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Leroy Merlin helps people all around the world improve their living environment and lifestyle by helping them design the homes of their dreams and make them a reality. The Leroy Merlin mobile app helps customers search for products, shop online and find their nearest store. The Russian branch of Leroy Merlin has stores in 64 cities, and 1.5 million people use the mobile app monthly. Visit the Ko

We continue our series of Kotlin for server-side webinars. Between February 18 and March 18 we will host 4 webinars to explore applied software development with Kotlin on server-side through live-coding sessions. Speakers from JetBrains, VMware, Confluent, and Oracle will cover reactive programming, asynchronous applications with the Ktor framework, building microservices with Helidon, and other a

We have released Preview 2 of Kotlin for Apache Spark. First of all, we’d like to thank the community for providing us with all their feedback and even some pull requests! Now let’s take a look at what we have implemented since Preview 1? Scala 2.11 and Spark 2.4.1+ support The main change in this preview is the introduction of Spark 2.4 and Scala 2.11 support. This means that you can now run jobs

Down Dog is the innovative start up that brings a studio-like yoga experience to your mobile device. With Down Dog you get a brand new yoga routine every time you come to your mat. Unlike following pre-recorded videos, Down Dog won’t make you do the same workout over and over again. With over 60,000 different configurations, Down Dog gives you the power to build a yoga practice you love! This app

We’re planning to add new language features in Kotlin 1.5, and you can already try them out in Kotlin 1.4.30: Stabilization of inline value classes Experimental support for JVM records Experimental support for sealed interfaces and other improvements for sealed classes To try these new features, you need to specify the 1.5 language version. The new release cadence means that Kotlin 1.5 is going

We'll make the new backend Stable soon, so we need each of you to adopt it, let's see how to do it. We have been working to implement a new JVM IR backend as part of our ongoing project to rewrite the whole compiler. This new compiler will boost performance both for Kotlin users and for the Kotlin team itself by providing a versatile infrastructure that makes it easy to add new language features.

Philips is a leading health technology company focused on improving people's health and well-being, and enabling better outcomes across the health continuum – from healthy living and prevention, to diagnosis, treatment and home care. Philips is pursuing the goal of improving 2.5 billion lives per year by 2030. Philips has a wide range of connected products for smart home care and personal health

The Kotlin team has always relied on feedback from the community for making decisions about the future of the technology. You will always be our go-to people who know best how to make Kotlin even more enjoyable to work with! This past November, we conducted our first-ever Kotlin Multiplatform survey with the goal of understanding how the recent changes in the technology have shaped the ways develo

Like most startups, at the beginning of its journey Faire was looking for an efficient solution to base its tech stack on. Here is their story of starting with Java and migrating to Kotlin in a year.

You can understand a lot about data from metrics, checks, and basic statistics. However, as humans, we grasp trends and patterns way quicker when we see them with our own eyes. If there was ever a moment you wished you could easily and quickly visualize your data, and you were not sure how to do it in Kotlin, this post is for you! Today I’d like to talk to you about Lets-Plot for Kotlin, an open-

Expedia adopted Kotlin because of its null-safety compiler guarantees, the conciseness of the language, and its full Java interoperability. Interoperability with Java made a gradual Kotlin integration possible without having to fully rewrite applications.

We’ve changed the release cycle of the Kotlin plugin, so that all major updates are now synced with IntelliJ IDEA releases. In this release: Inline refactoring is now cross-language: you can apply it to any Kotlin elements defined in Java and the conversion will be performed automatically. Now you can search and replace parts of your code based on its structure. Building performant and beautif

We’re revamping our Kotlin documentation to bring you more helpful features and improve your user experience. To name just a few advantages, the new Kotlin documentation: Is mobile friendly. Has a completely new look and improved structure. Provides easy navigation on each page. Lets you share feedback on every page. Lets you copy code with a single click. More features such as dark theme suppor

DoorDash uses Kotlin for all their backend services and infrastructure. Hundreds of engineers work with Kotlin across a massive system spanning multiple repos. Two years ago, they made the bold move to split their existing legacy Python monolith into multiple backend services, which they developed in Kotlin. This upgrade resulted in tremendous improvements: Better software performance. Сleaner c

Kotlin is becoming a language of choice for server-side application development. Null safety, 100% Java interoperability, coroutines, and many other features make Kotlin ideal for backend programming. We’re launching a series of webinars to help you to learn more about backend development with Kotlin or even try it for the first time. In the next few weeks, speakers from JetBrains, Google, and

It is quite common to use existing frameworks and libraries for backend application development. If we look at most of the popular frameworks in the Java ecosystem, many of them actually support Kotlin out of the box. There are a lot of Java libraries too. You can use these frameworks and libraries in your Kotlin programs thanks to Kotlin’s flawless Java interoperability. Kotlin is an excellent

Welcome to Kotlin Heroes 5: ICPC Round!

The Kotlin 1.4 Online Event materials are available for you to watch any time. Recordings of the talks, and Q&As are available on the event web page, along with slides. You can watch the recordings in order using the Kotlin 1.4 Online Event playlist Kotlin 1.4 talks At the time of writing, the recordings from the Kotlin 1.4 playlist have been viewed more than 120 thousand times in total. The

We are happy to share with you the release of version 1.0 of our multiplatform serialization library, kotlinx.serialization. As the first stable version of the library, we can finally consider it production-ready! Whether you are writing Android apps, using Kotlin Multiplatform Mobile, creating server-side services, or building web frontends with Kotlin/JS – kotlinx.serialization comes with a sim

Today, we're excited to announce the public roadmap for Kotlin. This document describes the biggest projects our team is working on right now. It has a 6-month time frame and will be updated every 3 months. Each item on the roadmap represents a project with a linked YouTrack ticket. If you have a question about a specific project, feel free to post it in the corresponding issue. You are also welc