The Vital Guide to Ruby Interviewing

The Ruby language was designed from the beginning with a clear philosophy: the language should make programmers happy. The result is a unique language full of quirky syntax and semantics that can sometimes seem a bit magical. While Ruby is often overshadowed by a certain web-development framework built on top of it, the language itself is versatile a well-suited to a wide variety of applications. The questions presented in this guide can be highly effective in evaluating the breadth and depth of a developer's knowledge of the Ruby language.

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Read a list of great community-driven Ruby interview questions.

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Jake VargheseUnited States
As an architect, Jake understands the process of solving complex problems that plague enterprise and medium size businesses. He is a full-stack problem solver--he can build entire apps from scratch or he can optimize an existing app already in the field.
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Joshua BallancoUnited States
Joshua is an architect, engineer, and scientist with experience building large-scale systems dealing with everything from massive amounts of video data to heavy web traffic to integration with a wide array of components in an SOA infrastructure. He's worked for Apple and AOL, and also led a group of 20+ consultants.
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Ted CohnUnited States
Ted is a senior architect, technologist, freelance developer, and entrepreneur with broad and deep experience developing award-winning products. He excels at working with small teams, as a team leader or alone. He is a high impact programmer with great communication skills, who pays great attention to detail.
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Filippo ConfortiItaly
Previously the lead architect for Gucci's eCommerce business, Filippo specializes in developing beautiful applications with Ruby on Rails, and has 9+ years of engineering experience. He strongly believes in TDD as the only way to build rock-solid code that makes his clients happy. He loves building for other developers too, by designing and creating the REST APIs they wish they had.
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Eqbal QuranJordan
Eqbal is a senior full-stack developer with more than a decade of experience working in web and mobile development. He is a masterful problem solver, and boasts an extensive portfolio of finished professional products.
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Mark Wong-VanHarenSpain
Mark is an entrepreneur, engineer, CTO, and artisan with decades of startup experience, including co-founding Excite.com. He makes complex problems simple with expressive, maintainable code. He believes in building small, well-tested, functional pieces, loosely joined by a well-documented contract.
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Mike HarrisUnited States
Mike is an experienced freelance Ruby developer who also has real world experience in JavaScript, C#, C++, Java, and SQL. He has more than 10 years of experience in a wide variety of environments, including IT consulting, in-house web development/data architecture, and freelance contracting.
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Graham PowrieUnited States
Graham is a designer and developer focused on creating custom web applications that automate and improve business processes, while remaining flexible for iteration. He's a full-stack developer who can deliver a complete product from start to finish individually, or alongside a team.
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Federico DayanArgentina
Federico is a passionate, senior, full-stack developer with more than a decade of experience working on the web ecosystem. He has extensive experience helping clients develop ideas and making them real. He believes that clean code and separation of concerns makes great software.
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James C RussellUnited Kingdom
James is an experienced Ruby, JavaScript and React.js developer. He has written his own web frameworks and almost 100 open source projects. He has contributed to famous projects such as RubyGems, RSpec, Merb, and Puka, and has spoken at several conferences.
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Great Ruby developers can use Ruby to build anything from the back-end of a web application to command line utilities on your computer. The language is dynamic, reflective, and object oriented. These are all familiar properties found in many general purpose programming languages, but can still require experience for a developer to be able to harness their true power. However, if you are looking for a Ruby on Rails developer, please refer to our Ruby on Rails Developer Job Description Template.

Writing a good job description and advertisement for a Ruby developer requires proper separation of concerns. Due to the popularity of Rails, it’s often possible for a generic Ruby job ad to bring in numerous applications from developers who specialize with Rails, instead of advanced Ruby developers.

This article will provide you with a sample Ruby developer job description that will help you write a perfect job ad, and assure that you find and hire the person that matches your specific criteria.

Ruby Developer - Job Description and Ad Template

Company Introduction

{{Write a short and catchy paragraph about your company. Make sure to provide information about the company’s culture, perks, and benefits. Mention office hours, remote working possibilities, and everything else you think of that makes your company interesting.}}

Job Description

We are looking for a Ruby developer responsible for building Ruby applications, including anything from complex groups of back-end microservices to command line utilities and data processing scripts. Your primary responsibility will be to design and develop these applications, and to coordinate with the rest of the team working on different layers of the infrastructure. Thus, a commitment to collaborative problem solving, sophisticated design, and building quality products is essential.

Responsibilities

  • Design, build, and maintain efficient, reusable, and reliable Ruby code
  • Ensure the best possible performance, quality, and responsiveness of the applications
  • Identify bottlenecks and bugs, and devise solutions to these problems
  • Help maintain code quality, organization, and automatization.
  • {{Add other responsibilities here that are relevant}}

Skills

  • Good understanding of the syntax of Ruby and its nuances
  • Solid understanding of object-oriented programming
  • Understanding of functional programming style in Ruby
  • Skills for writing reusable Ruby libraries that may be used in expressive ways
  • Familiarity with concepts of MVC, Mocking, ORM, and RESTful
  • Experience with popular web application frameworks {{such as Rails, Lotus, etc depending on project requirements}}
  • Familiarity with command-suite libraries, such as {{such as Thor and GLI, depending on project requirements}}
  • Knack for writing clean, readable Ruby code
  • Experience with both external and embedded databases
  • Understanding of fundamental design principles behind a scalable application
  • Able to create database schemas that represent and support business processes
  • Implementation of automated testing platforms and unit tests
  • Proficient understanding of code versioning tools {{e.g. Git, Mercurial or SVN}}
  • Familiarity with development aiding tools {{such as Bower, Bundler, Rake, etc}}
  • Familiarity with continuous integration
  • {{Make sure to mention other frameworks, libraries, or any other technology relevant to your project}}
  • {{List education level or certification you require}}
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