Lawrence Nahum is a technology entrepreneur, Bitcoin expert and executive with a strong focus in bringing innovative and disruptive tech to market. Lawrence is working at Blockstream as Chief Architect. Previously, he was CEO and founder of GreenAddress (https://greenaddress.it), a prime, Bitcoin services company that offers the industry's first and most advanced multi-signature Bitcoin wallet. Before getting involved with Bitcoin and Blockchain Lawrence was a technology Vice President at OTC financial services leader Markitserv where he led various products and technology teams and directed other strategic initiatives for the company. Lawrence holds a first class BSc Computer Science with Distributed System from London City University. Specialties: bitcoin, innovation, technology, internet, mobile apps, full development cycle management and team values.