User experience (UX) describes the way a user feels when interacting with a software and plays an important role for the user’s satisfaction with a software product. However, it is often neglected in business-to-business software products in spite of the fact that these are often very complex. Since a good user experience improves the customer‘s productivity, it can improve the economic success of business-to-business software companies as well. In this master‘s thesis, we focus on the German enterprise software development company Robotron Datenbank-Software GmbH. At the moment user experience does not play a central role in the development cycle at Robotron. Design decisions are not managed centrally, but are often made by software developers, which leads to additional costs, redundant programming efforts and limitations in the user experience. The goal of this master‘s thesis is to improve the actual situation sustainably by proposing changes to the software development cycle at Robotron. The basis for this are UX maturity models, which describe the sequence of stages companies process on the way to improve the user experience of their software. First, we analyze the actual development cycle at Robotron based on interviews that we conduct with Robotron employees. Then, we classify Robotron‘s current state into the UX maturity model by Nielsen and determine the next realistic UX maturity stage to achieve. We find out that the main requirements for this are the launch of an official user-centered design process, the creation of a centralized UX team, an iterative design development process, field studies and a stable UX budget. We develop a concept which proposes solutions for all these requirements and is based on an agile iterative design process. Moreover, we verify the concept by using it for a real UX problem in one of Robotron‘s products. For this we develop a high-fidelity prototype which shows first improvements of the user experience.