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Kotlin Crew.

Join the Kotlin Community for exclusive insights from people using Kotlin everyday

Welcome to Kotlin Crew, the fastest-growing Kotlin community! Our goal is to establish a vibrant and inclusive place for Kotlin enthusiasts to network, exchange knowledge, and learn.

Our community is where Kotlin developers of all levels can  share ideas, ask questions, and find new opportunities.

If you are looking for real-life Kotlin use-cases, insights about language features, and integrations with other technologies – take your seat because you are in the right place.



Join the ever-expanding community of actual Kotlin users who put the programming language to work in the real world, in both the backend and the frontend of their applications.

Get to know individuals and teams who are using Kotlin as a programming language and pick their brains if you need some insights or advice.


Find out who made it in the big business, which tech giants’ products are based on Kotlin and why does it make them so successful. Do you want to build the next Amazon, Twitter or Netflix? Get inspired on how to turn an idea into the next big thing using one of the most.

Kotlin Crew is where tech enthusiasts, entrepreneurs and developers share the news and most exciting success stories backed by Kotlin programming.


No matter if you are looking for language features and best practices, Kotlin performance optimization methods, or trying to trouble-shoot – Kotlin Crew is here to save the day!

The Members of our Kotlin community are here to share their knowledge with everybody who wants to join the world of software development and explore it through a programming language that is concise, cross-platform and fun.

Dedicated backend development teams

How to get involved?

Follow Kotlin Crew social media profiles and get in touch with other members via our KOTLIN CREW Linkedin group.

Kotlin Crew Community Talks.

Discussions with people who actually use Kotlin to build their next big thing.

in the upcoming edition of DAC10.

We’d like to highlight 10 companies that have built their solution using Kotlin programming language in their backend and have contributed to the increasing popularity of this technology.

Our goal is to highlight companies whose solutions are innovative, perform well, and stand out in the market. See why it’s worth your time and submit your application today.

Benefits of Kotlin in the back end

Kotlin-related articles:

Simplify Your Testing with EasyRandom

EasyRandom is a Java library that allows developers to easily generate random objects, which can be useful for testing, prototyping, and data seeding. It is a powerful tool that can save time and effort when working with object-oriented programming languages like Java.

Using the Inbuilt HTTP Client in IntelliJ IDEA

If you’re developing web applications, an HTTP client is one of the essential tools you’ll need. This tool allows you to send HTTP requests and receive responses from a web server. One of the best HTTP clients available is the one built into IntelliJ IDEA. However, it’s important to note that this tool is only available in the paid version of IntelliJ IDEA.

Updating arrays in MongoDB, what could go wrong?

I could write the introduction to this article presenting MongoDB — what it is and what its features are. Still, if you have stumbled upon this article, you probably already know all of this, and if you don’t, then go and search the web for one of many articles describing MongoDB, it’s been done so many times that it makes no point for me to do this again, so let’s get straight to the point.

Netflix on Java: How to build a 1TB Non-Heap, ultra-efficient application for video streaming — an example

We all know that Java JVM automatically allocates and cleans the application memory. The well-known Garbage Collector mechanism is responsible for all of it. As a result, a programmer doesn’t even have to be familiar with the mechanisms of operational memory usage.

Kotlin & Gradle: a perfect match

It’s not a match because they depend on each other and have no choice. It’s a match because they cooperate and complement each other.

At, we love using Kotlin as a main backend programming language in projects developed for our clients. We find it an elegant, quickly-evolving, type-safe, function and concurrency-focused but still compatible alternative to Java. Having coroutines feature, Arrow-KT library and their limited complexity, it’s easier for us to build performant functional software and to catch most concurrent bugs at compile time.

Scala vs Kotlin: Which one is better for your project

Do you need to choose between Scala and Kotlin? If so, you are not alone. These programming languages have become very popular in recent years, but there can be some confusion as to which one is better for what type of project. We will pick up the fight between Scala vs Kotlin and compare these two languages to help you decide which one is more appropriate for your needs!

Netflix on Java: How to build a 1TB Non-Heap, ultra-efficient application for video streaming — an example

Let’s faced the challenge: write a platform that enables efficient video streaming for many online users. The movie database can contain several hundred items of various sizes, from 0.5 to 2GB each. Total storage is 1TB. Operational memory is not a problem.

Which is better, Kotlin vs. Java? Let’s settle the debate

There is a never-ending debate between Kotlin and Java developers — which is the better programming language? Is one better than the other for certain reasons?

Hiding sensitive data in logs — Kotlin and Exposed framework

We pay special attention to protecting sensitive data in the projects we implement. One place where this data should not go is in application logs.

What is a tech stack? Technology stack in a nutshell

Creating and maintaining the websites and apps was easy because they were all pretty simple. Now things got a bit more complicated though, as often a single application will be made of multiple elements, each requiring different tools or programming language to use.

Sealed classes to rescue the PATCH endpoints in Kotlin


Do you want to contribute?

Write an article, share your knowledge, talk about a case-study or be the guest of an interview. We are open to collaboration with Kotlin geeks who want to spread the word about how they managed to take advantage of the language and what projects they accomplished. Contact us and let’s do it!

    Stay in touch and up-to-date with Kotlin news.