Lefteris was born and raised on the island of Crete, Greece. He completed his undergraduate studies in Computer Engineering in Athens. As of 2022, he has traveled in most countries in Europe either working, studying, volunteering or simply exploring. He is a self-taught polyglot and a knowledge enthusiast. He often travels on his bicycle and spends most of his free time rock climbing or hiking. During the summer months he leads cultural tours with young adults while in the winter months he works as a software developer writing open-source code that helps small businesses grow.