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Christian Grobmeier

@grobmeier.de
654 followers 587 following 344 posts

Java Champion & ASF VP Data Privacy. I write and speak about code, ethics, and what it means to build systems that last. Logging Off? grobmeier.de

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Christian Grobmeier @grobmeier.de · 21/09/2026
the sad thing is i don't feel to urge to talk to colleagues b/c i talk to ai so much these days luckily my wife makes sure i come out from the basement from time to time
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Christian Grobmeier @grobmeier.de · 13/09/2026
After a long time, I have submitted a talk for a conference again. Travelling and speaking isn't trivial for me. But I realised I probably need to do it again. And want it, too. Back into the saddle! Hopefully they accept the talk, and I'll see some of you there. #speaking #conferences #java
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Christian Grobmeier @grobmeier.de · 22/06/2026
Sometimes good things are very close
River in Landsberg am Lech. Peaceful, sunny atmosphere
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Christian Grobmeier @grobmeier.de · 20/06/2026
Just submitted my first mobile apps to review in years. The Apple experience is still better. But they charge 100€, which is ridiculous. Anyway, my pet project timeandbill.de will have its mobile apps back soon. #ios #android #productivity
timeandbill.de
Arbeitszeiterfassung - online, einfach, klar.
Erfassen Sie Ihre Arbeitszeit im Browser oder mobil. Mit Export, Reports und Datenschutz in Klartext.
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Christian Grobmeier @grobmeier.de · 07/06/2026
#HumbleBee is out: a local-first open source time tracker with CLI + GUI. It started after a canceled flight in San Francisco and a night at the airport, when I began using AI to learn Go faster. github.com/grobmeier/hu... PS: timeandbill.de exports are supported #golang #privacy #opensource #ai
github.com
GitHub - grobmeier/humblebee: Privacy first time tracking with CLI and GUI inspired by timeandbill.de
Privacy first time tracking with CLI and GUI inspired by timeandbill.de - grobmeier/humblebee
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Christian Grobmeier @grobmeier.de · 02/06/2026
I hate Slack. It’s a mess. Mails are much better. I know how old this makes me sound.
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Christian Grobmeier @grobmeier.de · 22/05/2026
I will never understand why people prefer Claude Code over Codex. Codex never “made up version numbers.” And it never told me to reverse-engineer anything, instead of using the ready-to-use Docker containers.
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Christian Grobmeier @grobmeier.de · 13/05/2026
Audio books read by people—I fully agree. Still I am addicted to the smell of paper (and I have some space left)
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Christian Grobmeier @grobmeier.de · 13/05/2026
I started buying physical books again last year. Nobody can take them away from me. Unless they send the firemen from Fahrenheit 451.
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Christian Grobmeier @grobmeier.de · 25/04/2026
Jack London’s The Sea-Wolf asked: What is a human being worth when power has no conscience? I ask again. What remains human when value becomes a calculation? #ai #ethics
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Christian Grobmeier @grobmeier.de · 06/04/2026
Last year was tough. This year continues like that.
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Christian Grobmeier @grobmeier.de · 15/01/2026
My book #Java Logging is the deal of the day! www.manning.com/books/java-l... If you consider it, today is a good day! #books #programming #log4j
manning.com
Java Logging - Christian Grobmeier
Logging is a must-know skill for Java developers. Logging is the art of making things visible—and when your codebase crashes at 5PM Friday you’ll want all the data you can get about your application!...
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Christian Grobmeier @grobmeier.de · 30/10/2025
Stuck in SFO. Lufthansa cancelled the flight after 6 hours waiting. No hotel, no water, shops are closed. Currently 25h on my feet. 7 more until I can sleep in the aircraft. Disappointing
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Christian Grobmeier @grobmeier.de · 30/10/2025
Oh no I missed your post! I was there — would have loved to meet you
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Christian Grobmeier @grobmeier.de · 27/10/2025
I already voted 1x before I came here…
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Christian Grobmeier @grobmeier.de · 27/10/2025
GitHub Day 0. Agentic #AI is everywhere in the US. #opensource can benefit from it, this talk says. But the speakers also say, devs will not be replaced—just accelerated.
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Christian Grobmeier @grobmeier.de · 25/10/2025
Only a few days ago, I joined Abby and Felix Reda on the Github Podcast—to talk about funding in #opensource that we have received from @sovereign.tech podcasts.apple.com/de/podcast/f... #java #log4j #log4shell
podcasts.apple.com
From Log4Shell to the Sovereign Tech Fund: Lessons in Open Source Sustainability
Podcast-Folge · The GitHub Podcast · 21.10.2025 · 31 Min.
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Christian Grobmeier @grobmeier.de · 24/10/2025
It’s omnipresent, but didn’t see anything related to it (thankfully)
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Christian Grobmeier @grobmeier.de · 24/10/2025
I am currently in San Francisco to attend #Github Universe. So far, so good. I like the city.
