The Vital Guide to Ruby on Rails Interviewing

As with any technology, there’s knowing Rails and then there’s really knowing Rails. This guide offers a sampling of questions that are key to evaluating the breadth and depth of a candidate’s mastery of the framework.

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Read a list of great community-driven Ruby on Rails 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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Orban BotondRomania
Botond is a highly skilled professional software developer who enjoys writing code that others can understand and follow. His passion for programming began when he was 13, after receiving a ZX Spectrum-compatible Russian PC from his father. He learned programming and became a true lifelong enthusiast.
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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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Teng Siong OngUnited States
Teng Siong is a freelance developer and entrepreneur who has helped build applications with millions of users. He started a company after his freshman year, which was later acquired. He has extensive experience working with early stage startups and helping them to build quick prototypes for market validation.
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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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Luís MartinhoPortugal
As an entrepreneur, Luís understands the importance of proactivity and results, and has learned the meaning of responsibility and accountability. He is more of a generalist than a specialist, though he loves the detail and deep understanding that comes from intense focus and work on development projects.
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Tiago SilvaPortugal
Tiago left his position at Microsoft to co-found Hive. From then on, building up Hive has led him through working on projects in every kind of language and environment, performing every skill imaginable from sales, to project management and hardcore development. For him, programming is an art form, and he gets a kick out of making his code as elegant as possible.
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Kenneth KalmerSouth Africa
Kenneth is passionate about solving problems, especially in an elegant and sustainable manner. He loves learning about anything, especially things that make his better at his craft. He has been up and down the web stack for the last 15 years, and does not seeing himself stopping anytime soon.
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A Ruby on Rails developer is responsible for writing server-side web application logic in Ruby, around the framework Rails. Ruby on Rails developers usually develop back-end components, connect the application with the other (often third-party) web services, and support the front-end developers by integrating their work with the application. However, if you are looking for an advanced Ruby developer, please refer to our Ruby Developer Job Description Template.

Ruby on Rails, as a framework, has gained popularity tremendously over a very short period of time. The goal of the framework is to reduce the time and effort required to build a web application. However, this puts a burden on the developer and their knowledge of the framework. This is especially true due to the convention-over-configuration nature of the framework. This article will provide you with a sample Ruby on Rails developer job description that will help you write a perfect job advertisement, and assure that you find and hire the person that matches your criteria.

Ruby on Rails 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 on Rails developer responsible for managing the interchange of data between the server and the users. Your primary focus will be development of all server-side logic, definition and maintenance of the central database, and ensuring high performance and responsiveness to requests from the front-end. You will also be responsible for integrating the front-end elements built by your co-workers into the application. Therefore, a basic understanding of front-end technologies is necessary as well.

Responsibilities

  • Design, build, and maintain efficient, reusable, and reliable Ruby code
  • Integration of data storage solutions {{may include databases, key-value stores, blob stores, etc.}}
  • Integration of user-facing elements developed by front-end developers with server side logic
  • 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

  • Experience with Ruby on Rails, along with other common libraries such as RSpec and Resque
  • Good understanding of the syntax of Ruby and its nuances
  • Solid understanding of object-oriented programming
  • Good understanding of server-side templating languages {{such as Liquid, Slim, etc depending on your technology stack}}
  • Good understanding of server-side CSS preprocessors {{such as Sass, based on project requirements}}
  • Basic understanding of front-end technologies, such as JavaScript, HTML5, and CSS3
  • Familiarity with concepts of MVC, Mocking, ORM, and RESTful
  • A knack for writing clean, readable Ruby code
  • Ability to integrate multiple data sources and databases into one system
  • Understanding of fundamental design principles behind a scalable application
  • Able to create database schemas that represent and support business processes
  • Able to implement 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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