After his birth in the small town of Filderstadt, near Stuttgart in the state of Baden-Württemberg, he and his family moved to Erkrath, near Düsseldorf in the state of Nordrhein-Westfalen. There and in the neighbour town Hilden, he lived until he was 20 years old when he started studying business informatics in Berlin where he still lives today. From 2004 to 2013 he visited the elementary school in Erkrath. After that, he visited the Dietrich-Bonhoeffer-Gymnasium in Hilden where he made his Abitur in 2013. After he finished school, he worked shortly worked for the German settlement of Nordson in marketing and later for the German defense ministry. In 2014, he moved to Berlin where he started his study at the technical university of Berlin.
Dennis was and is involved in a number of projects. These include personal but also a number of joint works, mainly in software and web development. He is the owner of his self-founded company Rancboomer. He is also co-founder, partial owner, second manager and leading IT and development at CrowdClub GmbH and core member of the Smart Mobile Studio team. He has published a number of code and components libraries, designed several programming languages and has created some modifications for computer games.