Xun (Brian) Wu has more than 17 years of extensive, hands-on design and development experience with blockchain, big data, cloud, UI, and systems infrastructure. He has coauthored a number of books, including Seven NoSQL Databases in a Week, Blockchain by Example, Hyperledger Cookbook, Learning Ethereum, and Blockchain Quick Start Guide. He has been a technical reviewer on more than 50 technical books for Packt Publishing. He serves as a board adviser for several blockchain start-ups and owns several patents on blockchain. Brian also holds an NJIT computer science M.Sc degree. He lives in New Jersey with his two beautiful daughters, Bridget and Charlotte.