Arjen (a.k.a. credmp)
@arjenwiersma.nl
Hacker && Software developer. I use Emacs, macOS and Linux. love Java and Rust.
Hey #Java #Emacs users, I am trying to smoothen my workflow. One thing that annoys me is to go to mvnrepository.com to look up a package. I am creating a little helper for it, anyone interested?
November 7, 2025 at 3:20 PM
Hey #Java #Emacs users, I am trying to smoothen my workflow. One thing that annoys me is to go to mvnrepository.com to look up a package. I am creating a little helper for it, anyone interested?
I gave my workshop at #jfall2025 #jfall today. It was a success, a packed room and people working through my AI challenges for 2 hours. If you attended you might like the slides, they are available on my talks page: arjenwiersma.nl/talks/
Arjen Wiersma
Talks I occasionally speak at conferences and meetups. Below are some of my active talks that I am presenting. If you would like me to present at your conference or meetup, feel free to contact me.
arjenwiersma.nl
November 6, 2025 at 9:40 PM
I gave my workshop at #jfall2025 #jfall today. It was a success, a packed room and people working through my AI challenges for 2 hours. If you attended you might like the slides, they are available on my talks page: arjenwiersma.nl/talks/
Just finished up my workshop at #jfall #jfall2025! Great crowd and lots of interaction, even in the silent disco setup!
November 6, 2025 at 11:40 AM
Just finished up my workshop at #jfall #jfall2025! Great crowd and lots of interaction, even in the silent disco setup!
I made an update to my #emacs upiv package from yesterday, it now supports marginalia mode for even nicer support with configuring use-package.
URL: forge.arjenwiersma.nl/arjen/upiv
URL: forge.arjenwiersma.nl/arjen/upiv
November 1, 2025 at 9:49 AM
I made an update to my #emacs upiv package from yesterday, it now supports marginalia mode for even nicer support with configuring use-package.
URL: forge.arjenwiersma.nl/arjen/upiv
URL: forge.arjenwiersma.nl/arjen/upiv
I so love my #emacs, was configuring some packages and wanted something easier, so I wrote a small function that will look up all the custom variables for a package and provide them as completion, allowing you to easily insert them. Trying to be more like @xenodium.bsky.social by sharing.
October 30, 2025 at 3:00 PM
I so love my #emacs, was configuring some packages and wanted something easier, so I wrote a small function that will look up all the custom variables for a package and provide them as completion, allowing you to easily insert them. Trying to be more like @xenodium.bsky.social by sharing.
During my talk at #devoxx I talked about how big systems leak data through bad #ai implementations, this morning I read about copilot for GitHub: www.legitsecurity.com/blog/camolea... it never stops…
CamoLeak: Critical GitHub Copilot Vulnerability Leaks Private Source Code
Get details on our discovery of a critical vulnerability in GitHub Copilot Chat.
www.legitsecurity.com
October 12, 2025 at 10:42 AM
During my talk at #devoxx I talked about how big systems leak data through bad #ai implementations, this morning I read about copilot for GitHub: www.legitsecurity.com/blog/camolea... it never stops…
Reposted by Arjen (a.k.a. credmp)
October 8, 2025 at 1:26 PM
Had an amazing time presenting at #Devoxx! The room was packed, with some people sitting on the stairs, if the favorites are anything to go by there were over 300 people in the room. The talk was rated 4.7 out of 5, which for me is amazing, thank you all so much!
October 8, 2025 at 7:52 PM
Had an amazing time presenting at #Devoxx! The room was packed, with some people sitting on the stairs, if the favorites are anything to go by there were over 300 people in the room. The talk was rated 4.7 out of 5, which for me is amazing, thank you all so much!
Hey you Java person! Are you going to @devoxx.com ? Be sure to visit my talk on the security side of vibe-coding. Check it out in the app: www.devoxx.be/app/talk/325...
Devoxx Companion App – Devoxx Belgium
www.devoxx.be
September 4, 2025 at 10:42 AM
Hey you Java person! Are you going to @devoxx.com ? Be sure to visit my talk on the security side of vibe-coding. Check it out in the app: www.devoxx.be/app/talk/325...
In april Microsoft said 30% of their code was written by AI, coinbase is pushing even further with 40% and aiming for 50% by October. Massive numbers, but still in a controlled way (reviewed)
September 4, 2025 at 5:26 AM
In april Microsoft said 30% of their code was written by AI, coinbase is pushing even further with 40% and aiming for 50% by October. Massive numbers, but still in a controlled way (reviewed)
Reposted by Arjen (a.k.a. credmp)
📅 The wait is over: the #Devoxx Belgium 2025 schedule is out!
