Hey! I'm Karsten, expert in conversion optimization ande-commerce strategy.

Accessories for dogs and cats from Bielefeld. A family business since 1980, around 170 employees, production mostly in Germany. I'm responsible for the ongoing conversion optimization of the online store. Every decision is backed by Mixpanel data. New features from the product page through to checkout I implement myself.

Organic superfoods, whey and collagen from a family business with over 20 years of industry experience. The starting point: a shop performing below its potential. I analyzed user behaviour and structure, rethought the UX and fundamentally rebuilt the shop.

SMINA is building the medical supply store of the future – individually tailored aids for clinics, care facilities and home use, available in more than 200 partner branches. I supported the internal dev team on their headless Shopify storefront and fundamentally refactored the codebase. The result: faster pages, an architecture the team actually understands, and a much shorter path from idea to launch.

Rummel Matratzen has been manufacturing high-quality mattresses in Bavaria since 1948 – a product that needs explaining before it sells online. I built them a custom headless Shopify storefront: fast product pages, a structure that guides customers through the choice, and a foundation their direct sales can grow on.

The University of Hohenheim is a leading university in agricultural sciences, natural sciences, and economics and social sciences. I was involved in developing the concept for digital learning platforms.

Telekom is Germany's leading telecommunications provider offering services from mobile to internet to TV and business solutions. I developed frontend solutions with a focus on performance optimization and accessibility.

The Federal Republic of Germany continuously modernizes its digital infrastructure for citizen services and administration. I implemented an information platform.