Kotlin: Mobile app development made faster and safer

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Kotlin is a powerful and concise programming language that’s statically-typed and open-source. Kotlin developers can use this object-oriented business tool to build easily maintainable mobile and web applications for Android, iOS, JVM, and native.

Support modern programming concepts with Kotlin

Boost productivity, developer satisfaction, and safety using Kotlin code

  • Increased team efficiency. Clear and compact, Kotlin improves productivity with its succinct and intuitive syntax
  • Compatibility with company's codebase. A 100% Java-interoperable language, Kotlin is consistent with Java and all related tools
  • Easy to maintain. A concise language that’s supported by IDEs and protected against null errors
  • Stable and secure. Designed to be fail-fast, Kotlin produces safe, expressive, and reliable code

An enterprise mobile app using high-performance Kotlin code and beacon technology

Building a native Android app to provide employees with crucial workspace informatio.

Netguru used Kotlin programming language to develop an Android app for a retail company. They helped the organization overcome organizational and logistical obstacles using Kotlin.

The mobile app helped employees navigate their new office space, boosting productivity and enhancing collaboration.

Enterprise app for productivity management
  • We’ve had a long-term relationship with Netguru. Netguru is a great and super-professional service provider, which brought new technologies, new methodology, and a fresh perspective to our project.

    Assaf Davidi

    VP Product at temi

A universal coding tool that enhances productivity

Interoperable with Java, the Kotlin programming language is multiplatform

  • Android apps. Kotlin is a first-class language with safety mechanisms, supported on Android
  • Migration to Kotlin. Kotlin code is interoperable with Java, so there’s no need to migrate everything at once
  • Cross-platform development. Kotlin Multiplatform extracts a common codebase to share code between mobile platforms
  • Web development. Supports JVM development, facilitating back end web development and front end applications

Why use Kotlin?


Kotlin is a cross-platform, statically-typed, open-source programming language that runs on the Java virtual machine (JVM). Developed by JetBrains, the project started in 2010, with the first official release in February 2016.

Code written using Kotlin works as well with Java as it does natively, meaning it’s interoperable. Kotlin uses aggressive inference to determine values and expressions.

Kotlin is concise, type-safe, and reliable. It has both object-oriented and functional constructs and is usable for any kind of development. That includes server-side, client-side web, Android, and iOS. It’s also supported by all major Java integrated development environments (IDEs), including IntelliJ IDEA, Android Studio, Eclipse, and NetBeans. Support like that helps increase developers’ productivity.

Additional Kotlin language features include clean and compact syntax and null safety. That translates to mobile apps that are easier and cheaper to maintain, and more efficient teams.

Kotlin for business software development

Being 100% compatible with the JVM, you can use Kotlin for server-side development. Write expressive yet concise code while maintaining full compatibility with Java.

Kotlin is compatible with all Java libraries and frameworks, the JVM, and can integrate with the Gradle and Maven build systems.

As well as using for back end web, you can use Kotlin code client-side, for desktop development, and native development. It also supports modern programming concepts like extension functions, higher-order functions, and lambdas.

What’s more, adopting Kotlin doesn't cost anything, except for learning and training. Switching to Kotlin is easy: install the plugin, add it to your build files, and click convert.

Advantages of Kotlin for Android development

In 2017, Google made Kotlin a first-class language for writing Android applications. That opened up opportunities for Android developers, helping them solve common headaches like runtime exceptions and source code verbosity. Applications such as Basecamp and Pinterest use Kotlin for Android.

It’s easy to get started with Kotlin, and you can write new modules in Kotlin and be sure they’ll work alongside Java code. That means you can gradually introduce it into existing projects. Furthermore, there’s preservation of skills and technology investments.

Kotlin is a concise and powerful language. It reduces the amount of boilerplate code required, enhancing productivity. There’s less room for error, meaning safer, more reliable code. There’s also built-in safety support.

The more you can enhance Android app stability by removing bugs and minimizing crashes, the better the user experience (UX) is.

Hire top Kotlin app developers

Kotlin developers at Netguru are on hand to share their knowledge and expertise. Our skilled team is ready to advise you on the important aspects to consider when choosing Kotlin technology for your next application.

There are many advantages to this powerful and concise modern programming language. Already considered a mature ecosystem, Kotlin’s popularity is growing rapidly, especially within the mobile development scene.

Our expert team make business visions a reality

A 600+ team of specialists creating custom solutions for Android and iOS, increasing efficiency. Talented developers fusing technical and business skills, bringing first-rate products to the market.

A premium yet affordable personal robot made possible by mobile app development

Say hello to Temi: a cutting-edge robotic personal assistant combining sight, touch, and hearing.

Harnessing advanced AI technology, elegantly-designed Temi makes life easier by helping with daily tasks. Built from scratch, Netguru assisted with Temi’s native development on three platforms: the robot’s Android-based operating system, an iOS app, and an Android app.

With one million lines of code, the project was three years in the making. Netguru supported the Temi team with Android and iOS software skills and introduced them to their agile culture.

