GitPedia

Ktor arrow example

Real World implementation - "The mother of all demo apps". Written in Kotlin, with Ktor, Arrow, SqlDelight, KotlinX Serialization, etc.

From nomisRev·Updated June 26, 2026·View on GitHub·

> While most "todo" demos provide an excellent cursory glance at a framework's capabilities, they typically don't convey > the knowledge & perspective required to actually build real applications with it. The project is written primarily in Kotlin, distributed under the Apache License 2.0 license, first published in 2021. Key topics include: arrow-kt, hacktoberfest, kotest, kotlin, kotlinx-coroutines.

Ktor Arrow Real World Example

While most "todo" demos provide an excellent cursory glance at a framework's capabilities, they typically don't convey
the knowledge & perspective required to actually build real applications with it.

Read
the full blog post announcing RealWorld on Medium.

Over 100 implementations have been created using various languages, libraries, and frameworks.

Explore them on CodebaseShow.

In order for Real World back-end and front-end examples to be able to work together we need to follow a
predefined openapi.yml.

Looking to contribute?

If you're looking to contribute check-out CONTRIBUTING.MD.
Also, this project participates in hacktoberfest!

I will provide personal guidance, and support to everyone that is interested in learning about Ktor, Arrow and Kotlin by
contributing to this repository!

How it works

This example uses Kotlin with Ktor
and Arrow as the main building blocks.
Other technologies used:

Running the project

To run the project, you first need to start the environment.
This can be done with docker-compose up,
and then you can start the Ktor server with ./gradlew run.

shell
docker-compose up ./gradlew run curl -i 0.0.0.0:8080/readiness

Beware that ./gradlew run doesn't properly run JVM Shutdown hooks, and the port remains bound.

Contributors

Showing top 12 contributors by commit count.

View all contributors on GitHub →

This article is auto-generated from nomisRev/ktor-arrow-example via the GitHub API.Last fetched: 6/29/2026