All You Need To Know When Hire Ruby On Rails Developers

If you’re reading this, you’re presumably thinking about hiring Ruby on Rails developers. Let’s face it: it’s difficult to locate a good specialist these days. How do you hire Ruby on Rails developers in Vietnam? This article may serve as a starting point for your search for Ruby on Rails specialists.

Before we get into how to discover ruby on rails programmers for hire, let’s first define Ruby on Rails and why it’s such a popular technology.

Ruby on Rails, usually known as Rails or RoR, is a Ruby-based server-side web application framework. The Model-View-Controller (MVC) concept underpins Rails.

1. What Is Ruby on Rails?


Ruby on Rails is software code that is developed on top of the Ruby programming language. It is technically defined as a RubyGem package library that is installed through the operating system’s command-line interface. Ruby on Rails is an open-source web development framework that gives Ruby on Rails developers (ROR developers) a faster way to write code. It is a collection of code libraries that provide a ready-made solution for repetitive activities such as creating tables, forms, and menus on a website.

To create web programs that run on a web server, it integrates the Ruby programming language with JavaScript, HTML, and CSS. Ruby on Rails is classified as a back-end or server-side web application development platform because it runs on a web server. Ruby on Rails is analogous to PHP on Laravel and Symfony, or Python on Django. The main attractiveness of Ruby on Rails to developers lies behind the language’s simplicity and elegance. It is intended to aid agile development by increasing productivity and flexibility for development teams.

2. Why Ruby on Rails?


In an interview in 2005, Rails designer David Heinemeier Hansson noted, “Ruby is an exceedingly easy programming language to utilize for building web apps.” Ruby is a general-purpose programming language with a refined syntax that does not necessitate excessive punctuation.”

When compared to Java, Ruby is more streamlined because it does not require considerable code to generate fundamental structures such as data fields. In addition, Ruby makes it easier to use high-level abstractions like metaprogramming.

According to the 2019 Stack Overflow developer survey, Ruby ranks 15th in the TIOBE index and is the 6th most expensively paid language globally. Ruby is ranked 12th in GitHub’s Top Programming Languages.

RubyGems, Ruby’s trump card, aids in the rapid creation and sharing of software libraries that enhance Ruby. RubyGems provides a straightforward way for installing gems, and the RubyGems website is where you can find the most recent version of Rails. It’s the right choice to hire Ruby on Rails developers for your company

3. What Is A Ruby on Rails Developer?


Ruby on Rails, as a framework, has exploded in popularity in a relatively short period of time. The framework’s purpose is to reduce the time and effort required to create a web application. This, however, places a responsibility on the developer and their understanding of the system. This is especially true given the framework’s convention-over-configuration nature.

A Ruby on Rails developer is in charge of building server-side web application logic in Ruby, based on the Rails framework. Back-end components are typically developed by ROR developers, who connect the application to other (often third-party) web services and assist front-end developers by integrating their work with the application.


4. What Ruby on Rails Developers Need To Know And Be Able To Do

You shouldn’t hire ruby on rails developers if you haven’t know what Ruby on Rails developers need to know. Hire ruby on rails developer is really risky because this will have a direct influence on your business.

4.1     Personal qualities

  • Working knowledge of enormous amounts of data
  • Analytical reasoning
  • Pay close attention to the details
  • Thinking that is organized
  • Ability to educate oneself
  • Reliability

4.2     Basic Skills

  • Ruby development knowledge and experience (syntax, methods, debugging, Ruby Gems)
  • Knowledge and extensive experience with HTML, CSS, and JavaScript
  • Advanced knowledge of Ruby on Rails
  • Databases such as MySQL, PgSQL, Redis, Postgres & MySQL, MongoDB, and others are used with ease.
  • Composing complex queries
  • Making use of Git history
  • Creating a working environment and utilizing development tools
  • Testing abilities and competence in the use of several testing frameworks (unit, functional, and integration testing, mocking web services and third-party APIs: RSpec shared_ *, mocks, Capybara, database cleaner, WebMock, VCR, MiniTest, Cucumber, and so on).
  • DevOps fundamentals
  • Extensive experience designing apps, high-load-resilient systems, and interfaces, among other things.

5. RoR Developers’ Levels of Expertise

When hiring Ruby on Rails developers, Each level of skill depth, in particular, is distinguished by a distinct set of prerequisites, which will be discussed more in this article.

