Kotlin Talk with Frederik Dumazy

For the first time we plan a Meetup in another city than Brussels. This time we take our Kotlin User Group on the road to Bruges.

Frederik Dumazy welcomes us @Duo.

Kotlin meetup with Christophe Beyls

This meetup we have Christophe Beyls (https://medium.com/@BladeCoder) who will be giving a talk.

Exploring Kotlin’s hidden costs 

We’ll study the bytecode generated by the Kotlin compiler in various scenarios in order to find out which code constructs come with hidden performance penalties and learn how to become better Kotlin programmers. This talk will be based on my series of blog posts about this topic and will extend it in some areas.

Drinks and some food will be provided, so please update you’re RSVP if you can not make it. Thanks!

Kotlin Crash Course (sign up on EventBrite, link in description)

We are happy to invite you to the first Kotlin crash course in Brussels organised by the BelKUG and GDG. For a whole day, you’ll be able to learn / improve your Kotlin skills surrounded by a whole group of enthusiasts.

This course will cover an introduction to Kotlin and after the course you’ll be able to start working with the language and start adding it to your own codebases. If you already know the language, we’ll also offer exciting and challenging content for you which will help improve your skills.

How do I sign up?:

There are only 40 places available for the course, if you are interested in attending please sign up via Eventbrite:



10:00 – Open doors

10:30 – 10 min welcome and explanation presentation

10:40 – Split into groups and start of the basis / advanced theory

13:30 – Lunch break

14:30 – Codelabs

16:00 – Coffee break

19:00 – End of codelabs

Cost: The cost of the course is 10 EUR that will be paid upon arrival at the venue. Food will be provided and drinks will be available at 1 EUR, you are of course more than welcome to bring your own drinks!


You should have a basic knowledge of general programming to understand concepts like classes, objects, functions, variables, loops, and so on.

You will need to bring your laptop and charger, and to gain some time make sure you have Android Studio or IntelliJ IDEA installed (make sure the kotlin plugin is already installed) before you arrive.

Hope to see you all there.

Guy and David

Kotlin Night in Brussels

We will host the first Kotlin Night in Brussels on September 29th.

Drinks and food will be provided. 

18:30 Welcome and registration

19:00 Simon Vergauwen (BEL)
Kotlin brings functional programming paradigms to the table. A type safe design can do miracles for your codebase so let’s take a look how we can model runtime errors in our type system and what advantages FP concepts offer.

19:45 Filip Maelbrancke (BEL)
Spring 5 and Kotlin for function(ing/al) web applications With Spring 5 slated for a release on September 28, and Spring 5 now having dedicated Kotlin support, let’s have a look into the features that are designed to make these technologies work seamless together.

20:45 Lukas Lechner (AU)
How “Effective Java” may have influenced the design of Kotlin

You can park your car on the VRT visitor parking (located to the right of the entrance): https://www.vrt.be/nl/contact/routebeschrijving/After reporting to reception/security, you go to the main VRT entrance (walk besides the VRT tower, the main building is located to the left).Once inside the building, you pass the glass doors, and go straight-ahead till the VRT shop. On your left you’ll find elevators, where you go to the 9th floor, and see the session’s room (Perszaal) in front of you.

Meeting #2

18:30 Welcome, networking with finger food and drinks
19:00 Kotlin in Android
20:30 Announcement Next meetup
20:45 T-Shirt bingo

If anyone wants to give a talk please send a PM.

The Kotlin 1.1 Event

The purpose of this event is to gather the preferences and needs for language features from the community.  You can have your say on features you want to see the most in some future versions of Kotlin. Please note it’s more likely that you won’t see those features in v1.2, but we will take your opinion into account when prioritizing our work.

• 7pm CET – Andrey Breslav’s demo presentation (30 minutes, live stream on YouTube).

• 7.30pm CET – 30 minutes break. During the break you can have your say on features you want the most in some future versions of Kotlin.

• 8.00pm CET – Interactive Q&A session with the Kotlin team.  (45 minutes, live stream)

Kick-off Meeting

• 19:00 Registration & Welcome

• 19:30 Intro

• 20:00 Simon Vergauwen BDD Testing with SPEK

• 20:30 Q&A