Jeroen Heijmans
@jeroenheijmans.nl
Coding | Cooking | Gaming. He/him. Also on Mastodon at: https://mastodon.social/@jeroenheijmans
Reposted by Jeroen Heijmans
#AdventOfCode 2025 sponsorship is now open! If your organization might be interested in sponsoring, please have them email sponsorship at [the Advent of Code domain name]. adventofcode.com/2025/sponsors
November 4, 2025 at 3:35 AM
#AdventOfCode 2025 sponsorship is now open! If your organization might be interested in sponsoring, please have them email sponsorship at [the Advent of Code domain name]. adventofcode.com/2025/sponsors
Organizing an #AdventOfCode meetup together with colleagues at @infi.nl on DEC 9th. Come join us!
Hah! Het is weer zover!!
December is weer #AdventOfCode maand! Ook dit jaar hebben we weer een meetup gepland, waar jij ook welkom bent! 🧡
DI 09 DEC, inloop vanaf ~17:30
Infi AdventOfCode Meetup
Samen puzzelen, lekker eten en drinken, samen nerden.... komt allen!
www.meetup.com/infi-develop...
December is weer #AdventOfCode maand! Ook dit jaar hebben we weer een meetup gepland, waar jij ook welkom bent! 🧡
DI 09 DEC, inloop vanaf ~17:30
Infi AdventOfCode Meetup
Samen puzzelen, lekker eten en drinken, samen nerden.... komt allen!
www.meetup.com/infi-develop...
Advent of Code Meetup December 2025, Tue, Dec 9, 2025, 5:30 PM | Meetup
Het is weer zover! ⭐⭐ In december bijten we ons bij Infi stuk op de Advent of Code puzzels. 🎄 En op **DINSDAG 9 DECEMBER** kun jij er bij zijn: dan gaan we na werk samen e
www.meetup.com
November 7, 2025 at 3:07 PM
Organizing an #AdventOfCode meetup together with colleagues at @infi.nl on DEC 9th. Come join us!
Trying to skip the tutorials and dive straight into some 3D work in Godot and I'm not having a good time 😅 - some steep learning curves that shan't be skipped, I suppose. (Which is a fair requirement of course.)
November 3, 2025 at 7:14 PM
Trying to skip the tutorials and dive straight into some 3D work in Godot and I'm not having a good time 😅 - some steep learning curves that shan't be skipped, I suppose. (Which is a fair requirement of course.)
Reposted by Jeroen Heijmans
📣THREAD: It’s surprising to me that so many people were surprised to learn that Signal runs partly on AWS (something we can do because we use encryption to make sure no one but you–not AWS, not Signal, not anyone–can access your comms).
It’s also concerning. 1/
It’s also concerning. 1/
PSA: we're aware that Signal is down for some people. This appears to be related to a major AWS outage. Stand by.
October 27, 2025 at 10:38 AM
📣THREAD: It’s surprising to me that so many people were surprised to learn that Signal runs partly on AWS (something we can do because we use encryption to make sure no one but you–not AWS, not Signal, not anyone–can access your comms).
It’s also concerning. 1/
It’s also concerning. 1/
Reposted by Jeroen Heijmans
Hello, friends! After 10(!) years of #AdventOfCode, I've made some changes to preserve my sanity: there will be 12 days of puzzles each December (still starting Dec 1) and there is no longer a global leaderboard. Read more:
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
October 22, 2025 at 2:32 AM
Hello, friends! After 10(!) years of #AdventOfCode, I've made some changes to preserve my sanity: there will be 12 days of puzzles each December (still starting Dec 1) and there is no longer a global leaderboard. Read more:
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
adventofcode.com/2025/about#f...
Reposted by Jeroen Heijmans
📣 Germany's close to reversing its opposition to mass surveillance & private message scanning, & backing the Chat Control bill. This could end private comms-& Signal-in the EU.
Time's short and they're counting on obscurity: please let German politicians know how horrifying their reversal would be.
Time's short and they're counting on obscurity: please let German politicians know how horrifying their reversal would be.
