Roberto Ierusalimschy is an Associate Professor of Computer Science at PUC-Rio (the Pontifical Catholic University of Rio de Janeiro), where he works with programming-language design and implementation. He is the leading architect of the Lua programming language and the author of "Programming in Lua" (now in its third edition and translated to Chinese, Korean, German, Japanese, and Russian).
Roberto has a M.Sc. Degree and a D.Sc. Degree in Computer Science, both from PUC-Rio. He was a visiting researcher at the University of Waterloo, ICSI, GMD, and UIUC, and a Tinker Professor at Stanford. As a professor at PUC-Rio, Roberto was the advisor of several students that later became influential members of the Lua community. Roberto is also a Distinguished ACM Speaker and a member of the IFIP Working Group on Language Design.