ALT Screenshot of a message from Shopify's Ruby and Rails Infrastructure team that includes: Our dear friend and colleague Chris Seaton passed away last Saturday, December 3rd. Chris was an important part of our team at Shopify, and a notable figure in the Ruby community, and we are deeply saddened by our collective loss. Chris accomplished much in his life. He completed a Ph.D., rose to be Squadron Leader in the British Army Reserve, and started a young family. Chris began the TruffleRuby project in 2013 as an intern at Oracle Labs and stewarded it into a full-fledged Ruby implementation. Chris advanced the state of the art in dynamic language optimization, co-authoring 16 publications, contributing to countless others, and establishing both the Ruby Bibliography archive of Ruby research publications and the Ruby Compiler Survey. For his efforts, he was a Ruby Prize finalist in 2016. Chris’s papers, essays, and code contributions are currently archived at chrisseaton.com.