Speakers

Software Developer at Marketplacer in Melbourne, Australia. I'm passionate about open source and currently serving on the Bundler core team.

Ruby/Rails developer, cat and boxing lover. Currently working on Goby language https://github.com/goby-lang/goby as a junior language designer 😁

I'm an indie developer from Moscow. I work on different open source projects and builds Space-Rocket ships at night. I'm Hanami core developer.

Godfrey Chan is a member of the Ember.js core team and a Ruby on Rails core team alumni. He currently works at Tilde as an in-house Canadian. In his previous life, he was also an award-winning WordPress™ plugin author.

Joe is the JVM Platform Owner at Heroku, where he curates the JRuby experience in the Heroku cloud. He's worked with Ruby and JRuby for a decade, and wrote Deploying with JRuby 9k from the Pragmatic Bookshelf.

Noah works on Ruby for AppFolio, working on Ruby performance and related tooling. He wrote the book "Rebuilding Rails" about understanding Rails as "really just Ruby."

Developer from HeckPsi Lab in Shanghai. Ruby enthusiasts. Main Contributor to Project Midori.

Martin is a Professor of Computer Science at Aoyama Gakuin University in Japan. He has been one of the main drivers of Internationalization (I18N) and the use of Unicode on the Web and the Internet. He published the first proposals for DNS I18N and for NFC character normalization, and is the main author of the W3C Character Model and the IRI specification (RFC 3987). Since 2007, he and his students have contributed to the implementation of Ruby, mostly in the area of I18N.

Group Manager at KCS Carrot Corp. Member of Asakusa.rb, Chidoriashi.rb and Rails Girls Japan.

Eric Weinstein is the author of Ruby Wizardry (No Starch Press), an illustrated guide to the language for children. He enjoys writing Ruby, Clojure, Elixir, Idris, and Swift.

Chief Engineer of Syngram, small web and graphic design company. Ancient evangelist of Ruby. Author of some standard libraries in their original version.

After several years in Java and Ruby software development in Washington, DC, Mai left IT to pursue her passion for food and wine. She earned a Masters degree in wine science at the University of Adelaide, and continued on her journey, working in wine production in Australia, France, California, and New Zealand. Mai is now based in Wellington, and has since returned to the tech industry. Since then, she has been exploring ways to use technology to make wine more accessible to the public.

Charles works on JVM languages at Red Hat.

Terence leads Heroku’s Ruby Task Force curating the Ruby experience on the platform. He's worked on some OSS projects such as Ruby (the language), mruby, Bundler, Resque, as well as helping with the Rails Girls movement. When he’s not going to an awesome Heroku or Ruby event, he lives in Austin, TX, the taco capital of America. Terence loves Friday hugs, EVERY DAY OF THE WEEK! Give him a big one when you see him! In addition to hugs, he believes in getting people together for #rubykaraoke.

Ruby Committer, Executive Officer CPO at GMO Pepabo, Inc.

Software engineer

Programmer

Julian is a Production Engineer at Shopify working on developer productivity and experience. Working on the Shopify application, one of the larger Ruby apps out there, has provided a good look into performance related topics in the Ruby ecosystem that he is anxious to share.

A British Ruby/Rails developer, with a penchant for tweed, fine coffee, homebrewing, and deploying enterprise clouds.

I am a software engineer at Localytics in Boston, Massachusetts. I'm passionate about music, open-source software, and craft beer.

Ruby's godfather.

Koichi Sasada is a programmer, mainly developing Ruby interpreter (CRuby/MRI). He received Ph.D (Information Science and Technology) from the University of Tokyo, 2007. He became a faculty of University of Tokyo (Assistant associate 2006-2008, Assistant professor 2008-2012). After 13 years in University, he joined Matz's team in Heroku, Inc (2012-2017). At 2017 he joined Cookpad Inc. He is also a director of Ruby Association.

He is a free software programmer and the president of ClearCode Inc. He is also the namer of ClearCode Inc. The origin of the company name is "clear code". We will be programmers that code clear code as our company name suggests. He is interested in how to tell other programmers about how he codes clear code.

Software engineer at 5xruby.tw, Taipei, Taiwan. He is also a master student at the Department of Computer Science and Information Engineering at National Taiwan University, Taipei, Taiwan. He loves to create various applications from low to high level using Ruby and Rails. In his free time, he uses RGSS (Ruby Game Scripting System) to develop a large game project.

Masatoshi Seki is a Ruby committer and the author of several Ruby standard libraries including dRuby, ERB, and Rinda. He’s an expert in object-oriented programming, distributed systems, and eXtreme programming. He has been speaking at RubyKaigi every year since 2006 when the Kaigi first started.

