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Hire Kotlin Developers Effectively in 2024

Kotlin is a general-purpose, statically typed, free, and open-source programming language created to streamline the process of creating apps. Kotlin was initially designed for the Java Virtual Machine (JVM) as well as Android

The Kotlin programming language focuses on safety, interoperability with Java, tool support, and clarity. It frequently coexists with the programming language and was initially created to enhance Java's performance.

Many businesses that specialize in the development of mobile apps choose to employ Kotlin developers. It isn’t enough to want these developers to handle your project; it is important to know how to hire them effectively.

What to look for when hiring Kotlin developers

Hiring Kotlin developers might seem easy, but in order to hire dedicated Kotlin developers who would bring value to you and your company, there are certain things you must look out for. 

Technical skills

Kotlin app developers must have expert knowledge and skill in both Kotlin and Java. They must have real-time experience in software development, Android app development, and app design. They must have expertise in object-oriented and functional programming paradigms.

A Kotlin developer must also be familiar with web frameworks like GWT, be familiar with Android Studio, and the Android SDK, and be proficient in Kotlin and Java programming languages. 

Communication skills

Apart from possessing the right technical skills, Kotlin programmers must also possess good communication skills in order to have a seamless and professional relationship with whoever they work with.

When hiring a Kotlin developer, ensure they have the right communication skills- both listening and speaking. Communicating certain terms and requirements to other team members would require someone who knows how to talk to others respectfully and professionally. 

Developers with Soft Skills

Beyond having the right technical skills and communication skills, a Kotlin developer must have the right soft skills in order to relate properly with team members and interdisciplinary teams within the company. 

When hiring a Kotlin developer, ensure that they are proficient in various soft skills, like team management, time management, decision-making, and critical thinking. They must possess leadership skills as well as adaptability and creativity. 

Developers with Experience

When hiring Kotlin developers, it is important to focus on the professional experience that they have gathered. In order to effectively hire the right developer, they must have garnered vast experience, which is needed to excel at the position that you are hiring them for. 

Expert developers must have vast experience, and some essentials to look for when hiring Kotlin developers effectively are experience with Android app development, practical knowledge of software development, app design, SQL, XML, and Android APIs.

Understanding of XML and RESTful APIs

Kotlin developers need to have a solid understanding of MVC frameworks like Spring/Play, REST/RESTful web services, HTTP protocols, JSON, XML, and protocol buffers in order to deal with third-party integrations and connect the app with backend services

Top 5 Kotlin Developer Interview Questions

Conducting interviews is a way to gauge the experience and knowledge level of your prospective employees and is also a crucial step in the hiring process.The interview questions below are perfect to help you filter the best developers and are also suitable to ask both beginner and experienced Kotlin developers. 

What is the entry point of a Kotlin program?

In every Kotlin program, the entry point is the main function. In Kotlin, there is the option to omit the main function from the class. The JVM implicitly encapsulates it in a class upon compilation. The command line arguments are retrieved using the strings given in the form of an Array<String>.

What do you know about the Kotlin backing field?

A backing field is one that is automatically generated for a property if it uses the default implementation of at least one accessor or if the field identifier inside a custom accessor is referenced.

A backing field is an automatically generated field that is specific to a property and can only be used inside accessors (getter or setter). The backing field is utilized to stop an accessor from making a recursive call that might result in a StackOverflowError.

Kotlin classes are not permitted to use fields. However, when using custom accessors, a backing field is occasionally required. With the help of the field identifier, one can access Kotlin's automatic backup field for these purposes.

What is the difference between async/await and launch/join in Kotlin?


Await is used on the result, which is represented by an instance of deferred, while Async is used to begin or start a coroutine that determines a result. Uncaught exceptions are retained by async code in the resulting deferred and are not further propagated. Prior to execution, they are processed.


To fire and forget the coroutine, the Launch command is used. It is similar to starting a new thread. An uncaught exception in a thread, which is often written to stderr in backend JVM programs and can lead to the crash of Android applications, occurs if the thread inside the Launch throws an exception. 

When a coroutine is launched or initiated, Join is used to wait for it to finish running so that it does not spread its exception. 

