Saarbruecker21 Berlin Business Angels

David Khalil

David is co-founder of SunshineSmile, a startup that helps its customers to have a beautiful smile by correcting malpositioning of teeth via invisible aligners.


Before SunshineSmile, David founded Affinitas (now Spark Networks), a global leader in online dating with activities in 29 countries.

Prior, David was part of the management team at European Founders Fund / Rocket Internet and a consultant at Boston Consulting Group.


David studied business. He is a father of three kids and a fan of Bayern Munich.


David’s strong suits are on- and offline marketing and finance.

Eric Ebert

Eric is one of the founders of Wando Internet Solutions, an international product/price comparison project. After studying business at WHU he joined a startup in the dating industry.


During the last years, he specialized in performance marketing, BI and tracking.


Being from Cologne, he is a great fan of Karneval and the glorious 1. FC Köln.

Johannes Kreibohm

Johannes is co-founder and managing director of Soyan VitaMed Natur, the company behind food supplements brand LINEAVI.


Prior to that he founded online games company Plinga and worked with Rocket Internet. Johannes holds a business degree and is an avid fan of Borussia Dortmund.

Johannes Schaback

After studying Computer Science and Machine Learning at TU Berlin and Shanghai Jiao Tong University, Johannes joined Rocket Internet as a Software Engineer in 2007.


In 2009, he founded LadenZeile and ShopAlike together with Robert Maier. which he exited to Axel Springer.

Since 2018, he is CTO and part of the management team of Home24.

Johannes has a passion for all technical concerns including BI, datawarehousing, data science and technical online marketing.


As the only real techie in the group, Johannes is happy to help with all questions orbiting around tech, mobile, development processes and machine learning.

Just Beyer

Just consults startups and grown tech companies in Product Management.


Following his studies at WHU, he initially worked in the investment team of European Founders Fund and Rocket Internet and since pursues his interest of building great applications with agile teams. This passion is second only to zoos, which he visits VERY regularly. 


Just is our point of contact for software development processes and product - particularly conversion optimization.

Lukas Brosseder

Lukas is co-founder of SunshineSmile, a startup that helps its customers to have a beautiful smile by correcting malpositioning of teeth via invisible aligners.


Before SunshineSmile, he founded Affinitas (now Spark Networks),  the operator of leading premium dating brands in 29 countries (e.g. eDarling, EliteSingles). Prior he was part of the management team at Rocket Internet. He studied business and supports the undoubted best German soccer team, Bayern München.


You want to go to Lukas for anything related to product, internationalization and pricing. 

Markus Winter

Markus was CEO at internetstores and leading E-Commerce Expert, with deep knowledge in Marketing, Usability, Business Intelligence and Retail Strategy.


Prior to his current role, Markus had several positions in E-Commerce and worked as a strategy consultant in retail projects. Markus is a big fan of KSC and as such has learned the meaning of real sufferring.


Markus will be a great asset for your marketing set-up & growth strategy.

Michael Schrezenmaier

Michael served as COO and MD of Spark Networks (NYSE:LOV) , a global operator of premium online dating services, until June 2019


After studying business at WHU and a brief stint at European Founders Fund, he worked for a number of years at Kuehne + Nagel, a leading logistics service provider.


You would want to talk to Michael about product management, internationalization (particularly to/in North America), M&A and payment processing.

Oliver Roskopf

Olli is founder of Lineavi, a fast growing brand in the nutrition industry.


Prior to this, Olli served as head of product for eDarling, managing director for Groupon Germany & Brazil as well as head of online marketing for Zalando. He studied at WHU and is widely known for his love of his hometown Cologne and its football team 1. FC Köööööln.


Olli can help on online marketing issues and has some insights into setting up private labels.

Pablo Metz

Pablo is founding partner of, a consultancy for professional football clubs and federations, focusing on performance management.


He is an alumnus of WHU and Tongji Unversity. Previously to ff.f, Pablo founded the kids brand wagalum and mbr targeting, an adtech company which he exited to Ströer.


Pablo is father of two and although he is working in the field now, his heart will always stay grün-weiß.


Talk to him about football (of course), but also about adtech and sales.

Philipp Kreibohm

Philipp is the founder of Home24, Europe's leading online retailer and platform for furniture and home accessories.


Before launching Home24, he was one of the founding Managing Directors of Rocket Internet. Prior, Philipp worked for BCG and Freshfields. He studied law and favors Borussia Dortmund.


Philipp is our go-to-guy for any ecommerce related topic.

Robert Maier

Robert is a founder of Visual Meta GmbH and acted as shareholder and managing director until 2018. Before founding Visual Meta, Robert worked for Merrill Lynch Investment Banking and About Change Ventures, a VC firm focused on internet and e-commerce companies.


Robert holds a degree in Business Administration from WHU