Roberto Ierusalimschy
Roberto Ierusalimschy (; born May 21, 1960) is a Brazilian computer scientist, known for creating the Lua programming language. He holds a PhD in Computer Science from the Pontifical Catholic University of Rio de Janeiro where he has an appointment as an associate professor of informatics. He did a post-doc at University of Waterloo in 1992 and was visiting professor at Stanford University in 2012. He is the leading architect and the author of "Programming in Lua". He also created LPeg, a Lua library for implementing parsing expression grammars.