Sebastian Grebe is a verified computer science expert for application development. He is a young entrepreneur working on a variety of products. He specializes in web development using modern technologies such as React and FeathersJS, but also traditional technologies such as PHP and SQL. Furthermore, he developed professionally by merging old and new applications, and developing cross-platform apps with React Native and Ionic. Currently, he is actively working on his software agency, called Open Mind, which manages various software projects. He is also actively pushing a social network app that utilizes React, Apollo, and Cordova, which is called Coupled. He has worked for various companies as a software engineer and project manager, such as DB Netz AG.