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Kotlin is a statically-typed, open source programming language on the JVM used for building modern multi-platform applications.

What is Kotlin?

Kotlin is a statically-typed, open source programming language on the JVM used for building modern multi-platform applications developed by JetBrains.

47 Degrees provides

Why use Kotlin?

Kotlin has quickly become a major player in the Functional Programming arena for its streamlined features, ease of compatibility and versatility, as well as official support by Google for Android development. Here are just a few reasons why Kotlin is winning over developers and businesses alike:

  • Concise

    Simple and concise code with less boilerplate. Write safe, reliable code easily so you can focus your attention on what matters.

  • Interoperability

    Full interoperability with both Java and Android meaning you can use any libraries on the JVM.

  • Safe

    Null safety features mean your code won’t compile until it’s fit for compiling.

  • Multi-faceted

    Kotlin integrates with a long stream of existing tools including, easily build from the command line, or from any Java IDE.

Kotlin is a relatively new language but is already proving it’s worth its weight in gold.


Open Source Projects in Kotlin:


47 Degrees is also a sponsored contributor and maintainer of Arrow, an open source library serving as a functional companion to Kotlin's standard library.

In an attempt to make the library, as well as the concepts, easier to understand, our team also produces and hosts a weekly web series entitled, Functional Programming in Kotlin with Arrow.


  • Angie's List Case Study

    The Engineering team at Angie’s List knew that they needed to transition their site to a more modern, flexible and performance-based framework like Scala. Their rapid growth was not compatible with the current .Net legacy stack and they were finding the infrastructure to be inflexible, slow, and lacking the usability they required to move forward. When they needed specific expertise from highly experienced Scala developers for the transition, the team turned to 47 Degrees.

    View the Case Study
  • Mark Brewer

    Increasingly, organizations demand web applications that are resilient, interactive, scalable and even-driven to meet end user expectations. Reactive applications like these require sophisticated tools and middleware to build, deploy and manage them. The team at 47 Degrees has demonstrated impressive creativity and vision in this new space of reactive applications and we’re thrilled to have a working partnership as they continue to help build forward thinking web and mobile applications with Scala, Play Framework and Akka.

    • - Mark Brewer
    • CEO, Lightbend

Ready to hear why Kotlin's the next big thing?

If you're interested in hearing more about Kotlin and why it might be a good fit for your project, get in touch with us today.