Dr. Julian Kunkel, he is one of the principal investigators in the group Scientific Computing at the DKRZ. Since 2006, Julian has been working on tracing environments and tools for client and server-side I/O. In 2013, he defended his thesis about the monitoring and simulation of parallel programs on application and system level. Besides his main goal to provide efficient and performance-portable I/O, his HPC-related interests are: data reduction techniques, performance analysis of parallel applications and parallel I/O, management of cluster systems, cost-efficiency considerations, and software engineering of scientific software.