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Reposted by Christian Grobmeier
Stefano Cordio @scordio.github.io · 21/10/2025
"Nobody stops in to check on you. They check on the project. There’s also nobody standing up and saying, ‘hey, thank you for the good work you’re doing to remediate this issue.’" The harsh truth: maintainers give their spare time, yet positive feedback is rare. Appreciate who is behind the code. 💛
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Reposted by Christian Grobmeier
Marc Philipp @marcphilipp.de · 21/10/2025
As a fellow maintainer of an open source project, this is an intense and somewhat scary read. Thanks to @grobmeier.de for being so open to talk about what he experienced and @github.com for initiating their Secure Open Source Fund! github.blog/open-source/...
github.blog
Inside the breach that broke the internet: The untold story of Log4Shell
Log4Shell proved that open source security isn't guaranteed and isn’t just a code problem.
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Christian Grobmeier @grobmeier.de · 20/10/2025
Thank you! It means a lot to hear this
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Christian Grobmeier @grobmeier.de · 20/10/2025
I never imagined GitHub would ask me to speak about #Log4Shell. But it happened. @github.com asked me to share the story as I lived it, for the benefit of users of #opensource. How could I say no? I hope it helps build a more secure future. No more Log4Shell. #java
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Christian Grobmeier @grobmeier.de · 20/10/2025
OK, so enough hiatus. I'm back. It's Monday, early morning. Today, something will change. Will keep you posted.
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Christian Grobmeier @grobmeier.de · 19/09/2025
You are officially on my awesome list now :) Thank you!
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Christian Grobmeier @grobmeier.de · 18/09/2025
I dreamed of writing a "#Java Logging" book after #Log4shell hit. Today I’m proud to share: @manning.com just launched it in MEAP. Hard to describe what that means—a circle closes. Until Oct 2: 50% off: hubs.la/Q03Jv97v0 #log4j #java #logback #slf4j
hubs.la
Java Logging - Christian Grobmeier
Logging is a must-know skill for Java developers. Logging is the art of making things visible—and when your codebase crashes at 5PM Friday you’ll want all the data you can get about your application!...
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you Mark :-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Without your patience and guidance, none of this would have been possible. You are one of the most important mentors in my life, and I’m deeply grateful for everything you’ve done for me. I know who I was and how much your support helped me grow. Not only as a developer but as a human.
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you very much :)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Eberhard :)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Régina :-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Gerrit!
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Christian Grobmeier @grobmeier.de · 17/03/2025
Will do :-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Today, I was awarded the title of Java Champion! It’s a huge honor, and I’m grateful for everyone I’ve met in the Java universe, especially those who taught me how to code. I’m feeling happy and a little proud. 😊 #java #programming
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Christian Grobmeier @grobmeier.de · 17/03/2025
Wow, thanks, Andres, for the welcome and the update to the repo
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Jorge!
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you Thomas :)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Johan!
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you Markus. It's an honor!
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thanks Oliver. It's all your fault! ;-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you Eric :-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you Simon :-)
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Christian Grobmeier @grobmeier.de · 17/03/2025
Thank you!
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Christian Grobmeier @grobmeier.de · 27/02/2025
I guess you could say I am a power user now. However, some recommendations make my writing worse, not better.
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Christian Grobmeier @grobmeier.de · 24/02/2025
Gute Besserung!!
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Christian Grobmeier @grobmeier.de · 24/02/2025
You are right but in this case it is Matcha- next level chocolate!
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Christian Grobmeier @grobmeier.de · 24/02/2025
It feels good when something is finished, and I just finished the article for the new Javapro magazine. It's about the history of #Log4j. Proud of it. Needed a lot of chocolate. Not from #Java though, but #Japan :)
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Christian Grobmeier @grobmeier.de · 17/02/2025
I have been sick all of 2025, but I am getting my medicine today. I am starting new #Java training. These always lift my mood! I'm looking forward to it!
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Christian Grobmeier @grobmeier.de · 08/02/2025
Looks like some contracts were canceled this year. Which means I finally have time to work on my #java training website again 😊👍
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Christian Grobmeier @grobmeier.de · 07/02/2025
Cool. Das könnte ich ja fast schaffen!
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