Jonatan Ivanov

Jonatan Ivanov is an enthusiastic Software Engineer, member of the Spring Engineering Team, one of the leaders of the Seattle Java User Group, speaker, author, certified dragon trainer. He has hands-on experience in developing and shipping innovative, production-ready software for industry-leader companies. He likes Distributed Systems, Production, Open Source, Math, Linux, Cloud environments; he is passionate about the Java Ecosystem and the Java Community. He is an Open Source contributor, writes a "develotters"-focused blog (https://develotters.com) and he can be found on Twitter(@jonatan_ivanov).

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.

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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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?

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Couch to fully-observed code with Spring Boot 3.2, Micrometer Tracing, and Digma

Collecting important data about your code in dev and test has become trivial, it's now also getting easier to put that data to use.

Dec 06 5,1K

Jonatan Ivanov

Roni Dover

Developer Tools

Java Observability Spring

Confusing Java Strings

How to avoid trouble with Java String and Unicode characters!

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Jonatan Ivanov

Java Core

Retweet on Twitter Foojay.io Retweeted

The hottest #Java unconference in the world is coming back 27-31 July 2026 (starting evening of 26th). Deep discussions about Java and life. We are making some seats available using a lottery system. Draw will be on Friday the 20th Feb. Sign up here: https://www.jcrete.org/lottery

08:45 PM · February 09, 2026

Retweet on Twitter Foojay.io Retweeted

Confession: I usually lose the Flow switching between Quality Gates and Code 📉😅

But I connected @claudeai + #SonarQube via #MCP

Verify & Fix vulnerabilities without touching the mouse.
Zero context switching. Pure flow. 🚀

https://foojay.io/today/claude-code-sonarqube-mcp/

#Java #AI @foojayio

03:56 PM · February 02, 2026

Retweet on Twitter Foojay.io Retweeted

Hola Java devs! 👋 The #SonarQube AI Code Assurance #article is LIVE on @foojayio ! 🎉

Stop just finding bugs. 🛑 Use SonarQube's new AI "Magic Button" to auto-fix them instantly! 🤯🪄

Crush that tech debt fast. 🚀☕️ #Java #AI @SonarSource

https://foojay.io/today/sonarqube-part-4-ai-code-assurance/

04:44 PM · January 19, 2026