Daniel Witkowski

Principal Sales Engineer at Azul with over 20 years of experience in software engineering, performance tuning, and technical consulting — with the last decade dedicated to helping enterprises across EMEA and globally get the most out of the Java platform.

Stable, Secure, and Affordable Java

Azul Platform Core is the #1 Oracle Java alternative, offering OpenJDK support for more versions (including Java 6 & 7) and more configurations for the greatest business value and lowest TCO.

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Step up your coding with the Continuous Feedback Udemy Course: Additional coupons are available

What do you know about the code changes that were just introduced into the codebase? When will you notice if something goes wrong?

Jakarta EE 11: Beyond the Era of Java EE

This user guide provides a brief history of Java EE/Jakarta EE and a detailed overview of some of the specifications that will be updated in Jakarta EE 11.

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Foojay Podcast #84: Developing Performant, Cost Efficient, and Eco-friendly Code

Table of Contents YouTubePodcast AppsContent In this Foojay Podcast, we're exploring a critical topic that's becoming increasingly important in our industry: developing sustainable software that is both performant and environmentally friendly. At the Devoxx and JFall conferences, I had fascinating ...

Dec 01 1,5K

Daniel Witkowski

Frank Delporte

Ko Turk

Ronald Dehuysser

Podcast

The Art of Performance Tuning: Why Saving 30% in the Cloud Means Nothing if Your Code Wastes 1000× More

Table of Contents The Hidden Cost of “Good Enough” CodeA Quick Reality Check – Programming Languages and EnergyLet’s see how good am I with performance analysisStep One – Exceptions as LogicStep Two – The RegExp TrapStep Three – Let the …

Nov 25 2,9K

Daniel Witkowski

Performance

Profiler Kafka Java Design Patterns Debugging

Retweet on Twitter Foojay.io Retweeted

Interesting read on @foojayio about the current state of the @grailsframework, at @TheASF
Written by @spoole167 interviewing @JamesFredley
https://foojay.io/today/grails-isnt-done-yet-part-1-inside-the-asf-reboot/

11:31 AM · March 25, 2026

Retweet on Twitter Foojay.io Retweeted

#Java 26 is here, and its main purpose is to provide a solid foundation for future things to come. It comes with new features, performance improvements and multiple enhancements–my blog post has all the info! 🚀

07:15 AM · March 17, 2026