Nik Graf initiated the ReactVienna Meetup in 2015. He has created several open source projects, including DraftJs plugins, Polished, and Belle, which all featured at Stripe's Open-Source Retreat in 2016. As a consultant/freelancer, he supports multiple companies with their frontend architecture using React and GraphQL. In addition to that, he produces video courses, which can be found on his personal website: https://www.nikgraf.com.
When React Hooks were released, Nik created a searchable collection of community-created Hooks at https://nikgraf.github.io/react-hooks/.