Context. Software engineering is creative in nature. Software Engineers generate new ideas in many aspects of their private and professional lives. Problem. This thesis explores the topic of creativity and new ideas in the context of software engineering. Objective. We look at the kinds of ideas software engineers have, the factors that influence creativity in software engineers and the factors that support or hinder software engineers in committing to ideas. Method. We conducted an industrial case study among employees of a medium-sized German software development company. We used interviews as our primary data collection technique. We then extracted relevant information from the interviews via qualitative analysis. Result. The results showed multiple factors that influence creativity and idea commitment in software engineers. We also found that software engineers create different types of ideas based on their environment and state of mind. Conclusion. This thesis contributes to the current research. Our results serve as interesting starting points for further research on the topic of creativity and new ideas in software engineering.