Speakers

The Creator of Ruby

Ruby committer, nkf maintainer, working at Treasure Data Inc.

Nobody knows bad code like Justin Searls—he writes bad code effortlessly. And it's given him the chance to study why the industry has gotten so good at making bad software. He co-founded Test Double, an agency focused on fixing what's broken in software.

Working in Melbourne at Marketplacer. I enjoy working on Ruby on Rails projects, low level computing and encryption.

Amir Rajan is a pretty decent dev and is constantly trying to improve in his craft. He’s a jack of all trades, being comfortable with a number of platforms and languages. Last but certainly not least, Amir is the creator of A Dark Room iOS. This RPG conquered the world and took the #1 spot in the App Store and placed in the top #10 paid apps across 70 countries. It has been downloaded over 2.5 millions times and is a staple game in the App Store with over 25,000 five star reviews.

I am a geek but a senior software developer by profession, currently working for Equal Experts, India. When not programming, I spent time in exploring music around the world. Emacs is my text editor of choice. I love watching Japanese animes.

Chris is a Ruby developer at Red Hat on the ManageIQ core team. He enjoys working full time on open source software to manage The Cloud™ and has contributed to various projects in the Ruby ecosystem. Chris hails from Minnesota in the United States and also enjoys hockey, hiking, and tasty beers.

Eric Hodel is a ruby committer and maintainer of many gems. He works at Fastly on the API features team maintaining and building ruby services that customers use to configure their CDN services.

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 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.

A Web Developer focus on Interaction Design, and love Game, Animation and Comic. Current working on develop game and website.

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.

Franck is a software engineer. He specializes in Ruby and JavaScript, with a focus on performance.

Ruby Committer, Chief Engineer at GMO Pepabo, Inc.

Senior Cloud Engineer at iCHEF. Ruby lover. Full-stack developer.Organizer of Swift Taipei. iOS developer. FP lover.

A British Ruby/Rails developer, with a penchant for tweed, fine coffee, and homebrewing. When not deploying enterprise clouds, I help organise fun events around the world that teach people to program flying robots. I also occasionally speak at international conferences on the intersection of programming and robotics.

A software engineer working to improve developer's productivity at Cookpad Inc.

N/A

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 the 13 years life in university, now, he is a member of Matz's team in Heroku, 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.

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.

Research Fellow at CCS, University of Tsukuba. The author of NArray, a numerical library for Ruby.

A developer at IBM Toronto on the OMR project, Matthew Gaudet is focused on helping to Open Source IBM's JIT technology, with the goal of making it usable by many language implementations.

A Ruby committer. A BigDecimal maintainer.

Ritta graduated from university last September and now is working at Treasure Data.Inc. And he is maintainer of serverengine.

Kevin is a researcher at Oracle Labs where he works as part of a team developing a high performance Ruby implementation in conjunction with the JRuby team. 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.

Working in ClearCode Inc. He is interested in how to write clear code.

He is a core maintainer of concurrent-ruby, where he has contributed concurrent abstractions and a synchronisation layer, providing volatile and atomic instance variables. He is part of the team working on JRuby+Truffle Ruby implementation at Oracle Labs. He is a happy Ruby user for 10 years.

Money Forward, Inc. hire Shyouhei, a long-time ruby-core committer, to contribute to the whole ruby ecosystem. Being a full-time ruby-core developer, his current interest is to speed up ruby execution by modifying its internals. Doing so is not straight-forward because of ruby's highly dynamic nature. To tackle this problem he is implementing a deoptimization engine onto ruby, which enables lots of optimization techniques that are yet to be applied to it.

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.

member of Asakusa.rb, eiwa-system-management.

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

Aja lives in Seattle where she is a developer advocate at Google and a member of the Seattle Ruby Brigade. Her favorite languages are Ruby and Prolog. She also loves working with large piles of data. In her free time she enjoys skiing, cooking, knitting, and long coding sessions on the beach.

RESTafarian, freelance programmer, technology assistance partner at SonicGarden Inc., co-organizer of Sendagaya.rb (regional rubyist meetup), and facilitator of RESTful-towa (“What is RESTful”) Workshop.

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.

An 8 y.o. Rubyist, Hashicorp freak, DevOps enthusiast, system programming novice. One of the writers of books "Perfect Ruby" / "Perfect Ruby on Rails" (both in Japanese). He lives in Fukuoka - the "coast" city of "west" Japan, works at GMO Pepabo, Inc. as SRE/R&D/Dev Productivity Engineer, and holds Fukuoka.rb local meetup. He also is a organizer of RailsGirls Fukuoka #1.

Sameer is a student and a contributor to the Ruby Science Foundation, where he helps build scientific computation tools in Ruby. He is currently maintaining daru, a library for data analysis and manipulation in Ruby. He enjoys spending spare time with friends, books and his bass guitar.

I started using Ruby back in the Ruby 1.6 days, and I have used it in my daily professional life ever since. I'm fascinated by issues of application design, distributed architecture, and making hard things easy. I was also the last Ruby 1.8.6 maintainer. For entertainment, I read studies on exercise and nutrition physiology, and I like to run and bicycle long distances. This year will include my first 50k and 50m running races, and at least one 75 mile gravel bike race.

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

"nora" mrubyist. A member of Team Yamanekko. A member of TOPPERS Project. A staff of ET robocon TOKYO.