Typically, skill levels are divided as follows:

RoR Developers’ Levels of Expertise

In actuality, this distinction has little to do with reality. It is apparent that it is dependent on more than just years of expertise. You should be aware when to Hire Ruby on Rails developers that the amount and quality of past assignments have a significant impact on your skill level.

5.1     Junior Rails Developer

Junior Ruby on Rails Developer

The junior Ruby on Rails developer, in essence, conducts minor tasks under supervision and is self-motivated to learn new abilities.

A junior developer, on the other hand, is not a trainee and has a basic understanding of Ruby, data formats linked with it, and core project procedures such as the Red-Green-Refactor cycle, unit-testing, working with Git, RDBMS, Linux, and code editors.

5.2     Middle Ruby on Rails Developer

This Ruby on Rails developer is well-versed in the fundamentals. This is a stage of transition for an intermediate who has been working for more than three years and is preparing to advance to the senior level.

5.3     Senior Ruby on Rails Developer

Senior Ruby on Rails Developer

Such a person is capable of completing any task faster than others and producing a high-quality piece of work. They usually contribute to open-source Ruby projects or Ruby code. And preserve blogs where only relevant content involving their own work outcomes and research are published.

Such professionals typically have 5+ years of expertise, embrace the company’s ideals, and initiate efforts that tackle a wide range of project issues. Hire Ruby on Rails developers at this level you will get credibility.

6. In-house, Freelance, or Development Company: Who To Choose?

6.1     In-House Development

In-House Development – Pros and Cons

This sort of software development entails utilizing your company’s own resources to create a product alongside your staff.

Simply put, in-house development necessitates the establishment of an office and the hiring of a team.

Advantages of In-House Development:

  • Control. When you recruit an in-house team, you have complete control over everything from the hiring process to work schedules and wages.
  • Easy communication. Of course, contact with your in-house team is faster because you can just access the developers’ section and discuss whatever you want. You may also see the progression. From a psychological standpoint, this is unquestionably an advantage.

The disadvantages of in-house development:

  • Increased cost. When you hire Ruby on Rails developers in-house team, you are not only investing money on salary. You must also organize and supervise the operations inside the team, as well as pay taxes. True, if you are not prepared to incur all of those management and labor costs, employing an outsourced staff would be a simpler and more cost-effective choice.
  • Background in technology. It could be a problem if you, as the founder, have no technological background. In this situation, you will need to hire a CTO who will assist you in dealing with all development challenges and decisions.

On the other hand, a handful of businesses provide CTO as a service. We, too, provide this service at Sloboda Studio. For people who want a technical director but don’t want to invest a fortune.

6.2     Freelance Rails Developers

Hiring freelancers – Pros and Cons

How to find freelance Ruby on Rails developers? How to hire Ruby on Rails developers Freelance? Freelancers typically operate alone and remotely. It is critical that you select a dependable and dedicated programmer with whom to engage. As a result, we have essentially recognized the major (and critical) issue with independent specialists.

Advantages of Freelance Development:

  • Prices are low. Freelancers frequently charge lesser rates and incur no additional costs. Freelancers typically prefer to work alone and from home. You do not need to rent an office space or pay for labor.
  • Schedule is adaptable. Many freelance ROR developers are fine with having flexible working hours. Perhaps you will devise a work schedule that is convenient for you. Even if you’re in separate time zones.
  • Developers’ preference. When it comes to employing in-house developers, you are limited by your geographic location. However, freelancers are the same as offshore devs. This gives you access to a vast pool of ROR developers available all over the world.

The disadvantages of Freelance Development:

  • Risks. Freelancers are self-sufficient. They can be a little too self-sufficient at times. And there’s always the possibility that your freelance developer will abandon your project halfway through. We urge that you select freelancers with care. However, keep in mind that freelancing development is always the riskiest alternative. You should notice this when hire Ruby on Rails developers developers.
  • Control issues. You do not have complete control over their work. Alternatively, ensure that a freelance developer is working on your duties at any given time. You can, however, exert some control. Control the product development process with task-tracking systems.
  • There is no fear. In-house ROR developers do not want to be fired or have a bad reputation. Offshore businesses are frightened of negative feedback and a tarnished reputation. Freelancers only lose their rating on Upwork. However, this problem can simply be remedied by creating a new account. As a result, freelancers have almost no fear of disappointing the client.

6.3     Outsourcing Development Company

Outsourcing Development Company – Pros and Cons

As if you had employed them in-house, an external development agency would truly work for you. However, there is no need to be concerned about employment. Choosing the company, you may employ an entire Ruby on Rails team. Or only a single developer to handle specific responsibilities.