What is null safety in Kotlin?

Kotlin's Null Safety feature aims to completely remove the possibility of a real-time NullPointerException. Null reference danger is eliminated from the code using the Kotlin null safety technique. If any null argument is given, the Kotlin compiler immediately throws a NullPointerException without executing any more instructions. The type system of Kotlin is designed to remove NullPointerException from the code.

In the context of Kotlin, what is the suspend function?

Suspend is a function that can be stopped and started while coding. A coroutine is suspended using this function for a predetermined amount of time without causing thread blocking, and it is then resumed. 

Common questions about hiring Kotlin developers

Numerous well-known companies utilize Kotlin on a global scale. Kotlin is used by Uber to create internal tools; Pinterest has incorporated it into their app; and Amazon Web Services' cloud platform was created using Kotlin. 

Some other notable companies that use Kotlin include Netlfix

Kotlin is a popular choice when you think of Android development and has a wide variety of features, which makes it an ideal choice. Kotlin is the best option at the moment for Android development. 

Although many top businesses and developers are adopting and using this language, making it a preferred substitute to Java, Java is still a fantastic programming language for Android development as well as other projects.

 However, Kotlin cannot and isn’t replacing Java, which is a programming language used for more than just Android development. 

Just as Kotlin has numerous advantages, it also has disadvantages. Given that Kotlin is not as developed as the Java programming language, there may be many bugs, and if you encounter any particularly rare ones, you may find yourself stuck for some time. 

Another drawback is that the Kotlin programming language is slow when it comes to developing robust Android apps, despite being quick in many situations. Learning the programming language may be difficult due to a lack of suitable learning resources. 

Kotlin is the best option at the moment for Android development. Although many top businesses and developers are adopting and using this language, making it a preferred substitute to Java, Java is still a fantastic programming language for Android development as well as other projects.

Indeed, there is a demand for Kotlin developers. Over the past five years, Kotlin has grown to be among the most widely used programming languages. According to a 2019 Google statement, Kotlin would take precedence in all future Android development. The most popular mobile operating system right now is Android.

Due to its popularity among developers and status as Google's preferred language, Kotlin has gradually risen to the top of the list for creating Android and mobile apps.

A Kotlin developer is responsible for a variety of tasks. Writing code for applications, testing your designs, debugging the code, collaborating with the design and test teams to create high-performance apps, and utilizing APIs and data sources according to the specifications are some of them.
Yes, there is a future for Kotlin. Many developers are beginning to adopt and use the programming language, especially with Google becoming Kotlin-oriented. Many apps are being rewritten in Kotlin, and this means that there is a future for Kotlin.
A potential employee's behavior in the past and under different conditions are both assessed using behavioral interview questions. Some behavioral questions to ask a Kotlin developer include Describe the most recent project you were involved with, What project are you most proud of? Tell us about a time you found it really difficult to debug an applicCoursera, Trello, Basecamp, Quizlet, and Gradle.ation.
The industry that primarily uses Kotlin is the information technology and services industry, and the companies that use Kotlin are mostly in the United States. Computer software, financial services, higher education, retail, marketing and advertising, telecommunications, and banking are some additional industries that use Kotlin. 

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Kotlin developers for hire, and more!

Whether you're looking to hire Kotlin developers today, or developers tomorrow, we have you covered. developers in our network have experience across hundreds of technologies.

Isabelle O. Mobile Developer

Versatile Kotlin Developer, harnessing the language's concise syntax and expressive features. Building modern Android applications with elegance and efficiency.

Fabio L. Mobile Developer

Goal-oriented Kotlin Engineer, proficient in developing cross-platform solutions with Kotlin Multiplatform. Leveraging Kotlin's interoperability to streamline development workflows. Creating cutting-edge apps.

Luíza F. Back End Developer

Adaptable Kotlin Programmer, exploring the language's potential for backend and web development. Crafting scalable and maintainable code with Kotlin's robustness.

Fabio L. Mobile Developer

Driven Kotlin Developer, with a passion for functional programming and coroutines. Building robust and responsive Android apps with Kotlin's modern toolkit.

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