Roy van Rijn
@royvanrijn.com
Director of OpenValue Rotterdam, is a @Java_Champions, founder of Rotterdam JUG, public speaking: Java, AI, math, algorithms
Damn, just looked up Apeldoorn, that area is amazing
October 29, 2025 at 2:56 PM
Damn, just looked up Apeldoorn, that area is amazing
October 6, 2025 at 2:07 PM
Roy, it looks like there is a typo in your resume, it says Scumm Master instead of Scrum Master.
...
Nope.
...
Nope.
August 12, 2025 at 11:41 AM
Roy, it looks like there is a typo in your resume, it says Scumm Master instead of Scrum Master.
...
Nope.
...
Nope.
Found one, this algorithm is easy.
June 5, 2025 at 8:27 PM
Found one, this algorithm is easy.
Best slogan I could come up with for a software company from Rotterdam 😅
Get your @openvalue.eu Rotterdam laptop sticker at @joyofcoding.bsky.social later this month 👍🏼
Get your @openvalue.eu Rotterdam laptop sticker at @joyofcoding.bsky.social later this month 👍🏼
June 4, 2025 at 9:24 AM
Best slogan I could come up with for a software company from Rotterdam 😅
Get your @openvalue.eu Rotterdam laptop sticker at @joyofcoding.bsky.social later this month 👍🏼
Get your @openvalue.eu Rotterdam laptop sticker at @joyofcoding.bsky.social later this month 👍🏼
Israel has its Iron Dome.
America will get a Golden Dome.
I propose a similar project for the Netherlands, we can call it… the Thunder Dome.
America will get a Golden Dome.
I propose a similar project for the Netherlands, we can call it… the Thunder Dome.
May 26, 2025 at 5:41 PM
Israel has its Iron Dome.
America will get a Golden Dome.
I propose a similar project for the Netherlands, we can call it… the Thunder Dome.
America will get a Golden Dome.
I propose a similar project for the Netherlands, we can call it… the Thunder Dome.
This is by far the best and scariest AI-generated creation I’ve come across.
(made with Veo 3)
(made with Veo 3)
May 22, 2025 at 10:23 PM
This is by far the best and scariest AI-generated creation I’ve come across.
(made with Veo 3)
(made with Veo 3)
A shift is happening in our family's € 1000,- investment challenge...
I've started to make a comeback, almost back into the green, my partner finally started to drop a little, and kid 1 is in a free fall 😅 📉
I've started to make a comeback, almost back into the green, my partner finally started to drop a little, and kid 1 is in a free fall 😅 📉
May 22, 2025 at 12:59 PM
A shift is happening in our family's € 1000,- investment challenge...
I've started to make a comeback, almost back into the green, my partner finally started to drop a little, and kid 1 is in a free fall 😅 📉
I've started to make a comeback, almost back into the green, my partner finally started to drop a little, and kid 1 is in a free fall 😅 📉
Wanted to take a shower but I suddenly have this incredible urge to complain and mumble “everything used to be better”… odd.
May 16, 2025 at 11:58 AM
Wanted to take a shower but I suddenly have this incredible urge to complain and mumble “everything used to be better”… odd.
Same, m'n kinderen hebben deze nog niet ontdekt, maar nu is er een mooie aanleiding.
May 16, 2025 at 10:25 AM
Same, m'n kinderen hebben deze nog niet ontdekt, maar nu is er een mooie aanleiding.
Fastest way to check if a year is a leap year?
hueffner.de/falk/blog/a-...
Best part:
"I couldn't immediately find a way to prove it, so I employed the tried-and-true method of getting someone else to do it for me by posting it to the Code Golf StackExchange."
hueffner.de/falk/blog/a-...
Best part:
"I couldn't immediately find a way to prove it, so I employed the tried-and-true method of getting someone else to do it for me by posting it to the Code Golf StackExchange."
May 16, 2025 at 9:52 AM
Fastest way to check if a year is a leap year?
hueffner.de/falk/blog/a-...
Best part:
"I couldn't immediately find a way to prove it, so I employed the tried-and-true method of getting someone else to do it for me by posting it to the Code Golf StackExchange."
hueffner.de/falk/blog/a-...
Best part:
"I couldn't immediately find a way to prove it, so I employed the tried-and-true method of getting someone else to do it for me by posting it to the Code Golf StackExchange."
Found a jumping spider (Marpissa muscosa) with a cool beard.
