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Ultimate guide to hire JRuby developers

Worried about the hassles of hiring a JRuby developer? Check this guide to know about skills to look for, interview questions, and more!

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Ultimate guide to hire JRuby developers
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How to hire top JRuby developers? Skills to look for, interview questions, and more

JRuby brings the unparalleled simplicity of Ruby together with Java's power and versatility. Proficient Jruby developer opens up the possibility of capitalizing on this robust combination. They acct as catalysts in empowering your technological advancement, converting challenges into opportunities for growth.

However, hiring top JRuby developers isn't as easy as it appears, especially because of high demand and a limited talent pool. The process is more complex and time-consuming for hiring managers with no IT background. Turing's AI-powered deep vetting platform helps recruiters hire JRuby developers who can build and maintain highly functional, scalable, and customized applications.

Besides, we have created an excellent resource that can aid in interviewing potential candidates and building an efficient team for your projects.

Let's get started.

Skills to look for in a JRuby developer?

At a high level, hire top JRuby developers who have the following skills in their arsenal:

1. Strong understanding of JRuby on Rails

You should hire JRuby programmers who know how to deploy your Rails application using the JRuby platform. It is critical that the developer is able to move MRI to the JRuby platform smoothly and with relatively little pain. However, the community offers a very convenient tool to make this process very easy and manageable.

2. Experience with front-end development technologies

The front-end is the layer through which the user interacts with the application. That’s why it is important that you focus on designing your application in a way that is efficient and easy to use. Hire the top JRuby developers who can keep all UI/UX elements in mind while creating or updating the application. Ensure that the application has experience working with technologies like JavaScript, HTML, and CSS.

3. In-depth knowledge of databases

Data is the center of today’s technology, and businesses cannot function without them. Profound knowledge of relational and non-relational databases enhances the developer's ability to construct, query, manipulate, and manage complex data structures. Also, familiarity with Java's JDBC and Ruby's ActiveRecord is crucial for seamless database interactions. So, you should hire JRuby programmers who have basic knowledge of relational and non-relational database technology and DBMS fundamentals.

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4. Testing and debugging skills

Testing is one of the crucial aspects of software development. It ensures that the developed application is of high quality and is functioning as expected. There is no doubt that bugs are regular occurrences during the development process. So before going for the real-time launch, a quality check of the software should be done. Hence, when you hire top JRuby developers, ensure that the applicant has solid testing and debugging skills.

5. Expertise with version control tools

When you hire JRuby developers ensure that they understand code management tools like Git and also know how to work with some of the features such as making a new branch, pulling and pushing code, etc. These tools allow developers to keep track of any changes made in the code. Which can come in handy to resolve any mistakes made during the development process. Developers can just compare the code with the previous stable version and identify and resolve any issues.

6. Experience in Object-Oriented Programming

The key concept of object-oriented programming or OOP is objects and classes. Wherein, Objects represent the real-world entities and a class defines the behavior of those entities. So, before you hire JRuby programmers, make sure they are familiar with the fundamental concepts like the difference between inheritance vs composition, how to create lambdas and other OOP concepts.

Create a hiring funnel

Creating a hiring funnel will provide you with numerous benefits, like assisting you in identifying the top skills to hire top JRuby developers who will fit into your company's culture.

What Turing does for you

Candidate screening
Candidate screening

We will help you select the best talents and spot a JRuby developer who will fit in your company culturally.

Test task
Test task

We verify if the candidate really wants to work at your company and is able to spend 5+ hours to prove it by rigorous tests. It helps us to see a developer's caliber.

Technical test
Technical test

Developers are asked skill related questions and made to solve tricky problems. We use open questions. The goal is not only to test developers’ knowledge – we also want to find out their way of thinking.

Giving specific feedback
Giving specific feedback

We provide explicit feedback on both the test task and the technical test after we have checked the developer's expertise.

What you do


You can interview the shortlisted developers to check if the candidate matches your requirements and is a good fit for your company.


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Top interview questions to hire JRuby developers

Hiring for a new skill can be a daunting task even if you’ve been a part of the recruitment process for quite some time. But it is also critical to the success of your project that you hire JRuby programmers who are the right fit for your team. So, if you’re looking for questions that you can ask to test the applicants, here’s a list that you can refer to.

JRuby is a Ruby interpreter built on JVM. Since it is written in Java instead of C which the standard Ruby interpreter is written in, it enables the usage of Java classes and libraries with Ruby syntax.

This question will help you assess if the applicant can play into the strengths of this programming language. Ensure that their answer includes key benefits like - pure object-oriented, open-source, metaprogramming, clean and simple syntax, and more.

Though Ruby programming language has many benefits, there are few disadvantages or setbacks that come with it. For example, linking to more than one database at a time, connecting to multiple database servers, and utilizing foreign keys in the databases are a few of them. Ensure that the applicant is able to specify these limitations along with the ways to resolve them.

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Here are some more JRuby developer interview questions that you can ask to assess a developer’s caliber.

  • JRuby on Rails vs Ruby on Rails. Explain the difference.
  • How to install JRuby and required gems?
  • Explain the role of modules and mixins in Ruby.

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Turing offers top-quality, cost-effective, and highly productive JRuby developers who belong to the top 1% of the world's remote developers. All Turing JRuby developers are selected only after going through a series of rigorous tests where their skills are deeply vetted. Daily standups are mandatory for every Turing developer as they keep the developer and the customer in alignment with the discussed goal. All Turing remote JRuby developers work for at least 4 hours in your time zone for your convenience.

Hiring JRuby developers is not a hassle anymore. Turing will get you the best talent who contributes to the growth of your company. Find the best pre-vetted developers from across the globe in 4 days at a budget price with Turing.

Turing has created the first and only AI-powered deep-vetting talent platform to vet remote developers for a Silicon Valley bar. Turing tests developers based on actual skills vs. self-reported experience from traditional resumes or job interviews. Every developer at Turing has to clear our tests for programming languages, data structures, algorithms, system designs, software specialization, frameworks, and more. Each Turing developer goes through our automated seniority assessment test comprising 57 calibrated questions in 5 areas — project impact, engineering excellence, communication, people, and direction.

JRuby is a Ruby interpreter on the JVM which means it is a Ruby interpreter written entirely in Java. It enables the usage of Java capabilities with Ruby syntax and supports all built-in libraries. Acquire Turing's assistance to hire the best JRuby developers out there as it’s providing remote developers at a reasonable price.

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