An offshore development company may also provide you with a far larger pool of ROR developers from which to choose. And, in many cases, at substantially reduced rates.

Advantages of Outsourcing Development Company:

  • Budget. If you engage an onshore development agency, this may not be the case. Hiring an outsourced Ruby on Rails development business, on the other hand, will almost certainly save you at least half of your development costs. There are several countries where cost and quality are balanced. In Eastern Europe, for example, the typical hourly rate is $25-50. For example, while agencies in the United States charge between $100 and $170 per hour. The hourly charges at Sloboda Studio range from $30 to $45 per hour, depending on the skill.
  • Expertise. The outsourcing firm can give you a large pool of developers. As a result, you can essentially hire Ruby on Rails developers with any skill set you require.
  • Long-term collaboration. As is customary, development firms are interested in taking your product from the concept stage to the market-ready stage. A good company would also provide you with lifetime technical support. As previously stated, such a service is quite unlikely to be obtained from freelance specialists.

The disadvantages of Outsourcing Development Company:

  • There is a lack of live communication. Working with a remote team appears cumbersome because you cannot communicate with them when necessary. Can’t you? You can still discuss your project and manage the working process through regular meetings, video conferences, and messaging. Thinking broadly, the absence of live interactions does not preclude the development of good communication.
  • It’s difficult to locate trustworthy developers. On the one hand, Google and Clutch have thousands of companies. However, because you don’t know who to trust, it’s still exceedingly tough to hire Ruby on Rails developers. We’ll provide you some pointers on how to pick the most dependable agency down below.

7. How To Find Remote Ruby on Rails Developers

7.1     Where to Find Developers

Where can I hire ruby on rails programmers? You can always hire Ruby on Rails developers on the internet. There are numerous platforms, services, and businesses available all around the world to assist you.

Here are our suggestions:

  1. Clutch – A leading rating and review site for locating the best development firms You can narrow your search results by niches, technologies, industries, or regions. This platform provides distinct lists for the majority of the conceivable requirements.
  2. StackOverflow – It is essentially a question-and-answer service for developers. Programmers can join a network to discuss a variety of computer programming issues.
  3. OutsourcingVN: This is a reputable organization that offers a number of options for hiring Ruby on Rails programmers. OutsourcingVN has over 9 years of experience providing high-level front-end developer talents to SMEs and large businesses, supporting them in making their ambitions a reality. This will be the good choice for hire Ruby on Rails developers in Vietnam

7.2     What to Pay Attention To

It makes no difference whether you hire Ruby on Rails developers in-house or through a freelancer or agency. But first and foremost, you must verify your expertise.

4 Tips for determining the developers’ expertise:

  • Examine the websites/profiles. First and foremost, review the profiles of freelancers and the websites of agencies. You can find out what services they provide and how much experience they have. And then decide to hire Ruby on Rails developers Obviously, if you require specialized knowledge, you should seek out development firms with a specialist specialization.
  • Examine the portfolios and case studies. The most effective projects will be included in the portfolios of responsible development businesses and freelancers. So they can demonstrate to potential clients that they have sufficient experience. Of course, there is the possibility of an explanation such as “I haven’t finished my portfolio yet.” Alternatively, “our agency is currently developing the case studies.” It’s possible. But don’t take the chance; instead, just go on.
  • Examine the feedback. Successful examples are frequently a source of pride for companies and developers. And, without a doubt, they like sharing these cases on their websites or in their profiles. Many customers are also prepared to provide comments about businesses. If you can’t uncover any successful cases of your potential partner, look for evaluations on Clutch or Google. If you can’t find any, it’s far too dangerous; best to move on. Please notice this when hire Ruby on Rails developers.
  • Interview. Can’t pick between a few good devs or agencies? All of them should be contacted and interviewed. Ask inquiries, talk about your future project, and assess the attitude. Yes, some time would be required. However, you would spend less time doing this than you would if you hire Ruby on Rails developers wrong.

8. Cost Of Hiring Ruby on Rails Developers

Development pricing is complex, to say the least – expensive fees do not always guarantee the best skills. On the contrary, too low growth rates should cause you to be concerned. To be honest, there are no freebies in software development. Let’s have a look at the pricing variables.

