(Software) challenges at ASML ASML is a supplier of machines used in the semiconductor industry. These so called scanners are used when producing chips. To meet the increasing demands on accuracy and higher throughput, we continuously improve parts of the system, as well as the ways these are calibrated and controlled. Many of the improvements require changes to the control software of these systems. Next to these hardware improvements, mechanical imperfections are compensated by using complex algorithms. What are the challenges to develop such a system? How do we develop software for these systems? What comes into play? How is it like to work at ASML?