David Turner joined Dropbox in 2013. He has more than 10 years experience working with databases such as Oracle and MySQL. He was drawn to MySQL because of his interest in database internals and a deeper understanding of systems architecture. With MySQL he has found he has more freedom to explore. His experience in working at larger shops such as Facebook, Pinterest, Sprint, and Zendesk has given him a strong understanding of scaling issues and of managing massive amounts of data and databases.
Whether adding indexes, altering enums, changing datatypes or reorganizing tables - there are right and wrong ways when production is involved.