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Martijn van Iersel

@mpvaniersel.bsky.social
44 followers 59 following 55 posts

I do creative things with Games, Education, Computing and Biology. Author of i18n-puzzles.com and Food Chain Farm.

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Martijn van Iersel @mpvaniersel.bsky.social · 04/07/2026
Here is a compilation from the #TINS2026 #GameJam. Do you see any game here that you'd like to play a little more? youtu.be/0nWwQSrhym0?...
youtu.be
Ten Games from the TINS 2026 Game Jam, bursting with fun!
YouTube video by Martijn van Iersel
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Martijn van Iersel @mpvaniersel.bsky.social · 19/05/2026
So far the story of #i18n-puzzles has been told only at Java conferences, even though Python was definitely the most popular solution language. That omission will be righted next week at #PyConIt2026 2026.pycon.it/en/event/fix...
2026.pycon.it
Fixing time zones for fun - twenty programming puzzles to master internationalization. | PyCon Italia
Join PyCon Italia May 27th to May 30th 2026 in Bologna, Italy!
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Martijn van Iersel @mpvaniersel.bsky.social · 08/05/2026
This Saturday in Amsterdam, come playtest indie games and see cool creative stuff. I'm giving a talk on maze algorithms! Creative Coding Amsterdam + Amsterdam Indie Game Devs organize this event together. www.meetup.com/amsterdam-in...
meetup.com
Assembly, Sat, May 9, 2026, 2:00 PM | Meetup
On the **9th of May**, we're joining forces with the **[Creative Coding Amsterdam](https://www.meetup.com/creative-coding-amsterdam/)** for a full afternoon and evening at
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Martijn van Iersel @mpvaniersel.bsky.social · 12/04/2026
Duolingo (currently using it to learn 中文) is a nice case study in gamification. It's also a cautionary tale against over-reliance on A/B testing. Giving you features that are research based, metrics-driven, experimentally PROVEN, but only suitable for perfect plastic people. 1/2
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Martijn van Iersel @mpvaniersel.bsky.social · 31/03/2026
How do you convince a software organization to adopt micro frontends? Curious? come see my lightning talk tomorrow at @amsterdam.voxxeddays.com
Speaker Badge - Martijn van Iersel - Voxxed days Amsterdam - The micro frontend game: a demo of cross-team scalability
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Martijn van Iersel @mpvaniersel.bsky.social · 24/03/2026
Today I joined JUG Noord @jugnoord.bsky.social to talk about my favorite topics, 🦍evolution & 🤓software development. Thanks for inviting me!
Me presenting
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Reposted by Martijn van Iersel
SiegeLord @siegelordex.bsky.social · 25/02/2026
TINS 2026 is coming in May: tins.amarillion.org Most jams just have a theme, but TINS gives you 5 rules! Restriction breeds creativity. Here's my 2024 entry: siegelord.itch.io/wasting Deliver supplies in space! The rules were: Trains, Art Nouveau, Customization, Quadratic Formula #gamejam #gamedev
siegelord.itch.io
Wasting by SiegeLord
Land on disease-wracked planets to deliver supplies, and help develop a cure!
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Martijn van Iersel @mpvaniersel.bsky.social · 24/02/2026
I invite you all to my 72h Game Jam! May 29-June 1st Random rules, Open source tins.amarillion.org #GameJam #TINS #TINS2026
Banner with the words: TINS Game Jam 2026 - May 29 - June 1st
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Martijn van Iersel @mpvaniersel.bsky.social · 14/01/2026
#Genuary #Genuary2026 #Genuary14 Prompt: Everything fits perfectly! Fit 9 squares of 9, 8 squares of 8, etc., inside a square of 45. A.k.a. the "partridge problem" (think of the Xmas carol). See the animation at amarillion.github.io/genuary26/
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Martijn van Iersel @mpvaniersel.bsky.social · 04/01/2026
#Genuary #Genuary4 #Genuary2026 Day 4: LowRes Revisiting another classic. Drawing Bresenham lines in XOR mode, creating this pretty Moiré pattern. On #zxspectrum, XOR mode was an optimization, but with current tech, it's a performance hit as it requires reading bitmap memory, a big no-no.
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Martijn van Iersel @mpvaniersel.bsky.social · 03/01/2026
#Genuary2026 #Genuary #Genuary3 "Fibonacci forever" - I went for a classic visualization of the golden spiral. Matching Fibonacci rectangles with a logarithmic spiral is actually rather finicky.
Golden spiral overlaid on Fibonacci rectangles.
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Martijn van Iersel @mpvaniersel.bsky.social · 02/01/2026
"Twelve Principles of Animation" #Genuary #Genuary2026 #Genuary2
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Martijn van Iersel @mpvaniersel.bsky.social · 01/01/2026
Starting off #genuary with a very simple animation. Genuary is one creative coding prompt per day, let's see how many I can get done in a month! #genuary1
