Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?


Failed to load latest commit information.
Latest commit message
Commit time
December 3, 2019 15:54
December 3, 2019 16:17
December 3, 2019 15:54
December 3, 2019 15:54
December 3, 2019 16:17
October 26, 2017 14:37
December 3, 2019 16:17
November 2, 2017 06:12
November 2, 2017 06:12

JetBrains incubator project

KotlinConf App

This is the official KotlinConf App! We hope you enjoy(ed) the conference and sessions. This repository contains the source code of the application.

All pieces of the application are implemented in Kotlin. Backend, frontend and mobile apps are Kotlin applications. Yes, Kotlin is powering all parts of the story. Did I already say that? Okay, let's get to the details:


KotlinConf App is connecting to the server running in the cloud to get information about sessions, speakers, favorites and votes. It is developed using Ktor, an asynchronous Kotlin web framework.

The server polls Sessionize service, which is used for planning the conference. Once in a while, it connects to APIs to get the latest information about sessions, speakers, and timeline. It then augments and republishes this information for clients to consume. It also provides a couple of extra APIs to save your favorites and accumulate votes.

Android Application

As you can imagine, the Android version is developed in Kotlin/JVM. What's interesting here is that this time application utilizes Multiplatform support, which is an experimental feature in Kotlin 1.3.61. Data structures for retrieving data from the backend server and some date-time operations are shared across multiple projects.

iOS Application

User interface of iOS version is written in Swift, all logic and data written in Kotlin in the common module. This way iOS part itself is responsible only for specifying how the application looks like and how it represents changes requested by logic. Kotlin and Swift are highly interoperable, so from Swift, you can easily use all classes and tools defined in the common module.

How to build and run

Building the code

  • Make sure you have the Android SDK installed
  • Open the project in IntelliJ IDEA (2019.3 recommended)
  • Create a file in the root directory of the project, pointing to your Android SDK installation. On Mac OS, the contents should be sdk.dir=/Users/<your username>/Library/Android/sdk. On other OSes, please adjust accordingly.
  • Run ./gradlew build

Running the backend

  • Run ./gradlew backend:run from the command line or from Gradle tool window
  • The backend will start serving on localhost:8080, with data stored in a local H2 database

Running the Android app

  • Create a run configuration of type "Android App"
  • Select module "app" in the run configuration settings
  • Run the configuration
  • Select the emulator or connected device, as normal

Running the iOS

To run iOS version you need to generate fat framework first:

  • For simulator ./gradlew debugFatFramework
  • For device ./gradlew releaseFatFramework

Next you should install all pods with running:

cd iosApp
pod install

Next you can open iosApp/KotlinConf.xcworkspace, select a device XCode and hit run.