Jiri has taught mathematics at all levels for well over a decade at several other institutions as well: San Diego State University, University of California at San Diego, University of Illinois at Urbana-Champaign, and University of Wisconsin-Madison. He has published over 30 peer reviewed scientific papers, mostly focused on complex analysis in several variables. Before jumping fully into mathematics, he was involved in programming and free software, in particular the GNOME desktop project, and he wrote several programming tutorials.