'A MRI committer. He has been interested in testing, code coverage, and release management of MRI. He is an advocate of "transcendental programming" that creates a useless program like this bio.'.tap{|s|printf(t=%{'%s'.tap{|s|printf(t=%%{%s},s,t)}},s,t)}

Research Fellow at CCS, University of Tsukuba. The author of NArray and Pwrake.

I'm a volunteer with Safecast.org, an SRE with Elastic and a resident of Gifu, Japan. I've been working in Ruby since 2006 and authored a number of Ruby tools & resources including knife-solo.

A Ruby committer. A BigDecimal maintainer. I'm currently focusing on making Ruby a data-science-ready programming language.

Fumiaki is a developer at Quipper in Tokyo and an organizer of Nishinippori.rb. He's mainly developing web applications with Ruby on Rails for Quipper. His main interest is creating a productive development environment.

Software Engineer at Treasure Data.Inc. And he is a committer of fluentd/serverengine.

Nate is the owner of Speedshop, a Ruby on Rails performance consultancy. Nate has worked for several startups, including Craft Coffee (YC S14), Unwind Me (YC S14), Scaffold (500 Startups), Branch (now a division of Facebook) and many others. Nate is a contributor to several open source projects, such as Ruby on Rails, Puma and Sentry.


Kevin is a researcher at Oracle Labs where he works as part of a team developing a high performance Ruby implementation called TruffleRuby. He’s been involved with the Ruby community since 2008 and has been doing open source in some capacity since 1999. In his spare time he’s a father of two and enjoys playing drums.

A self-employed engineer in Hiroshima since 2011. Director of NVDA Japanese Team, an open-source community for developing / translating free screen reader. Doctor of Engineering (Waseda University)

Vice-president of Ruby Programming Shounendan.

https://github.com/onk/ Rails + iOS/Android programmer at Drecom Co., Ltd. Ruby Kaja 2013

Software Engineer at Actcat Inc. / RuboCop contributor(100+ commits) / Reek collaborator

CRuby committers all stars

Having spent some time in ACM ICPC competitions, social network development and bioinformatics, Valentin finally fulfilled himself helping other developers write a better code. Now he is a RubyMine (Ruby/Rails IDE) team lead, but, more importantly, JetBrains employee. Knows Java a little. Learning Kotlin and unicyclcing.

Rubyist and writer originally from Montreal living and working in Tokyo. I'm the author of Mobility, a pluggable translation framework for Ruby. I work with a team of developers at Degica building payment and e-commerce systems for the Japanese and Asian markets.

A Ruby committer, Director of Network Applied Communication Laboratory, and Secretary general of the Ruby Association

Soutaro is a software engineer working for SideCI, spending his time to develop program analysis for code review automation.

OSS developer/maintainer: Fluentd, Norikra, MessagePack-Ruby, Woothee and many others mainly about Web services, data collecting and distributed/streaming data processing. Living in Tokyo, and day job is for Treasure Data.

President of Ruby Programming Shounendan.

Ruby committer, Researcher of National Institute of Advanced Industrial Science and Technology (AIST)

Aaron works for GitHub. He is on the Ruby core team, the Rails core team, and the team that takes care of his cat, Gorby puff. Someday he will find the perfect safety gear to wear while extreme programming.

Thomas Enebo co-leads the JRuby project. He has been passionately working on JRuby for many years. When not working on JRuby, he is writing Ruby applications, playing with Java, and enjoying a decent beer.

Sameer is a student and a contributor to the Ruby Science Foundation, where he helps build scientific computation tools in Ruby. He is currently working on Rubex, a new language for easily writing C extensions for the CRuby interpreter. He enjoys spending spare time with friends, books and his bass guitar.

Shizuo Fujita Engineer in Ubiregi, Inc. A newbie of ruby committer.

Rubyist since 2000 (Ruby 1.4.6). Works for Network Applied Communication Laboratory. Is not a Ruby committer.

a Rails Developer. translated "Hello Ruby" series, programming picture books for children written by Linda Liukas, and "Programming Elixir" written by Dave Thomas into Japanese. one of the members of RailsGirls in JP.

Software engineer at Ubiregi inc. Author of Hyalite which is react like virtual DOM library. Member of Asakusa.rb, Chidoriashi.rb

Yuki is a Rubyist who was raised in Tokyo and a software engineer at Artsy in New York. He is a Ruby committer, the creator of the did_you_mean gem, maintainer of the Kaminari gem, and frequent contributor to many open source projects including Rails.

"nora" mrubyist. A member of Team Yamanekko. A member of TOPPERS Project.

Ukrainian programmer and poet with more than fifteen years of programming experience and ten years of Ruby programming. Working at Toptal, mentoring students (including Google Summer of Code-2016/2017, as a mentor for SciRuby organization), developing open source (Ruby Association Grant 2015).