Marek Kirejczyk is Founder of Universal Login and ETHWORKS. He has been part of blockchain community from 2013, when his company was working on first blockchain projects. For 3 years he focuses mainly on Ethereum. He founded Ethworks - a one-stop shop for blockchain projects, serving some of the top brands in the space, including Bitcoin and Ethereum foundations. Marek is an open-source contributor, leading the development of popular libraries like UniversalLogins, Waflle, and ethereum.rb. He co-organises Ethereum Meetup Poland - one of the biggest blockchain meetups in Poland.