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Simon de Haan

@sdehaan.bsky.social
71 followers 66 following 36 posts

Turn.io Co-Founder & CTO.

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Simon de Haan @sdehaan.bsky.social · 23/11/2025
Didn’t think I’d ever say this but, be a Batman in your field.
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Simon de Haan @sdehaan.bsky.social · 19/11/2025
It was not! blog.cloudflare.com/18-november-... Impressed by their ability to get a detailed post mortem out so fast.
blog.cloudflare.com
Cloudflare outage on November 18, 2025
Cloudflare suffered a service outage on November 18, 2025. The outage was triggered by a bug in generation logic for a Bot Management feature file causing many Cloudflare services to be affected.
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Simon de Haan @sdehaan.bsky.social · 18/11/2025
I bet it’s gonna be DNS again. #cloudflare
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Simon de Haan @sdehaan.bsky.social · 12/11/2025
Moved to Elixir 1.19 in production. Total non-event. #elixirlang
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Simon de Haan @sdehaan.bsky.social · 30/10/2025
Hit off-by-1 errors in timing related tests when upgrading to Elixir 1.19. Turns out DateTime.diff changed subtly, it used to drop microseconds (everything rounded to seconds), now keeps them. Our tests relied on old behavior without realizing it. Hopefully saves ppl some debug time! 😅 #ElixirLang
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Simon de Haan @sdehaan.bsky.social · 28/10/2025
Things that are unreasonably hard when running systems at scale: counting stuff accurately
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Simon de Haan @sdehaan.bsky.social · 12/08/2025
I would like to see a new benchmark on how well different LLMs are able to diagnose issues raised by Dialyzer. #myelixirstatus #elixir
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Simon de Haan @sdehaan.bsky.social · 10/06/2025
www.inkandswitch.com/essay/mallea... 🫶🏻
inkandswitch.com
Malleable software: Restoring user agency in a world of locked-down apps
The original promise of personal computing was a new kind of clay. Instead, we got appliances: built far away, sealed, unchangeable. In this essay, we envision malleable software: tools that users can...
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Axel Wicke @elziax.bsky.social · 04/06/2025
Wat heeft Faber nou eigenlijk bereikt? Dagblad @trouw.nl: Enkel dat de bestempeling van kwetsbare mensen tot zondebokken voor alles, hun reducering tot cijfers en “gelukszoekers” en het illegale afpakken van mensenrechten nu als normaal beleid beschouwd worden. En niet meer als moreel schandaal.
Artikel in dagblad trouw: “De mensen om wie het ging verdwenen onder Faber uit het zicht”, de titel.Artikel in dagblad trouw: “De mensen om wie het ging verdwenen onder Faber uit het zicht”, deel 1.Artikel in dagblad trouw: “De mensen om wie het ging verdwenen onder Faber uit het zicht”, deel 2.
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Bas Vermond @basvermond.bsky.social · 03/06/2025
Schrijnende constatering.
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Fly.io @fly.io · 03/06/2025
🧠 Both AI optimists and pessimists are missing the point. The real conversation should be about how we build trustworthy systems—not about sentience or superintelligence. Let's focus on practical risks and benefits instead of sci-fi scenarios. 🔗 ➡️ fly.io/blog/youre-a...
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Mina Kimes @minakimes.bsky.social · 30/05/2025
Musk should be asked about this in every interview he does now and forever. To ignore it is a dereliction of duty. www.nytimes.com/2025/05/30/o...
There is one place, however, where Musk, with the help of his minions, achieved his goals. He did indeed shred U.S.A.I.D. Though a rump operation is now operating inside the State Department, the administration says that it has terminated more than 80 percent of U.S.A.I.D. grants. Brooke Nichols, an associate professor of global health at Boston University, has estimated that these cuts have already resulted in about 300,000 deaths, most of them of children, and will most likely lead to significantly more by the end of the year. That is what Musk’s foray into politics accomplished.
