zathura-pdf-mupdf is written by:

Moritz Lipp <mlq@pwmt.org>
Sebastian Ramacher <s.ramacher@gmx.at>

Other contributors are (in alphabetical order):

Christian Hesse <mail@eworm.de>
Pavel Borzenkov <pavel.borzenkov@gmail.com>
William Skeith <wes@cs.ccny.cuny.edu>