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André Arko

Staff Developer

André Arko

André has 20 years of software experience, focusing on frontend development, backend development, site reliability and developer tools.

Work with André

Hi! I'm a staff software engineer who has been building web applications since 2003.

André Arko thinks Ruby is pretty neat. As Cloud City Development Senior Developer, he’s known for well-tested code that is maintainable over time. He is passionate about clean, understandable code, believing every new feature is a chance to leave the codebase in better shape than it started.

No matter what software needs to be built, he offers specific examples of the trade-offs to keep in mind, and helps companies choose the most successful options. For over 12 years, André has built and run web applications, specializing in sharing knowledge via pairing.

Before docking at Cloud City, André was the lead developer of Bundler, the Ruby dependency manager, co-authored the third edition of The Ruby Way, a book about how to use Ruby in an idiomatic way, and founded Ruby Together, a non-profit trade association dedicated to maintaining and improving the shared tools used by every Ruby developer.

A regular speaker at industry conferences such as RubyConf, RailsConf, MagmaConf, Ruby on Ales, and RubyNation, he teaches at programming outreach events, and advocates for greater inclusivity in tech.

André spends a lot of time excited to be writing in or about Ruby. His code lives at, and his writings about code live at

Having been homeschooled for fundamentalist Christian reasons, André started college at sixteen and graduated before he could legally consume alcohol. It will therefore not surprise you to learn that his Netrunner card collection — including both the 1996 and 2012 editions, of course — is second to none.

He thinks computers are super cool even though they are also the worst.

If you think I’d make a good addition to your team, or you have a project that could use my skills, get in touch.

Public work



Lead developer

Blog posts

Ruby in 55 Seconds - Creating a New Bundle Gem

Sustainable Work from Home While the World Is Burning

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Work with André