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Simon de Haan @sdehaan.bsky.social · 26/05/2025
tfw design is your passion and there's a job opening @ turn.io for a senior product designer www.turn.io/careers/seni...
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jamelle @jamellebouie.net · 22/05/2025
i think it should be a bigger story that the president held a meeting with a foreign head of state where he ranted about the most gutter white supremacist propaganda you can find on the internet
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Simon de Haan @sdehaan.bsky.social · 21/05/2025
Yesterday’s 20 hour turn.io unintentional load test was compliments of a customers infinite http request loop!
turn.io
Chat for impact | Turn.io
An impactful conversation at a key moment can change a life. Turn.io is a chat platform to build services that improve millions of lives.
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Simon de Haan @sdehaan.bsky.social · 13/05/2025
nos.nl/l/2567077 man met auto in de file klaagt over het file probleem.
nos.nl
Omtzigt bij afscheid: politiek onvoldoende bezig met echte problemen
Het "giftige politieke klimaat" is de scheidend NSC-leider ook steeds meer gaan tegenstaan.
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Simon de Haan @sdehaan.bsky.social · 08/05/2025
This is incredible. Even the work required to deploy that much money is mind boggling www.gatesnotes.com/n20-years-to...
gatesnotes.com
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Simon de Haan @sdehaan.bsky.social · 08/05/2025
It’s entertaining to me that our Turn.io app is the most network distributed application I’ve ever been part of building while also the largest monolith. Thanks to #elixirlang microservices aren’t a tax worth paying or even make sense to consider from an architecture standpoint.
turn.io
Chat for impact | Turn.io
An impactful conversation at a key moment can change a life. Turn.io is a chat platform to build services that improve millions of lives.
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Simon de Haan @sdehaan.bsky.social · 10/04/2025
🎯
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Simon de Haan @sdehaan.bsky.social · 10/04/2025
Seeing these types of comments by @josevalim.bsky.social on Github discussions spark joy and joy is contagious. #myelixirstatus
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Simon de Haan @sdehaan.bsky.social · 10/04/2025
Current Slack status:
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Kelsey Hightower @kelseyhightower.com · 07/04/2025
I can only imagine the bailout package they are drawing up for themselves. As the saying goes, privatize the profits, and socialize the losses.
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Simon de Haan @sdehaan.bsky.social · 05/04/2025
Reminds of growing up in countries where having the picture of the president or other persons of authority visibly present at your place of business or work was a requirement. Performative signs of loyalty just to keep afloat. 🚩
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Simon de Haan @sdehaan.bsky.social · 03/04/2025
Go Julia!!! 🙌 🙌
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Simon de Haan @sdehaan.bsky.social · 02/04/2025
One of my favourite errors in tests: 1st of the month off by 1 errors and daylight savings time off by 1 errors
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Alchemy Conf @alchemyconf.com · 17/03/2025
Want a spoiler on Julia Mathias' talk? Here it is 👀 #AlchemyConf #MyElixirStatus #ElixirLang
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Antonie C. Fountain @antonie.bsky.social · 30/03/2025
Kleinzerig. Zuur. Volstrekt een minister onwaardig. nos.nl/l/2561674
nos.nl
Faber geeft geen goedkeuring voor lintjes COA-medewerkers
"Hun werk staat haaks op mijn beleid", zegt de minister. En daarom wil ze niet haar handtekening zetten onder de voordracht.
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Chris Hayes @chrislhayes.bsky.social · 26/03/2025
“We are currently clean on OPSEC” accidentally sent to a journalist is an all time classic.
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Alchemy Conf @alchemyconf.com · 16/03/2025
🎙️ @luiszamith.bsky.social spoke with Julia Mathias, an engineer who built her entire career with Elixir—from junior to now. One of the first, surely not the last! She’ll be at #AlchemyConf sharing her journey. www.youtube.com/watch?v=rsbJ... #ElixirLang #MyElixirStatus
youtube.com
A Chat with Julia Mathias - Building a career in Elixir from the start!
Zamith had the chance to speak with Julia Mathias, an engineer that has built her entire career working with Elixir, from a junior position to where she is n...
