheim to study Economics. With a visit to the Swansea University in Wales, he finished his bachelor's degree in 2013. In 2014 Ruben joined the CDSE via the Economic Research Track and started working as a teaching assistant. In 2017, Ruben visited Christian Brownlees at the UPF in Barcelona. In his spare time, he enjoys playing basketball, tennis, badminton, squash and goes to the gym.
Ruben currently receives a scholarship from Stiftung Geld & Währung.