We are alarmed by reports that Germany is on the verge of a catastrophic about-face, reversing its longstanding and principled opposition to the EU’s Chat Control proposal which, if passed, could spell the end of the right to privacy in Europe. signal.org/blog/pdfs/ge...
signal.org
October 6, 2025 at 6:46 AM
📣 Germany's close to reversing its opposition to mass surveillance & private message scanning, & backing the Chat Control bill. This could end private comms-& Signal-in the EU.
Time's short and they're counting on obscurity: please let German politicians know how horrifying their reversal would be.
Time's short and they're counting on obscurity: please let German politicians know how horrifying their reversal would be.
Back home from #Fronteers "Dark Mode" evening conference, MC'd by @bram.us - taking a moment to share my sketch notes in this thread before tucking in!
October 3, 2025 at 10:22 PM
Back home from #Fronteers "Dark Mode" evening conference, MC'd by @bram.us - taking a moment to share my sketch notes in this thread before tucking in!
Wrote a (Dutch) blogpost for Infi... 👀😁
Onze strategiedag van 2025 was volledig gewijd aan techniek. Nou ja, natuurlijk was er ook tijd voor wat ontspanning!
Een indruk krijgen van hoe het was, en waar we aan gewerkt hebben? Op ons blog te lezen! infi.nl/nieuws/strat...
Een indruk krijgen van hoe het was, en waar we aan gewerkt hebben? Op ons blog te lezen! infi.nl/nieuws/strat...
Strategiedag 2025
Ruwweg een keer per jaar gaan we met het hele bedrijf "de hei" op: een strategiedag! Lees hier meer over de 2025-editie...
infi.nl
September 18, 2025 at 8:00 AM
Wrote a (Dutch) blogpost for Infi... 👀😁
Reposted by Jeroen Heijmans
📢 The State of HTML Survey is live survey.devographics.com/en-US/survey...
The #HTML and #CSS surveys are the only web surveys I don't want to miss. Thank you @sachagreif.com for making them, and @lea.verou.me for curating.
Please take a few minutes to fill the survey if/when you can. ✨
The #HTML and #CSS surveys are the only web surveys I don't want to miss. Thank you @sachagreif.com for making them, and @lea.verou.me for curating.
Please take a few minutes to fill the survey if/when you can. ✨
State of HTML 2025
Take the State of HTML survey
survey.devographics.com
July 20, 2025 at 4:22 PM
📢 The State of HTML Survey is live survey.devographics.com/en-US/survey...
The #HTML and #CSS surveys are the only web surveys I don't want to miss. Thank you @sachagreif.com for making them, and @lea.verou.me for curating.
Please take a few minutes to fill the survey if/when you can. ✨
The #HTML and #CSS surveys are the only web surveys I don't want to miss. Thank you @sachagreif.com for making them, and @lea.verou.me for curating.
Please take a few minutes to fill the survey if/when you can. ✨
Google's Gemini has given me answers to completely different and highly specific questions than what I asked about, twice in a short timespan now.
I'd hazard a guess they have some threading / isolation / whatever bug, where we get answers to questions *other* users have asked. 🫠
I'd hazard a guess they have some threading / isolation / whatever bug, where we get answers to questions *other* users have asked. 🫠
July 9, 2025 at 11:41 PM
Google's Gemini has given me answers to completely different and highly specific questions than what I asked about, twice in a short timespan now.
I'd hazard a guess they have some threading / isolation / whatever bug, where we get answers to questions *other* users have asked. 🫠
I'd hazard a guess they have some threading / isolation / whatever bug, where we get answers to questions *other* users have asked. 🫠
Surprised that we don't see more supply chain attacks via vscode extensions. 🤔
I follow hackernews somewhat regularly and would've expected more incidents, especially given the "Auto Update" default for extensions + elevated level they run at.
(knocks-on-wood)
I follow hackernews somewhat regularly and would've expected more incidents, especially given the "Auto Update" default for extensions + elevated level they run at.
