Hadley Wickham is Chief Scientist at RStudio and Adjunct Professor at Stanford University, Rice University and the University of Auckland. Hadley builds tools (both computational and cognitive) to make data science easier, faster, and more fun. His work includes packages for data science (the tidyverse: including ggplot2, dplyr, tidyr, purrr, and readr) and principled software development (roxygen2, testthat, devtools, pkgdown). He is also a writer, educator, and speaker promoting the use of R for data science. Learn more on his website.