- Created the Slicknode open source headless CMS to declaratively create content management infrastructure with a GraphQL API- Created the leading open-source TypeScript library for analyzing the complexity of GraphQL queries to prevent resource exhaustion and DoS attacks (>1 million monthly downloads)- Built a fully managed and automated infrastructure as a service offering for the Slicknode CMS that creates a highly scalable content service in seconds

IT consulting and strategy. Helping companies from small startups to big enterprises to develop and modernize IT solutions in a variety of sectors (media, energy, e-commerce, travel, services).

- Led and implemented the architecture of the web user interface for the leading marketplace of music rights on the blockchain. Guiding and supporting the frontend engineering team with best practices and software quality. - Invented and led the implementation of a system to regulate traffic, prevent bot attacks and stabilize critical systems during high profile NFT drops (Nas, The Chainsmokers, Diplo, etc.) involving multiple teams.- Designed and built highly scalable analytics systems for customer facing applications (portfolio value from on-chain data, music streaming data analytics, etc.)- Designed and implemented the caching architecture across backend, frontend and devops teams.

- Helped design and implemented the architecture for the TravelSandbox, a framework to build web user interfaces for travel booking sites, used by major European airlines and travel providers- Helped plan and execute the migration from legacy UI technologies to ReactJS with a large codebase used by multiple teams- Implemented and maintained web user interfaces of major airlines and travel companies

- Built a platform for hyperlocal news in Germany that combines social network functionality with news and a local business directory.- Built a system for running geo-targeted context aware ad campaigns at scale. - Acquired by Rautenberg Media KG

Teaching design students to develop interactive interfaces and websites for desktop, tablet and mobile devices with HTML5, CSS3 and Javascript

Conception, development and design of interactive web platforms

Development of Flash (Video)-Chat Solutions, Payment Systems, Websites etc.

Development of Flash Videochat-Software

Selling, configuring, repairing and maintaining computer systems, networks and IT related hard- and software for businesses and consumers.