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Waltteri

@waltteri.net
436 followers 580 following 725 posts

Finished a MSc in CS at University of Helsinki 🎉 Senior SWE at Cactos, battery energy storage systems. Previously Senior SWE at Garden, SRE at Webflow. Recreational computer graphics, Rust, photography, cycling. He/him. Mastodon (Twitter) @anotherwalther

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Waltteri @waltteri.net · 29/09/2026
"I have a two part question."
"1. What would you do if you were going to die?"
"And 2. How did you ever convince yourself you weren't?"
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Waltteri @waltteri.net · 29/09/2026
"Maybe the Earth would be better off without us."
"Safe and clean and perfect"
"like a toy nobody ever played with."
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Waltteri @waltteri.net · 25/09/2026
magic the gathering: reality fracture pre-release
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Waltteri @waltteri.net · 23/09/2026
new lens day! 23mm f/2.8 🥞
a fujifilm camera body lying on its back, with a little 23mm pancake lens on it. the entire thing would fit in a reasonably sized pocket (not one of the tiny fake ones). on the left lies a 90mm lens on its side, looming larger than the camera itself, at six time the weight compared to the new little guy
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Waltteri @waltteri.net · 20/09/2026
Kamppi Health and Well-being Centre Olympus Mju-II, Kodak Portra 400
a white building with all sorts of round curves standing tall against a bright blue summer sky. the windows are tall, narrow slits scattered across the surface, reflecting the teal hues of the sky. a couple of unintentional light leaks add imperfections and character to the photo.
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Waltteri @waltteri.net · 20/09/2026
self-portrait, olympus mju-ii, portra 400
self-portrait, looking up at a round mirror.
the background has a bright blue summer sky and some wood paneling, splitting the frame diagonally. the mirror has a red edge, and i'm wearing a blue suit jacket with a white shirt in the middle of the reflection.
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Waltteri @waltteri.net · 15/09/2026
heavensward complete!
"A dawn of liberation. A gathering storm of blood."
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Waltteri @waltteri.net · 08/08/2026
we have eldrazi at home
Eldrazi Conscription
Enchanted creature gets +10/+10 and has trample and annihilator 2
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Waltteri @waltteri.net · 04/07/2026
nightclub time! time for this unc to get some untz
poster of Post Bar in Helsinki
a drawing of a tired looking person lighting a tiny campfire on a green background, with large stylized lettering of "post bar" in red running down the right edge
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Waltteri @waltteri.net · 09/06/2026
borrowing a slightly older book from the library: opticks by sir isaac newton foreword? albert einstein (the original is from 1704, this print is from 1952. libraries are cool 🧡)
Opticks - or a treatise of the reflections, refractions, inflections & colours of light

