Kotlin is an open-source, general-purpose statically typed programming language used for different platforms such as for Android, Java Virtual Machine (JVM), browser. Kotlin is preferred over Java since it is an extension of the latter wherein the developer has to write far less code to execute the same action.

Kotlin involves various functional features such as “Interoperability” with Java, a null safety, a native conversion and provides a much more concise code. These advanced features of this language ensure a more seamless user experience and coding practices.

While Kotlin is similar to Java, it is also a compiled language where you have to compile the code before you can run it. The source code of Kotlin is gathered in a file with the extension .kt.  Developers use Kotlin over Java because it has minimal risk with codes and has more advanced features. With Kotlin, a developer has to write less code which improves the quality of the project.



Difference between Java and Kotlin




Object-oriented programming Not pure OOP Fully OOP
Extension Functions No  Yes
Inline Functions No Yes
NullPointer Exceptions Yes No
Lambda Expression No Yes
Invariant Array No Yes
Non-private Fields Yes No
Singletons Objects Yes Yes
Static Members Yes No


Top Features:

The Kotlin language is

  • Developer friendly
  • Interoperability
  • Fewer buggy codes
  • Android interactivity
  • UI/UX interface
  • No Semicolon Usage
  • Data Binding Library
  • Free from NullPointer Exceptions
  • Open-source language ( Automatic Conversion)

Advantages of becoming a Kotlin developer

The demand for Kotlin developers is very high. Almost every company has recognized that now the clock is moving in favour of the mobile era, and these companies want to thrive with every possible opportunity. Thus the number of jobs, especially for Android app development, IoT space, is fast growing.

The average salary ranges between ₹8 – 10 LPA depending on experience, job skills, and organization.

Skills required:

  • Understanding of OOPs concepts, invariant Array, design patterns, extension functions, design patterns, etc.
  • Knowledge of android features such as APIs, NDK, Android studio, Flutter.
  • Basic understanding of web services, XML files, JSON and other tools.
  • Knowledge of multithreading, automated testing, Navigation components, Data binding library, Cloud functions.
  • Proficient in data structure and algorithms.

Popular Kotlin Courses 

Here, is the list of best learning and certification courses:


What to include on a Kotlin Developer Resume

For getting good opportunities you should have a thorough mobile app development background. Ideally, you should include the links of the applications you have created on Google play. Understanding and showcasing of great UI/UX best practices will help you get recognized by top product companies. 


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