©2019 by CoffeeJug



From the makers of JavaDay Lviv

The monthly meetups for Java professionals who would like to be interactive and allow technology enthusiasts to learn from other professionals, have questions answered in real-time, discover new tech and solutions.


Meetup Schedule



Attendance is free (Pre-order and get your free ticket HERE)

Reactive for the Impatient (A Gentle Intro)


This talk presents to the audience a few of the major Java-based reactive frameworks and toolkits in the market today, such as RxJava, Spring Reactor, Akka, and Vert,x. It will start by going over the basic tenets of reactive systems, and some examples of the problems that these systems aim to solve. It will discuss the 2 most commonly used Java frameworks for implementing reactive coding - RxJava and Spring Reactor, and will show some code samples.

Coffee Break


Teach Your Pacman to play with ML and Reactive Streams


Today the adoption of Machine Learning is enormous. We use it almost everywhere: on clusters, on our phones, on hand watches and even on the teapots. But, who knows how challenging could be the development of the continuously improved (or even real-time) machine learning. Servers' capacity, stability, performance, along with a proper ML algorithm selection and many other properties must be taken into account. In this presentation, we will be demonstrating bots education for multiplayer Pacman game.


Our last Speakers

Sebastian Daschner

Lead Java Developer Advocate @ IBM

Serge Bishyr

Software Engineer 
@ Lohika

Piotr Przybył

Remote Freelance Software Gardener

Become a speaker: Apply for the future meetup



Andriy Rymar

Software Engineer
CoffeeJug founder
​JavaDay Lviv organizer

JUG UA active member

Ira Tkach

Event Manager

Ihor Banadiga

Software Engineer
​CoffeeJug founder
​JavaDay Lviv organizer

JUG UA active member



Become a Partner: Apply for the future meetups

Innovate Java Conference

IT Consulting & Software Development

Developer Tools for Professionals and Teams


Info partners

Innovate Java Conference

IT Consulting & Software Development

Java User Group of Ukraine

Developer Tools for Professionals and Teams



Please do not ignore Code of Conduct to create a comfortable atmosphere for all participants.