(knocks-on-wood)
July 7, 2025 at 10:07 PM
Surprised that we don't see more supply chain attacks via vscode extensions. 🤔
I follow hackernews somewhat regularly and would've expected more incidents, especially given the "Auto Update" default for extensions + elevated level they run at.
(knocks-on-wood)
I follow hackernews somewhat regularly and would've expected more incidents, especially given the "Auto Update" default for extensions + elevated level they run at.
(knocks-on-wood)
Sharepoint's Folder/File server UX on the web is absolute nuts 🤯
Moving files into sub-folders is considered "advanced" and requires a separate screen, browser back/next navigation does *not* work, open-in-new-tab for files and folders doesn't work, etc.
</rant> 😅
Moving files into sub-folders is considered "advanced" and requires a separate screen, browser back/next navigation does *not* work, open-in-new-tab for files and folders doesn't work, etc.
</rant> 😅
July 7, 2025 at 9:10 AM
Sharepoint's Folder/File server UX on the web is absolute nuts 🤯
Moving files into sub-folders is considered "advanced" and requires a separate screen, browser back/next navigation does *not* work, open-in-new-tab for files and folders doesn't work, etc.
</rant> 😅
Moving files into sub-folders is considered "advanced" and requires a separate screen, browser back/next navigation does *not* work, open-in-new-tab for files and folders doesn't work, etc.
</rant> 😅
Looking back, I've written a total of 40 blogposts for @infi.nl's blog in the past 8 years, so roughly 5 posts per year. Enjoyed writing all of those!
Archived all of them too, which was good because some old ones got cut/lost in a migration 😅
Archived all of them too, which was good because some old ones got cut/lost in a migration 😅
July 4, 2025 at 8:14 AM
Looking back, I've written a total of 40 blogposts for @infi.nl's blog in the past 8 years, so roughly 5 posts per year. Enjoyed writing all of those!
Archived all of them too, which was good because some old ones got cut/lost in a migration 😅
Archived all of them too, which was good because some old ones got cut/lost in a migration 😅
Onboarding in a new domain, made a glossary for myself. Asked for feedback from the team, giving me back-to-school vibes 😅... hoping I'll "pass the exam" 😂
July 3, 2025 at 10:17 AM
Onboarding in a new domain, made a glossary for myself. Asked for feedback from the team, giving me back-to-school vibes 😅... hoping I'll "pass the exam" 😂
Roughly 1 out of 10 projects I'll use Pen & Paper for notes. Didn't realize folks I only know through that project tend to think that I'm "fully analog" which tends to surprise people 😅
(When I use pen & paper I digitize -or throw away- notes shortly afterwards.)
(When I use pen & paper I digitize -or throw away- notes shortly afterwards.)
July 2, 2025 at 6:49 AM
Roughly 1 out of 10 projects I'll use Pen & Paper for notes. Didn't realize folks I only know through that project tend to think that I'm "fully analog" which tends to surprise people 😅
(When I use pen & paper I digitize -or throw away- notes shortly afterwards.)
(When I use pen & paper I digitize -or throw away- notes shortly afterwards.)
Great session by @dedependance.eu where @evelynaustin.bsky.social and @meredithmeredith.bsky.social spoke about Signal, surveillance, AI, and more! Well organized! 💯🎉
Today I also tried to absorb insights through sketch noting, giving an impression of what was discussed:
Today I also tried to absorb insights through sketch noting, giving an impression of what was discussed:
July 1, 2025 at 8:14 PM
Great session by @dedependance.eu where @evelynaustin.bsky.social and @meredithmeredith.bsky.social spoke about Signal, surveillance, AI, and more! Well organized! 💯🎉
Today I also tried to absorb insights through sketch noting, giving an impression of what was discussed:
Today I also tried to absorb insights through sketch noting, giving an impression of what was discussed:
Thread with my sketch notes for @joyofcoding.bsky.social's #JoyOfCoding 2025 conference incoming.... ⬇️😊
June 27, 2025 at 7:25 AM
Thread with my sketch notes for @joyofcoding.bsky.social's #JoyOfCoding 2025 conference incoming.... ⬇️😊
Looking forward to #JoyOfCoding 2025! Have missed a couple of editions, but was always happy and inspired when I did visit in the past 😊
June 26, 2025 at 11:17 AM
Looking forward to #JoyOfCoding 2025! Have missed a couple of editions, but was always happy and inspired when I did visit in the past 😊
Trying out Wiremock and MockServiceWorker and both in their own ways are equally magical and frustrating.