8.1     In-House Development Cost

As previously stated, in-house development necessitates the following:

  • To find developers. Prices will vary depending on your location and the development grades necessary.
  • To lease an office space. The cost of rent will vary depending on your country and the location of the building.
  • To pay your taxes. Consider this issue as well if you do not want to violate any labor regulations.

8.2     Costs Of Freelance Development

Freelance development is unquestionably the most cost-effective option. The average cost for freelance development, according to Upwork, ranges between $15 and $50. However, keep in mind that risks are also costly.

8.3     Costs When Using An Outsourced Development Company

These outsourcing costs fall midway between those of an in-house employee and those of a freelancer. You save a lot of money on location, labor, and office space, but you still invest in the dependability and responsibility of your developers when you hire Ruby on Rails developers.

Factors Influencing Pricing In Offshore Development:

  • Expertise. A senior developer’s experience may assure you high-quality development, but you should be prepared to pay more.
  • Location. The cheapest rates are found in Asia, while the highest prices are found in the United States. Focus on Eastern Europe and South America to find a reasonable pricing. Hire Ruby on Rails developers in Vietnam will be the nice choice
  • The project’s intricacy. The more complicated and feature-rich your project is, the longer it will take to build. As a result, you will have to invest more time and money. The development business, on the other hand, will assure you effective results.

9. 20 Ruby on Rails Interview Questions

20-Ruby on-Rails-Interview-Questions

1. What exactly is the distinction between Ruby and Ruby on Rails?

Ruby is a programming language that is interpreted. Ruby on Rails (“RoR”) is a Ruby-based server-side web application framework. Although pure Ruby can be used to construct applications, RoR is far more efficient.

2. What are some Ruby on Rails alternatives?

Meteor and other Node. js-based frameworks allow you to construct JavaScript-based web applications. Django is another popular solution. Python Web Framework is what it’s called.

3. What was the most recent Ruby on Rails project you worked on?

It’s a wide-open question. Pay close attention to the response and try to determine how advanced your prospect is and what kind of experience he or she has. This question can also reveal how passionate the candidate is, because programming is still a job for those who are passionate about their work.

4. What is Ruby on Rails’ limitations?

You need to be careful when hire Ruby on Rails developers. A good developer should be aware of his or her tech stack’s constraints. It’s the same with RoR. Ruby on Rails comes with highly opinionated tools, and while it is simple to create an app using gems and plugins, it takes a significant amount of time and work to create something genuinely original. The biggest constraints of Ruby on Rails stem from how Ruby MRI handles multithreading and how it may affect speed, although in terms of features, there are fewer and fewer things that must be hacked – for example, support for connecting to multiple database servers was recently implemented.

5. What are the benefits of using Ruby on Rails?

There are numerous advantages to using Ruby on Rails and hire Ruby on Rails developers. It is less expensive and more popular as an open-source solution than others. Ruby on Rails continues to try to maintain the edge of its previous iterations by adding new features all the time, but it’s also considerably more mature. The staff behind RoR is seasoned and consistent, which provides the project a lot of stability. The most significant advantage of RoR is the speed with which MVPs may be developed due to built-in answers to common challenges (WYSIWYG forms, mailing, WebSockets, asynchronous tasks, file uploads). In addition, a wealth of gems and plugins are readily accessible to extend RoR features, such as with simple administration panels or user account systems.

These qualities, together with a growing network of specialists, make RoR cost-effective and developer-friendly. Inquiring about the benefits and drawbacks of specific technologies will also help you understand how your prospect views software development in general.

6. What are the most common RoR Software design patterns?

There are numerous design patterns that improve software development efficiency. Service Objects, View Objects, Query Objects, Decorators, Form Objects, Value Objects, Policy Objects, Observer pattern, and Singleton pattern are among the most common in RoR development.

7. What exactly are Ruby gems?

They are Ruby libraries that improve web application development capabilities. In Ruby on Rails development, there is a gem for almost everything.

8. In Ruby, what is the difference between a gem and a plugin?

On a machine, you install a gem. It is accessible to all Ruby programs that are executing on that computer. In a folder, a plugin is installed for a specific program. It can only be used by that specific program.

9. What Ruby on Rails gems are you familiar with and have you used?

This open-ended question is useful since it allows your candidate to demonstrate their expertise with the tech stack as well as their personal approach to Ruby on Rails development. Devise for user registration/login, Rubocop for code linting, and RSpec for unit testing are among the most popular gems.

