Xavier Lapillonne leads the scientific computing team at the Federal Office of Meteorology and Climatology MeteoSwiss since 2019. He received a PhD in physics from EPF Lausanne in 2010, where he worked on massively parallel codes to simulate turbulence in hot plasmas. Since then he has been working in High Performance Computing and numerical weather prediction first at ETH Zurich and since 2015 at MeteoSwiss. He has participated and led several projects to port numerical weather prediction model to hybrid GPU systems, including the COSMO and ICON models, using various technologies such as OpenACC compiler directives and Domain Specific Languages (DSLs).