A bouncing white circle leaving a gray trail.
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Martijn van Iersel @mpvaniersel.bsky.social · 27/11/2025
How horrible is the user experience of setting up a new smart phone 🤮. Today I did tech support for my elderly parents who both bought a new smart phone - they were still on Android 9 and essential apps (banking) stopped working, so they needed a new phone. Here follows a rant 1/n
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Martijn van Iersel @mpvaniersel.bsky.social · 06/11/2025
POV: you're a non-native developer in the Netherlands and you have to pronounce the word Buienradar 100x during your talk 😄 (No shade, it's a great talk by Neel Bhatt) #jfall
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Martijn van Iersel @mpvaniersel.bsky.social · 06/11/2025
This takes me back... I'm here to speak at #jfall. But Wageningen is also my alma mater you know...
Me in front of a train station
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Martijn van Iersel @mpvaniersel.bsky.social · 03/11/2025
Last week, me on stage speaking about #i18n-puzzles. Thanks for having me @tweakers.net developer summit!
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Martijn van Iersel @mpvaniersel.bsky.social · 09/10/2025
A recording of my #Devoxx talk is now available. youtu.be/XJMrMxlt-BQ?...
youtu.be
Fixing time zones for fun twenty programming puzzles to master internationalization by Martijn
YouTube video by Devoxx
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Martijn van Iersel @mpvaniersel.bsky.social · 07/10/2025
Tomorrow I'll be speaking at @devoxx.com about i18n-puzzles.com. Wish me luck! m.devoxx.com/events/dvbe2...
m.devoxx.com
Fixing time zones for fun - twenty programming puzzles to master internationalization. - Devoxx
By Martijn van Iersel. This talk reviews 20 internationalization puzzles on i18n-puzzles.com, tackling advanced time zone and Unicode challenges. It analyzes diverse solutions submitted by 300+ progra...
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Reposted by Martijn van Iersel
Brabant JUG @brabantjug.nl · 16/09/2025
@remcoder.bsky.social and Joep Weijers kicking of the gezelligste JUG of the Netherlands at TOPdesk!
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Martijn van Iersel @mpvaniersel.bsky.social · 03/06/2025
72h #GameJam time - coming weekend!
TINS 2025 Game Jam banner
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Martijn van Iersel @mpvaniersel.bsky.social · 01/04/2025
Tomorrow, I'm speaking at the #AmsterdamJUG about #i18n-puzzles www.meetup.com/amsterdam-ja...
meetup.com
Amsterdam JUG Meetup at Software Improvement Group (SIG), Wed, Apr 2, 2025, 6:00 PM | Meetup
Celebrating and preparing for the very first [Voxxed Days Amsterdam](https://amsterdam.voxxeddays.com/) taking place next day, April 3, join in with the latest Amsterdam JU
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Reposted by Martijn van Iersel
Ben Schwartz @lthummus.com · 27/03/2025
Speaking of programming, I finished all 20 puzzles in i18n-puzzles.com -- a collection of puzzles focused around localization. Learned a bunch of neat tricks -- some of which I hope not to have to deal with (like puzzle 19). Thanks to @mpvaniersel.bsky.social for putting them all together!
i18n-puzzles.com
Internationalization puzzles - Home
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Reposted by Martijn van Iersel
SiegeLord @siegelordex.bsky.social · 24/01/2025
I just released a new video game, BladeBlade 2! It was made for the KrampusHack 2024 gamejam, and has since received a few updates. All the art/music/code were made by myself using a custom engine powered by Allegro5. siegelord.itch.io/bladeblade2 #allegro #krampushack
siegelord.itch.io
BladeBlade 2 by SiegeLord
A platformer ARPG where you destroy elves using your Blade Blade.
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Martijn van Iersel @mpvaniersel.bsky.social · 09/03/2025
The word is spreading. Over 100 people have already tried the programming challenges at i18n-puzzles.com #i18n-puzzles
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Martijn van Iersel @mpvaniersel.bsky.social · 06/03/2025
Don't forget, it starts tomorrow! i18n-puzzles.com
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Martijn van Iersel @mpvaniersel.bsky.social · 02/03/2025
It's almost here! Six days before it starts. Really curious to see how many will join and how many will make it to the end! i18n-puzzles.com #i18n-puzzles #i18n #codingchallenge
i18n-puzzles.com
Internationalization puzzles - Home
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Martijn van Iersel @mpvaniersel.bsky.social · 20/02/2025
I created 20 programming puzzles 😀 The big reveal is in two weeks! Who's up for a challenge? i18n-puzzles.com #i18npuzzles #codingchallenge #programming #coding #i18n
Banner containing text "Programmers, do you fear time zones and encodings? You have seen nothing yet! i18n-puzzles.com"
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