The frustration part is driving me towards a bare-bones homebrew mock server with expressjs or dotnet. :/
The frustration part is driving me towards a bare-bones homebrew mock server with expressjs or dotnet. :/
May 27, 2025 at 1:12 PM
Trying out Wiremock and MockServiceWorker and both in their own ways are equally magical and frustrating.
The frustration part is driving me towards a bare-bones homebrew mock server with expressjs or dotnet. :/
The frustration part is driving me towards a bare-bones homebrew mock server with expressjs or dotnet. :/
Talking to 5th or 6th line support on a cloud provider issue we have.
If "Seven Degrees of Separation" also holds for engineering support, then I must just about be talking to the actual engineers building this resource?
Would've called it 'fun', were it not for the 12 hours invested so far :/
If "Seven Degrees of Separation" also holds for engineering support, then I must just about be talking to the actual engineers building this resource?
Would've called it 'fun', were it not for the 12 hours invested so far :/
May 23, 2025 at 1:48 PM
Talking to 5th or 6th line support on a cloud provider issue we have.
If "Seven Degrees of Separation" also holds for engineering support, then I must just about be talking to the actual engineers building this resource?
Would've called it 'fun', were it not for the 12 hours invested so far :/
If "Seven Degrees of Separation" also holds for engineering support, then I must just about be talking to the actual engineers building this resource?
Would've called it 'fun', were it not for the 12 hours invested so far :/
Have *not* enjoyed Ubuntu over these past months. Bricked the video drivers now too. Not fixing this, taking this as a sign to try another distro (Pop_OS) instead.
April 5, 2025 at 8:11 PM
Have *not* enjoyed Ubuntu over these past months. Bricked the video drivers now too. Not fixing this, taking this as a sign to try another distro (Pop_OS) instead.
Paused to try the hype that is the new 4o-based image generation, and I must say:
It's pretty darn good!! (For what it is.) 😁
It's pretty darn good!! (For what it is.) 😁
March 28, 2025 at 8:53 AM
Paused to try the hype that is the new 4o-based image generation, and I must say:
It's pretty darn good!! (For what it is.) 😁
It's pretty darn good!! (For what it is.) 😁
Speaking at the #NimmaCodes cross-language user group this Tuesday 😊 - Decided to make some Sketch Notes of the talk beforehand and post it as a teaser, contains minor spoilers of course 😉
March 24, 2025 at 9:30 PM
Speaking at the #NimmaCodes cross-language user group this Tuesday 😊 - Decided to make some Sketch Notes of the talk beforehand and post it as a teaser, contains minor spoilers of course 😉
Rewatching a recording of my presentation to improve for the next iteration.... Dang, this never seems to get easy (watching yourself on stage)? Wonder what % of public speakers get "over" this feeling?
March 22, 2025 at 6:16 PM
Rewatching a recording of my presentation to improve for the next iteration.... Dang, this never seems to get easy (watching yourself on stage)? Wonder what % of public speakers get "over" this feeling?
Enjoyd #DPC25 + AppDevCon + WebDevCon today! Posted my Sketch Notes over at Mastodon: mastodon.social/@jeroenheijm...
JeroenHeijmans (@jeroenheijmans@mastodon.social)
Thread for all my @dpc_ibuildings #DPC25 (Dutch PHP Conference) + AppDevDon + WebDevCon sketch notes, incoming!
...
mastodon.social
March 21, 2025 at 8:36 PM
Enjoyd #DPC25 + AppDevCon + WebDevCon today! Posted my Sketch Notes over at Mastodon: mastodon.social/@jeroenheijm...