Sir Isaac Newton

based on the fourth edition London, 1730
with a foreword by Albert Einstein
an introduction by Sir Edmund Whittaker
a preface by I. Bernard Cohen
and an analytical table of contents prepared by Duane H. D. Roller
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Waltteri @waltteri.net · 30/05/2026
club time! 🎶
candlelit pic of a club mate bottle with a shot of dark rum in it
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Waltteri @waltteri.net · 27/05/2026
Maistuisiko älykäs kalifornian valikko?
kuva kaupan valmiiksi pakatusta sushilajitelmasta, tekstikentässä lukee nimenä "älykäs kalifornian valikko"
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Waltteri @waltteri.net · 21/05/2026
I keep coming back to this passage in Robert Nystrom's book Crafting Interpreters. We need more of this 🧡
Ever since I learned to program as a kid, I felt there was something magical about languages. When I first tapped out BASIC programs one key at a time I couldn't conceive how BASIC itself was made. Later, the mixture of awe and terror on my college friends' faces when talking about their compilers class was enough to convince me language hackers were a different breed of human-some sort of wizards granted privileged access to arcane arts. It's a charming image, but it has a darker side. I didn't feel like a wizard, so I was left thinking I lacked some inborn quality necessary to join the cabal. Though I've been fascinated by languages ever since I doodled made-up keywords in my school notebook, it took me decades to muster the courage to try to really learn them. That "magical" quality, that sense of exclusivity, excluded me. When I did finally start cobbling together my own little interpreters, I quickly learned that, of course, there is no magic at all. It's just code, and the people who hack on languages are just people. There are a few techniques you don't often encounter outside of languages, and some parts are a little difficult. But not more difficult than other obstacles you've overcome. My hope is that if you've felt intimidated by languages and this book helps you overcome that fear, maybe I'll leave you just a tiny bit braver than you were before. And, who knows, maybe you will make the next great language. Someone has to.
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Waltteri @waltteri.net · 07/05/2026
hype!
"to preserve the dawn's light, the heroes journeyed north""their hearts filled with hope and eyes fixed heavensward"
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Waltteri @waltteri.net · 17/03/2026
call and raise www.reddit.com/r/BadMtgComb...
Magic: The Gathering card "Zimone, All-Questioning". The rules text on the card requires knowing whether numbers are prime
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Waltteri @waltteri.net · 24/01/2026
terrible no-good hasty sketches, playing around the idea of "you need to decide if you want this to be square or long, and commit to it" the right bottom is getting closer to my vision of a long variant, and the left square could experiment with nested r's or optional decoration for the empty spot
rough sketches of possible alterations to the wordmark. the first variant is decidedly more square, splitting the ferri and lab to two rows. four other variants are elongated, and play around with the letter packing and the length of the prongs of the F.
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Waltteri @waltteri.net · 16/01/2026
Magic the Gathering: Lorwyn Eclipsed prerelease pack, on top of a Miirym playmat
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Waltteri @waltteri.net · 05/01/2026
Good morning from Helsinki! A bit chilly here ❄️
-17 celsius, feels like -20
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Waltteri @waltteri.net · 06/12/2025
techno club time!
black and white photo of a curved mirror reflecting the door of the club, with a black poster with the rules written in white text. club kaiku, finland
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Waltteri @waltteri.net · 03/11/2025
Tietoinen tyylivalinta, samaan henkeen kuin puheenvuoron voi aloittaa "arvoisat kuulijat" tai "moikka" riippuen yleisöstä ja kontekstista. Pikatiivistys kuvankaappauksessa muualta. Kyseinen kirja odottaa omassakin hyllyssä sopivaa lukuhetkeä!
A comment from Reddit user 
GaiusOctavianAlerae

It’s about indicating tone and register. Texting someone “hello” vs “Hello” vs “Hello.” can have different impacts.

It’s not about laziness, by the way. Since people’s phones automatically capitalize the first letters of sentences they’re often going to extra effort to decapitalize things.

I highly recommend Because Internet by Gretchen McCulloch for more on the evolution of language on the Internet.
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Waltteri @waltteri.net · 28/10/2025
Python Software Foundation showing how it's done - let's give them some positive feedback 🧡 psfmember.org/civicrm/cont...
Payment confirmation to Python Software Foundation, 25 USD + processing fees
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Waltteri @waltteri.net · 20/10/2025
If you: 1) visit Oulu, Finland 2) enjoy occasionally eating meat 3) enjoy spicy food I highly recommend visiting Kauppuri5 for a burger and some of their hot sauces!
It's a beast of a feast! This burger has blown up, the buns are gone and the salad is all over the plate. With the title "butcher's salad", it's the wheatless version of their perhaps most famous burger (the butcher).

Ingredients in their own words: "Bacon, Beef patty, Over night braised pulled pork and roast beef, Cheddar cheese, salad bed with mustard vinaigrette, Red Onion, Kauppuri 5 BBQ Sauce".

In the background, there's a small bowl of fries and an unassuming-looking but terrifyingly terrific dip sauce based on Naga Morich, a chili pepper that once held the world championship title on spiciness. Incredible and incredibly hot, even for a chili enthusiast! Served with a tasteful glass of IPA.

The place looks a bit grungy, with hand-drawn art and signatures from people famous and ordinary scribbled all over the walls, and their outdoor sign has the motto "curing and getting hangovers since 2010".

