Jakub Kubrynski | Devoxx

Jakub Kubrynski
Jakub Kubrynski Twitter

From Devskiller

Jakub is a software developer for whom coding is a way of life as well as a hobby.

He is focused on continuously improving software delivery processes by introducing new technologies and refining Lean methodologies.

For over 12 years of his professional career, he worked as a software developer, architect, team leader, and manager. He gained experience working on both sides of the delivery process, as a vendor and as a client. Today, he is a speaker, trainer, and co-founder of the online technical assessment platform, Devskiller.

Blog: www.devskiller.com

archi Architecture & Security

Microservices - the naked truth of the maintainability


It's easy to do a proof-of-concept but hard to make something "production-ready". Maintainability is complex in distributed systems, and become extremely complicated in the microservices. In this talk, we'll take a look at the common traps producing a gap between "should work" and "works." We'll also talk about costs which come with the most famous (at least at the conferences) architecture.

java Java Language

JPA beyond copy-paste


JPA is the main building block in most Java projects. However, a lot of developers still use it without a deep understanding of the technology, relying mainly on applying the copy-paste methodology from StackOverflow or existing system entities. During this presentation, I will consolidate knowledge about object-relational mapping. We'll see how lazy loading works under the hood and understand the difference between a set, list or bag. We will also talk about common traps leading to significant decreases in performance or improper behavior of the system.