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luokai @luok.ai · 13/03/2025
Have you ever thought about interacting with Blender and controlling it directly through Claude, enabling prompt - based 3D modeling, scene creation, and manipulation? BlenderMCP is a tool that connects Blender with Claude AI via the Model Context Protocol (MCP).
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Armin Ronacher @mitsuhiko.at · 13/03/2025
The main consequence of this AI stuff is that there is already a premium on human interactions and it will only grow.
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MIЯIΛM 🤔 @mirificare.bsky.social · 10/03/2025
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Joel Siegel @joelsiegel.bsky.social · 04/03/2025
This is quite a kicker in Thomas Edsall’s latest op-ed. www.nytimes.com/2025/03/04/o...
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Richard Branson @richardbranson.bsky.social · 04/03/2025
(3/3) With decades of Western policy consensus callously swept aside, European nations must now do everything within their power to preserve Ukraine’s sovereignty and repel Russia’s aggression.
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Richard Branson @richardbranson.bsky.social · 04/03/2025
(2/3) The UK government is doing its best to live up to this commitment, but the US is effectively siding with Russia in undermining it. Instead of seeing its sovereignty preserved, Ukraine is being pressured to accept a lopsided peace agreement without real guarantees.
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Richard Branson @richardbranson.bsky.social · 04/03/2025
(1/3) It needs repeating: in 1994, Ukraine was persuaded to give up its nuclear weapons to Russia in return for the US, the UK, and Russia guaranteeing Ukraine’s sovereignty, security, and territorial integrity.
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Simon de Haan @sdehaan.bsky.social · 28/02/2025
Elect clowns, expect a circus.
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Brian Boland @btb.bsky.social · 28/02/2025
Many Americans, deeply frustrated with a government that has failed to deliver for them, have indicated for years that they wanted to burn the system down. They are getting their wish and the consequences are dire. www.theatlantic.com/politics/arc...
theatlantic.com
At Least Now We Know the Truth
It’s ugly, but necessary to face.
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Samrat Man Singh @samrat.me · 20/02/2025
I wrote up a post on how you can run AI models on Elixir that aren't yet supported by Bumblebee samrat.me/running-ml-m... #MyElixirStatus #ElixirLang
samrat.me
Running ML models in Elixir using Pythonx
I just discovered Pythonx, which runs a Python interpreter in the same OS process as Elixir. Looks like it also wraps uv so it sets up a virtual environment with all the Python dependencies your code...
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Adolfo Neto @adolfoneto.elixiremfoco.com · 08/02/2025
Two Brazilian speakers: @hugobarauna.com and Julia Mathias plus an honorary Brazilian: Bruce Tate. I had the pleasure of meeting all three in person at Elixir events. #ElixirLang
Hugo and Julia
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Brian Boland @btb.bsky.social · 28/01/2025
So what's the alternative? Instead of chasing returns that perpetuate harm, we need to ask ourselves a more fundamental question: What kind of society do we actually want to create with our capital?
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Simon de Haan @sdehaan.bsky.social · 21/01/2025
Who would you recommend for an Engineering Manager position at Turn.io? We've got an open position available www.turn.io/careers/engi... . Help drive social impact by helping an amazing team of #elixirlang developers do their best work! #myelixirstatus
turn.io
Chat for impact | Turn.io
An impactful conversation at a key moment can change a life. Turn.io is a chat platform to build services that improve millions of lives.
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Simon de Haan @sdehaan.bsky.social · 08/01/2025
Moved Turn.io over to Elixir 1.18 -- thanks for making it so painless @elixir-lang.org !
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Simon de Haan @sdehaan.bsky.social · 18/12/2024
We're bullish on emerging markets & have got an opening for an EMEA/APAC Elixir engineer. If you like #elixirlang and are keen to use your skills at turn.io to help organisations power life improving conversations then make sure to apply turn.io/jobs/product... #myelixirstatus . Sharing widely is ❤️
turn.io
Turn.io's hiring: Product Engineer (Backend)
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