10. What is the distinction between a Symbol and a String?

Both strings and symbols are character sequences, but each string is its own object in memory (even if they contain the same sequence of characters), whereas symbols with the same name are always the same object. Strings are thus malleable, whereas symbols are not. There is a subset of methods that are exclusively available for strings, although utilizing symbols whenever possible is highly encouraged due to less memory effect and faster performance.

11. What exactly is the DRY code? (Don’t Repeat Yourself.)

When you hire Ruby on Rails developers, make sure they can answer this question. The basic rule in Ruby on Rails development is to keep the code as DRY as possible. It signifies “Don’t Repetition Yourself.” It makes the code shorter. Every piece of application logic that does a certain thing should occur in code just once, so that you don’t have to alter code in several places to change a given behavior. WET is the inverse of DRY – Write Everything Twice. It asserts that refactoring code is only reasonable when there are at least three repetitions of the same logic in the source.

12. Is it possible to use constructors in Ruby? How are they announced?

Ruby does, in fact, support constructors. They are declared using the method “initialize” and the def keyword.

13. What are the most typical Rails mistakes that cause page load times to increase?

  • There are no indexes on columns in the database, therefore queries take longer to execute.
  • Unnecessary eager loading results in an excessive number of queries being made to a database;
  • Using too many gems, which causes Rails processes to become too large and has an impact on performance;
  • Obese Model in MVC – it may result in methods that are superfluous or irrelevant.
  • Setting the read timeout to a too long number;

14. What exactly is a module?

It is made up of methods, constants, and class variables. Such a collection is a distinct entity with its own name. A module is defined in the same way that a class is, but using a module keyword instead of a class keyword. It is simple to avoid collisions with existing classes, methods, and constants when using modules.

15. Which deployment tool do you employ? What other people do you know?

The way your prospect responds to this question will reveal how comfortable they are with high-quality tools. Another consideration is whether they are familiar with and have used the tools employed in your firm. The most popular will be CI/CD solutions such as Jenkins or GitLab CI, although Capistrano may also be a viable option. This question also reveals how important a candidate considers deployment automation, which is one of the most important aspects of working in an Agile setting. A good ruby on rails programmer needs to answer this question.

16. How does caching work in Rails?

There are several out-of-the-box caching options in Ruby on Rails. The most prevalent are fragment caching, page caching, and action caching. Another option is to nest the cached content within other items (also known as Russian doll caching).

17. What exactly is ActiveJob?

Active Job is a framework that allows you to declare jobs that run in parallel with the main request-response application cycle. When you write jobs to Active Job, you don’t have to worry about API variations across job runners since Active Job acts as a layer between the job specification and the job runner.

18. What exactly is an Active Record in Ruby on Rails?

It is a framework for ORM. The ORM framework is a layer that is in charge of representing business data and logic. It ensures that the relationships between objects in a database are preserved. Furthermore, Active Record eliminates the requirement to utilize pure SQL to search and query a database.

19. What ActiveRecord relations are available?

ActiveRecord supports three types of relationships: one-to-one, one-to-many, and many-to-many. You specified the relationship by saying: has one, has many, belongs to, or has and belongs to many.

20. What exactly is a Rails engine?

Engines in Rails can be thought of as small applications. A host application will contain the functionality provided by an engine. An application can be thought of as a collection of engines. Most of the time, you won’t need to ask all of these questions. In fact, sometimes just a couple of them will assist you to determine the level of proficiency of the candidate being interviewed. Depending on your needs, you can concentrate on basic or complex Ruby on Rails interview questions.

In conclusion

Every developer is looking for solutions to reduce the amount of effort and time it takes to build a web application, something that can automate the tiresome chores required in the process of establishing a website. Ruby on Rails is the software for doing so. Hire Ruby on Rails developers to help you construct a high-performance team and secure RoR development services at a low cost.

Because Rails is the most manageable framework and Ruby is a succinct language, Ruby on Rails is the best open-source software for building web applications. Furthermore, you are aware that it is built on the MVC framework and has various advantages. All of the information presented here serves as your primary guide and first interaction with Ruby in Rails. You now have all of the information you need to get started with your Ruby on Rails creations or maybe hire Ruby on Rails developers.

Outsourcing Vietnam is one of the leading Software Outsourcing Companies in Vietnam specialized in software development and digital marketing fields. Also, we also provide dedicated software developers for hire services, including Ruby on Rails developers. Contact us here to get a free consultation within 24 hours. We are willing to help.

Related: How To Hire Web Developers in Vietnam

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