Read Case Study
temi robot with Kotlin

Developing innovative AI-driven mobile apps and platforms for Keller Williams

Netguru helped redesign KW’s major AI-powered apps and contributed significant software expertise.

Keller Williams is a cutting-edge real estate franchise on a digital transformation journey. The company invested heavily in its own software, the cloud, and AI, leveraging their data to boost AI-powered technology.

Netguru contributed to the digital transformation of KW by assisintg with the redesign of Kelle, an AI-powered personal assistance mobile app. Netguru also helped improve all-in-one real estate tool Command, and helped build an entirely new design system from scratch.

Read Case Study
Keller Williams mobile app-1

A unique well-being app that won App Store’s best of 2020 and 2018

Helpling self-care company Shine build a more compassionate world with a mobile app.

Netguru helped Shine make mental self-care easy and accessible by developing their mobile app. As time went by, Netguru also became a trusted partner, shaping Shine’s product strategy.

The high-performance well-being app has users from 189 countries and won the 2019 Google Play Award in the Standout Well-Being App category. The app has an average 4.7 rating in the App Store, and 96% of members say Shine helps them feel more self-compassionate.

Read Case Study
shine mobile app

Trust is the foundation of great products

  • Netguru make you feel an integral part of the development team. Some agencies build walls between the client and their team, and disappear for weeks without any contact. Netguru offered constant communication, which was very reassuring.
    Ruairí Doyle

    Ruairí Doyle

    Head of Product at Apps for Good
  • Working with Netguru's processes has been interesting. I particularly like the organization of daily Slack communications, weekly calls, and project management in Jira, where I could see bugs, sprints, and what tasks were pushed to next week.
    Steve Dailey

    Steve Dailey

    Co-ounder of Helpr
  • Netguru is an important part of our ability to maintain fast growth. They add value in project management, QA and infrastructure support, on top of a fantastic set of talented engineers working as part of our team every day.
    Kevin Dykes

    Kevin Dykes

    Senior UICo-Founder and CEO at RetentionGrid Engineer at Netflix

  • 15+

    Years on the market
  • 400+

    People on Board
  • 2500+

    Projects Delivered
  • 73

    Our Current NPS Score

Delivered by Netguru

We are actively boosting our international footprint across various industries such as banking, healthcare, real estate, e-commerce, travel, and more. We deliver products to such brands as solarisBank, PAYBACK, DAMAC, Volkswagen, Babbel, Santander, Keller Williams, and Hive.
  • $47M

    Granted in funding. Lead generation tool that helps travelers to make bookings
  • $20M

    Granted in funding. Data-driven SME lending platform provider
  • $28M

    Granted in funding. Investment platform that enable to invest in private equity funds
  • $5M

    Granted in funding. Self-care mobile app that lets users practice gratitude

Frequently asked questions

Common queries about Kotlin, the open-source programming language

Is Kotlin Better Than Java?

Kotlin has a lot of traction in Android development and compiles to almost every platform. It’s more concise and expressive than Java and switching is easy. There’s built-in null safety support, but Kotlin does come with a steep learning curve and has a smaller developer community.

Java is easy to learn, flexible, and has an open-source ecosystem. Java apps are compact and are easy to optimize. However, Java is a verbose language that requires more code, and with that comes a higher error risk.

What is Kotlin written in?

Current versions of Kotlin are written in Kotlin.

Kotlin is also 100% interoperable with Java, and there’s major emphasis on making sure existing codebases can interact properly with Kotlin. You can easily call Kotlin code from Java and Java code from Kotlin.

What is kotlin good for?

Kotlin is usable for any kind of development work. That includes client-side, server-side, web, and Android. There’s also support for other platforms such as iOS. Kotlin is good for mobile and server-side applications, client-side with JavaScript or JavaFX, and data science.

Thanks to Kotlin’s scripting capabilities, you can use it directly in your Gradle build scripts. Kotlin also supports modern programming concepts like extension functions, higher-order functions, and delegates.

Why is Kotlin in high demand?

Kotlin is in high demand because it is a modern, concise, and powerful language that makes development more enjoyable.

Kotlin has quickly become the most popular programming language on Stack Overflow, and it's currently being used by companies such as Square, Pinterest, and Uber.

Additionally, Android Studio includes full support for Kotlin development, which means that Android developers can now use Kotlin to write their apps.

As Kotlin becomes more popular, we're likely to see even more companies begin using it in their projects. So if you're looking for a solution for your software project, learning Kotlin would be a wise decision.

What can you build with Kotlin?

You can build Android apps, server-side applications, and client-side web applications with Kotlin. It's also possible to use Kotlin for desktop applications and UWP apps.

Kotlin is a Java Virtual Machine (JVM) language that interoperates well with Java. That means you can use Java libraries in Kotlin projects and vice versa. Additionally, the Kotlin compiler produces a bytecode that is compatible with the JVM. This makes it easy to use Kotlin in existing Java projects.

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