Here is a short blurb about me (232 characters):
Aaron Koenig is an entrepreneur, consultant, writer and film producer, specialised in Bitcoin and Blockchain technology. His company Bitfilm creates short commercial films for clients, most of them Bitcoin and Blockchain start-ups.
You may add this if you have more space (387 characters):
He has been actively promoting Bitcoin and Blockchain technology since June 2011 by writing about it and by organising events and meetups. He has also been a speaker and panelist at numerous conferences. Aaron is the author of the books A Beginner's Guide to Bitcoin and Austrian Economics and Cryptocoins - Investing in Digital Currencies.
And here is some more background info if you have even more space (512 characters):
Holding a master in communication and marketing from the Berlin Unversity of the Arts, Aaron has been working in the creative internet industry since 1994. He has created websites for clients such as MTV, ARD German Television, Die Zeit, Der Stern, Milka Chocolate and many others. His company Bitfilm has been working in production, distribution and event management for clients such as Deutsche Telekom, Vodafone, Kabel NRW, Swisscom, Nokia, Microsoft, Adobe, Intel, Apple, Axel Springer and many more.