Plan your week, pick your favourites ❤️https://m.devoxx.com/events/dvbe25/schedule
Plan your week, pick your favourites ❤️https://m.devoxx.com/events/dvbe25/schedule
August 28, 2025 at 1:51 PM
📅 The wait is over: the #Devoxx Belgium 2025 schedule is out!
Plan your week, pick your favourites ❤️https://m.devoxx.com/events/dvbe25/schedule
Plan your week, pick your favourites ❤️https://m.devoxx.com/events/dvbe25/schedule
Reposted by Arjen (a.k.a. credmp)
Rest well, Ozzy. Everyone listen to Tribute in his honor today. music.apple.com/us/album/tri...
Tribute (Live) by Ozzy Osbourne on Apple Music
Album · 1987 · 14 Songs
music.apple.com
July 22, 2025 at 6:21 PM
Rest well, Ozzy. Everyone listen to Tribute in his honor today. music.apple.com/us/album/tri...
Just posted my first of 12(!) parts on AI Security. A bite-sized deep-dive into AI security delivered right into your mailbox from my substack. Check it out: credmp.substack.com
June 23, 2025 at 7:13 AM
Just posted my first of 12(!) parts on AI Security. A bite-sized deep-dive into AI security delivered right into your mailbox from my substack. Check it out: credmp.substack.com
June 9, 2025 at 8:36 AM
EU ruling: tracking-based advertising across Europe has no legal basis.
A massive ruling that is effective right away, means that organisations that rely heavily on advertisement (such as dpg/nu.nl in the Netherlands) will have to review and adjust their practices.
www.iccl.ie/digital-data...
A massive ruling that is effective right away, means that organisations that rely heavily on advertisement (such as dpg/nu.nl in the Netherlands) will have to review and adjust their practices.
www.iccl.ie/digital-data...
EU ruling: tracking-based advertising by Google, Microsoft, Amazon, X, across Europe has no legal basis - Irish Council for Civil Liberties
Landmark court decision against “TCF” consent pop ups on 80% of the internet
www.iccl.ie
May 18, 2025 at 8:03 AM
EU ruling: tracking-based advertising across Europe has no legal basis.
A massive ruling that is effective right away, means that organisations that rely heavily on advertisement (such as dpg/nu.nl in the Netherlands) will have to review and adjust their practices.
www.iccl.ie/digital-data...
A massive ruling that is effective right away, means that organisations that rely heavily on advertisement (such as dpg/nu.nl in the Netherlands) will have to review and adjust their practices.
www.iccl.ie/digital-data...
Remember how Microsoft said it would go to court to protect European interests if faced with American orders to work against it? Seems it was not entirely true:
www.techradar.com/pro/microsof...
www.pbs.org/newshour/wor...
“Microsoft, for example, cancelled Khan’s email address”.
www.techradar.com/pro/microsof...
www.pbs.org/newshour/wor...
“Microsoft, for example, cancelled Khan’s email address”.
Microsoft says it would take the US to court to protect European cloud operations | TechRadar
Microsoft makes five promises to European customers
www.techradar.com
May 18, 2025 at 7:22 AM
Remember how Microsoft said it would go to court to protect European interests if faced with American orders to work against it? Seems it was not entirely true:
www.techradar.com/pro/microsof...
www.pbs.org/newshour/wor...
“Microsoft, for example, cancelled Khan’s email address”.
www.techradar.com/pro/microsof...
www.pbs.org/newshour/wor...
“Microsoft, for example, cancelled Khan’s email address”.
Today I was at the futuretech conference in Utrecht. Really liked @fonssonnemans.bsky.social talk about performance analysis.
March 13, 2025 at 3:03 PM
Today I was at the futuretech conference in Utrecht. Really liked @fonssonnemans.bsky.social talk about performance analysis.
Using @openvibe.social feels to me like using eBuddy back when there were a lot of instant messaging apps. Everything neatly in a single space, one user experience. Very nice so far.
January 29, 2025 at 6:26 AM
Using @openvibe.social feels to me like using eBuddy back when there were a lot of instant messaging apps. Everything neatly in a single space, one user experience. Very nice so far.
Do we know anyone at @digitalocean.com here? Their app platform has a provisioning issue that renders postgres 16 dev databases useless and their support is not particularly helpful. Any help in my network is appreciated! #digitalocean #postgresql
December 30, 2024 at 8:59 PM
Do we know anyone at @digitalocean.com here? Their app platform has a provisioning issue that renders postgres 16 dev databases useless and their support is not particularly helpful. Any help in my network is appreciated! #digitalocean #postgresql
Reposted by Arjen (a.k.a. credmp)
Hey it'd be super cool if you reposted this post to let all your cool friends know that @slashdot.org is on Bluesky now!
December 10, 2024 at 5:55 AM
Hey it'd be super cool if you reposted this post to let all your cool friends know that @slashdot.org is on Bluesky now!