Tech Talks

Upcoming Events

April 14, 2026

Zmiana pod presją: jak rośnie koszt zmiany i jak go zatrzymać

JUG Poznań @ OLX 📍 Poznań, Poland PL

Why does the cost of change grow, and how to stop it?

May 14, 2026

Zmiana pod presją: jak rośnie koszt zmiany i jak go zatrzymać

Javeloper Online 📍 Online PL

Why does the cost of change grow, and how to stop it?

June 24, 2026

Zmiana pod presją: jak rośnie koszt zmiany i jak go zatrzymać

JUG Toruń 📍 Toruń, Poland PL

Why does the cost of change grow, and how to stop it?

More events to be announced

Past Talks

2026

Zmiana pod presją: jak rośnie koszt zmiany i jak go zatrzymać

PL

JUG Poznań @ OLX / Javeloper / JUG Toruń

Why does the cost of change grow, and how to stop it? How to consciously design boundaries, limit coordination cost, and work with legacy code so that every change is safer and cheaper than the last.

2025

Odkrywając dziedzictwo – jak budować jutro?

PL

TEDxPUT

TEDx talk exploring how we can learn from the past to build a better tomorrow.

2024

Embracing Clean Architecture in Spring Boot and Kotlin

EN

JDD

Practical guide to implementing Clean Architecture in Spring Boot applications using Kotlin.

2023

Design Patterns revisited in Kotlin

EN

4Developers

A fresh look at classic design patterns and how Kotlin's features make them more elegant.

How not to Hibernate?

PL

CodeFrenzy

Common Hibernate mistakes and how to avoid them for better performance and maintainability.

How not to Hibernate?

PL

Javeloper

Common Hibernate mistakes and how to avoid them for better performance and maintainability.

2022

Hibernate and Kotlin? You do it wrong!

PL

4Developers • Poznań | Wrocław | Łódź

Presentation about Kotlin and Hibernate - what should be considered before mixing them in one project.