If that sounds like an experience you'd like to try, maybe visit Oulu?
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Waltteri @waltteri.net · 07/07/2025
Degree Certificate: Master of Science
University of Helsinki, Faculty of Science
Master's Programme in Computer Science
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Waltteri @waltteri.net · 06/07/2025
www.asofterworld.com/clean/duo.jpg
the strip "pretty and pointless" from the webcomic a softer world.

"Maybe the Earth would be better off without us. Safe and clean and perfect like a toy nobody ever played with"
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Waltteri @waltteri.net · 07/06/2025
the 40-card deck i built for this limited event. green and black with some ramp, +1/+1 counters, and some job select artifacts
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Waltteri @waltteri.net · 07/06/2025
the list of cards opened from the set. big value item: "summon bahamut" in alternate art
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Waltteri @waltteri.net · 07/06/2025
final fantasy prerelease event for magic the gathering
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Waltteri @waltteri.net · 22/05/2025
SUBMITTED MY MASTER'S THESIS IN COMPUTER SCIENCE! 🎉
Screenshot from the thesis submission system at University of Helsinki, with a large text DONE! surrounded by virtual confetti flying around
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Waltteri @waltteri.net · 30/04/2025
Hauskaa Vappua! 🍾
Vappu celebrations in Helsinki - lots of people with their student caps in the air, as the Havis Amanda statue is getting her student cap placedCelebrations continue at the stairs of the nearby church building - time to open the champagne!
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Waltteri @waltteri.net · 27/04/2025
Time to re-read a wonderful classic 🧡
Screenshot from the webcomic Digger by Ursula Vernon. A slightly confused wombat is asking: "A pervert? Me? Uh-- Err-- Umm-- Yes! Absolutely!"
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Waltteri @waltteri.net · 15/04/2025
Starting the cycling commute season!
Bright orange bike with a pannier bag, and my shadow silhouette in the background
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Waltteri @waltteri.net · 15/04/2025
Behind the scenes
Two lighting stands, one with a softbox and one with an umbrella, and a tripod with the camera between them. On top of a stool is a flowerpot turned upside down, with a bunch of carnations sitting in the metal container that came with my immersion blender. Photography is all about creatively making things work 😄
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Waltteri @waltteri.net · 15/04/2025
Tulip #bloomscrolling
A single white tulip against a gray background. The stem is curved, bending clockwise. The petals are starting to open.
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Waltteri @waltteri.net · 15/04/2025
Carnation #bloomscrolling
A single white carnation against a gray background. The petals are wide open, creating a fluffy appearance.
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Waltteri @waltteri.net · 11/04/2025
I am now 100000 years old! 🎉 (or 32 in decimal) If you want to join in on the festivities, please share some of your favorite flowers and plants 🧡 Tulips are one of my favorites, especially in simple colors - minimalist design look 🌷
A single white tulip between four green leaves. The arrangement almost looks like a hand with fingers, with the flower as the pointer
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Waltteri @waltteri.net · 03/04/2025
Geared up for an after work photoshoot - coworkers get new profile pictures, I get subjects, win-win!
Photography gear leaning against a wall. Godox QR-P90 softbox, Manfrotto lighting stand carrying bag, and Peak Design everyday backpack. There's also a hidden canvas bag with more stuff outside the frame!
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Waltteri @waltteri.net · 01/04/2025
hi, computer expert here! this is not funny, networks only do this in extreme distress.
Finnish Communication and Internet Exchange statistics page showing the traffic graph for Telia, one of the large ISPs in Finland, with a sharp cliff from roughly 5Gbps to zero
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Waltteri @waltteri.net · 30/03/2025
Yet another example of flawed understanding of consent in apps
Rate the app
If you enjoy using Tsumego Pro, please take a moment to rate it on the App Store.
OK
Remind me later
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Waltteri @waltteri.net · 26/03/2025
First attempt at Glyphica: Typing Survival. Survived the first two bosses, fell on the third. Not a bad start I guess?
You survived for 05:49:11
Words per minute: 113
Accuracy 96%
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Waltteri @waltteri.net · 25/03/2025
terribly sorry for the idea as well as the execution
the same two placards as above, with red backgrounds and white engraved text, now with slight edits. the texts now read: "no human farts inside" and "no non-human farts inside". very clever, very mature 😅
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Waltteri @waltteri.net · 22/03/2025
Helsinki casual go tournament! Already lost my first game, now it's time for lunch before the next two rounds 🧡
a wooden go board with two wooden bowls for the stones on top of it and a game clock next to it. in the background are more boards and accessories, surrounded by bookshelves
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Waltteri @waltteri.net · 07/03/2025
early bird gets the worm - and some errands done! my head is now lighter by a bunch of hair and one tooth 🦷 hopefully the WIS -1 debuff doesn't affect my working day too much!
selfie time! it's me, a 31yo white guy with blonde hair and a new relatively short haircut, stylized to be a bit airy and poofy with wax. the background is a beautiful purple from one of the local trains.
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Waltteri @waltteri.net · 02/03/2025
A couple of photos from yesterday's walk
a small round window on a wall consisting of very narrow wooden panels. the panels are fastened with tiny nails, in fairly organic rows, waving up and down, and not always completing a full rowa heavily rusted metal bollard next to the water at a harbor. only a few specks of the original yellow paint remain. the bollard has two arm-looking appendages. right next to the bollard, from between the cobblestones, a tiny plant is growing and extending its own branches.architectural photo. repetitive structures, abstract. square windows with large white panels. dark grey rectangular granite slabs at the bottom, with a diagonal tilt. the blue sky tones reflecting from the windowpanes is contrasted by the orange-brown wood details.architectural photo. widescreen crop. a total of 18 square windows in a six by three arrangement on a building wall, each with wide white panel margins between them and orange-brown wood details in their frames. there's a balance between the high structural symmetry of the building outside and the organic differences in what is showing in each window, both in the reflections as well as what is seen through the panes. the color palette consists of muted white, dark blue/teal, and an orange brown.
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Waltteri @waltteri.net · 26/02/2025
lwn.net/Articles/101...
Screenshot from LWN.net

