Prescreen GmbH is an established company; their main office is in Vienna, Austria.
Right now, what the company is primarily seeking is Sales, Help Desk, and Reliability Engineering professionals in Vienna. See below for a list of 5 unique vacancies at Prescreen GmbH, for instance "Customer Support Engineer (m/w)" and "Customer Support Engineer (m/w)".
Check out their social profile on Twitter - or if you are looking for a more unbiased description, try their Wikipedia article. Before applying, have a look at their company website to be well prepared for an upcoming interview.