Jonas Nicklas is a Ruby developer from rainy Gothenburg, Sweden. He is the primary author of a number of open source libraries, including Capybara, CarrierWave and Evergreen. During the day he works for Elabs where he's written many applications, most of which are tested way too much. He's kind of obsessed about testing.

Ryan Bigg is a consultant for an Australian-based consultancy called RubyX. There, he code reviews, consults (duh) and writes code. On the side he had written a book called Rails 3 in Action with Yehuda Katz. Also, he contributes documentation to Rails such as the Configuration Guide and the Asset Pipeline Guide, which he has collaborated with other people on. You can find him on IRC as Radar or on Stack Overflow as himself.

Steve is a Ruby Hero, software craftsman, and aspiring digital humanities scholar. He maintains the Hackety Hack and Shoes projects, and started rstat.us. He blogs for a few blogs, including Timeless with Magnus Holm and The Changelog. He does lots of work around software education and literacy, the politics and philosophy of software development, and code as literature.

Pat Allan is a web developer usually located in Melbourne, Australia. When not caught up in code, he can be found helping organise Rails Camps and Trampolines. His thoughts are blogged semi-regularly at freelancing-gods.com, and he’s been known to make a mean pancake.

Darcy is a Ruby developer from Perth, Western Australia currently working for a local startup. In 2011 he was recognised as a Ruby Hero and works on many open source projects, including those for a youth-oriented not for profit in Perth called Youth Tree.

Software professional with more than 10 years experience in Software Development. RubyConfUA co-founder and RubyBarcamp Core Team Member, open source developer, contributor and rails_footnotes for Rails 3 gem maintainer. Code living at romanvbabenko@github.

I am a ruby developer and team lead with big (and dark) .NET enterprise development background. I started Ruby 3 years ago and was lucky enough to get inside complex and innovative projects and startups with multiple challenges. Now I work at one of the strongest Russian Ruby-teams and have a lot to share.

I am yet another Ruby developer, that knows all bottle necks of Software Development in Ukraine and trying to push forward IT industry in our country. Experience: 6 years IT, 3 years Rails. Personal open source projects: js-routes, datagrid, accept_values_for. Contributed to: rails, resque, resque-scheduler, vim-rails, sunspot, Mozilla Firefox, linkedin and many others.

Developer at Evil Martians. Developed: ren-tv.com, amplifr.com (kasta.ru, linrespectproduction.com, marinessa.ru), web interface to the Mandriva Linux Build System and many others. Previously worked in Lookatme.ru and Prophotos.ru. Graduated from Moscow State University, Computational Mathematics and Cybernetics dep.

Sergey has a great carrier from C++ Software Developer till Project Manager / Ruby Developer. He took part in such projects as RightScale Control Panel, RightSupport gem, RS Mobile Client, RightLink, goFIQ, Peer Media Customer Portal / Web Scanner, Moxi and The Futology Network.

Rubyist since 2007. Using Rails since 1.2.1. Loves RSpec and design patterns. Just started doing Erlang. Married.

KDE developer since 2002. KDevelop IDE maintainer and developer. Architected and developed Acunote, the project management application in Ruby on Rails. He contributed numerous performance optimization patches (now included in the mainline) to both Ruby and Rails. Now Alexander is the Director of Engineering at Acunote, leading the Ukrainian R&D team.

Dmitry — a HostPro CTO. More than 7 years of experience in IT. Was engaged in the hosting development specially configured for Ruby projects. Developed and successfully implemented the first cloud hosting in Ukraine — CloudHostpro, which is now available for Ruby developers.