"The conversation around the merging of a set of Rust abstractions for the kernel's DMA-mapping layer has mostly settled after Linus Torvalds made it clear that the code would be accepted. One other consequence of this decision, though, is that Christoph Hellwig has quietly stepped down from the maintenance of the DMA-mapping code. Marek Szyprowski will be the maintainer of that layer going forward. Hellwig has maintained that code for many years; his contributions will be missed."
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Waltteri @waltteri.net · 24/02/2025
Pretty happy with my hydra deck!
screenshot from mtg arena. the opponent has just died with their life total at negative 672. on the battlefield on my side are, among other things, doubling season enchantment, and two mossborn hydras. one hydra has power and toughness of 594/594, the other is 72/72
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Waltteri @waltteri.net · 09/02/2025
Got pretty far in Endless mode while at it 🧡
Balatro game over
Best hand 1100137
Most played hand Flush
Ante 11 Round 29
Seed NIRQLUJX
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Waltteri @waltteri.net · 09/02/2025
I won the game!
Balatro win screen
Best hand 514181
Most played hand Flush
Ante 9 Round 22
Seed NIRQLUJX
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Waltteri @waltteri.net · 08/02/2025
That was fun! No idea if this was great or terrible for the first run, got defeated at ante 5 by the big boss The Fish
Balatro defeat screen, game over! Ante 5 Round 12, cards played 122, cards discarded 70, cards purchased 15, times rerolled 0, new discoveries 29, seed TUTORIAL.
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Waltteri @waltteri.net · 08/02/2025
👀
Screenshot of the intro of the video game Balatro
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Waltteri @waltteri.net · 07/02/2025
Inside view of a Finnish sauna. Wooden plank walls, hot sauna stove in the corner, water being thrown onto its rocks with a ladle, and a can of pear soda sitting on a wooden arm rest. Beer is customary, went with something sweeter and non-alcoholic this time!
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