Lukas Jungmann
Principal Software Engineer at Oracle
Prague, Prague, Czechia
Summary
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Rockstar🎓
Top SchoolLukas Jungmann is a Principal Software Engineer with 14 years of experience leading specification and implementation work across the Jakarta EE ecosystem, having driven projects like Jakarta Persistence, JSON Processing, XML Web Services and their Eclipse implementations. He leads a six-person team and has progressed from QA and test automation into technical and project leadership roles at Sun, Red Hat and Oracle, contributing to both specs (JSR 67, 224, 338) and reference implementations such as EclipseLink and Eclipse JAXB. A top-3 contributor in his area, he combines deep backend engineering—modernizing projects for Java SE 11+, dependency upgrades and annotation handling—with pragmatic project management and CI/test framework design. Notably, his open-source contributions include enhancing TestNG integrations for IDE reporting and upgrading eclipselink to newer ASM and JAXB implementations, demonstrating a knack for tackling compatibility and tooling challenges that keep large Java stacks healthy.
14 years of coding experience
13 years of employment as a software developer
Bachelor's degree, Applied Informatics, Bachelor's degree, Applied Informatics at The University of Finance and AdministrationApplied Informatics, Applied Informatics at Masaryk University Faculty of Informatics
English, Czech, French, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (7)
javas10
jvm10
java10
testng10
testing10
junit9
dependency-management9
Programming languages (7)
Github contributions (5)
eclipse-ee4j/eclipselink
Jun 2015 - Dec 2022
Eclipselink project
Role in this project:
Back-end Developer
Back-end DeveloperContributions:797 reviews, 440 commits, 1004 PRs in 7 years 7 months
Contributions summary:Lukas's contributions primarily focused on upgrading the project to ASM 6.0 final, which involved upgrading ASM library versions in the eclipselink project and making required code adjustments. The user also worked on bug fixes and code enhancements, as well as addressing issues related to dependency management (like moving to a new JAXB implementation). In addition, they implemented the functionality of annotations with ElementType.TYPE_USE are handled properly and addressed issues related to Java SE 11 and newer versions.
groovyeclipselinkswtnetbeansosgi
testng-team/testng
Nov 2011 - Apr 2012
TestNG testing framework
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:47 commits in 5 months
Contributions summary:Lukas primarily contributed to the TestNG testing framework by adding and modifying features related to test listeners. They implemented a new listener to report test statuses for NetBeans, enhancing the integration capabilities. Furthermore, the user added the elapsed time to the logged messages and refactored the reporting mechanism, making the framework more user-friendly for developers. Finally, they made adjustments to the Ant task to support JUnit tests.
test-automationtesting-frameworktestingjvmtestng
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