roman.geus@psi.ch Roman Geus studied computer science and obtained a PhD in scientific computing at ETH Zurich. He is now working for Paul Scherrer Institute developing simulation software for particle accelerators. His interests lie in high performance computing, numerical algorithms, linear algebra and of course Python. Roman Geus is the author of PySparse (sparse linear algebra package for Python) and PyFemax (computation of electro-magnetic fields in bounded domains using Python).