May 15, 2025 at 5:31 PM
Found a jumping spider (Marpissa muscosa) with a cool beard.
Me too! Right now it doesn't seem to be me haha.
But hey, it's a long game, both kid 2 and myself expect a recession and not a bull market (like today).
But hey, it's a long game, both kid 2 and myself expect a recession and not a bull market (like today).
May 13, 2025 at 2:13 PM
Me too! Right now it doesn't seem to be me haha.
But hey, it's a long game, both kid 2 and myself expect a recession and not a bull market (like today).
But hey, it's a long game, both kid 2 and myself expect a recession and not a bull market (like today).
I’m getting a crash course on the lore of Italian brainrot.
And I’m 100% convinced teenagers these days would love Salvador Dali.
And I’m 100% convinced teenagers these days would love Salvador Dali.
May 11, 2025 at 9:37 AM
I’m getting a crash course on the lore of Italian brainrot.
And I’m 100% convinced teenagers these days would love Salvador Dali.
And I’m 100% convinced teenagers these days would love Salvador Dali.
I mean, why *not* put yourself into Thunderbirds...
April 19, 2025 at 5:59 PM
I mean, why *not* put yourself into Thunderbirds...
It was awesome trying out the alpha version of NeuroCoder™.
Here you can see me learning Vue.js after hearing about it in the closing keynote.
Here you can see me learning Vue.js after hearing about it in the closing keynote.
April 1, 2025 at 11:34 AM
It was awesome trying out the alpha version of NeuroCoder™.
Here you can see me learning Vue.js after hearing about it in the closing keynote.
Here you can see me learning Vue.js after hearing about it in the closing keynote.
At least until I end up with a team where the majority is gen-z.
Then I’ll probably need to start recording TikTok PR’s…. 🫤
Then I’ll probably need to start recording TikTok PR’s…. 🫤
March 31, 2025 at 8:21 AM
At least until I end up with a team where the majority is gen-z.
Then I’ll probably need to start recording TikTok PR’s…. 🫤
Then I’ll probably need to start recording TikTok PR’s…. 🫤
TIL: The first nearly complete Neanderthal skeleton found in 1908 had severe arthritis, especially in his spine. Paleontologists assumed Neanderthals were dumb hunched-over apelike caveman…
Wasn’t until 40+ years later they realized Neanderthals were fully bipedal, walking exactly like we do today.
Wasn’t until 40+ years later they realized Neanderthals were fully bipedal, walking exactly like we do today.
March 30, 2025 at 2:30 PM
TIL: The first nearly complete Neanderthal skeleton found in 1908 had severe arthritis, especially in his spine. Paleontologists assumed Neanderthals were dumb hunched-over apelike caveman…
Wasn’t until 40+ years later they realized Neanderthals were fully bipedal, walking exactly like we do today.
Wasn’t until 40+ years later they realized Neanderthals were fully bipedal, walking exactly like we do today.
You: I’m a Scrum Master
Me: I’m a SCUMM master…
Me: I’m a SCUMM master…
March 13, 2025 at 8:07 PM
You: I’m a Scrum Master
Me: I’m a SCUMM master…
Me: I’m a SCUMM master…
Meet the Harvard Computers an extraordinary group of women working at the Harvard College Observatory.
They enabled measuring our place in the universe by measuring Cepheid stars. They discovered white dwarfs and demonstrated stars are mostly made of hydrogen and helium.
They enabled measuring our place in the universe by measuring Cepheid stars. They discovered white dwarfs and demonstrated stars are mostly made of hydrogen and helium.
March 8, 2025 at 7:23 PM
Meet the Harvard Computers an extraordinary group of women working at the Harvard College Observatory.
They enabled measuring our place in the universe by measuring Cepheid stars. They discovered white dwarfs and demonstrated stars are mostly made of hydrogen and helium.
They enabled measuring our place in the universe by measuring Cepheid stars. They discovered white dwarfs and demonstrated stars are mostly made of hydrogen and helium.
Rest in peace Dieuwertje... 🫡
March 3, 2025 at 11:50 AM
Rest in peace Dieuwertje... 🫡
This feels *really* unethical…
What are your thoughts on Windsurf IDE’s experimental “motivational” prompt?
What are your thoughts on Windsurf IDE’s experimental “motivational” prompt?
March 2, 2025 at 9:57 AM
This feels *really* unethical…
What are your thoughts on Windsurf IDE’s experimental “motivational” prompt?
What are your thoughts on Windsurf IDE’s experimental “motivational” prompt?