Jef Cλaes (@JefClaes) header
Jef Cλaes (@JefClaes) profile picture

Jef Cλaes

@JefClaes

Codeslinger, domain linguist and accidental infrastructure plumber.

 Trials of miles
jefclaes.be
Joined April 2009
  • Tweets20.4K
  • Following380
  • Followers1.6K
804Media
Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)Photo by Jef Cλaes (@JefClaes)
I peed my pants.
AWS Support (@AWSSupport) profile pictureAWS Support
@AWSSupportJul 17
📣 Service Update: AWS Billing Console We are investigating issues with Cost Explorer reflecting inaccurate estimated billing data. 📊 Track status: go.aws/aws-hd #AWS #AWSSupport
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I found one!!
Paul Bohm (@paulbohm) profile picturePaul Bohm
@paulbohmMay 8
If your startup does not have a UUID microservice you’re ngmi
Image from Paul Bohm (@paulbohm)
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Totally random but I published something on my blog (non-tech). jefclaes.be/2026/05/into-the… Reviving the blog after 8 years in 30 minutes instead of it requiring a weekend project helped I guess.

Into the middlegame

Early 2025, my oldest daughter came home from school and had learned to play chess. She was so excited about the game that she even asked a board as her birthday gift. I, on the other hand, had never...

jefclaes.be
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Imagine hypermedia had really taken off. Agents wouldn’t have been burning through tokens to reverse engineer the web. We built for humans, forgot about machines, and now spend a fortune teaching machines to pretend they’re human.
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Maybe this new found time will finally force me to pull that blog post on self similarity in supply chain from the back burner.
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Installed Twitter from my phone last week and had zero withdrawal symptoms. I remember when it was high speed thoughts exchange instead of feeding the algorithm.
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Bounded Buy - what a great word. thoughtworks.com/radar/techn…
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He wants to be Alibaba/WeChat/WePay.
Linda Yaccarino (@lindayaX) profile pictureLinda Yaccarino
@lindayaX23 Jul 2023
Replying to @lindayaX
There’s absolutely no limit to this transformation. X will be the platform that can deliver, well….everything. @elonmusk and I are looking forward to working with our teams and every single one of our partners to bring X to the world.
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Missed opportunity. @elonmusk
Image from Jef Cλaes (@JefClaes)
Image from Jef Cλaes (@JefClaes)
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Replying to @LucidSoftware
@LucidSoftware I have the impression "Always Show Slides" in the "Presentation Builder" stopped working?
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Dropping January 2024.
Image from Jef Cλaes (@JefClaes)
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Anyone have any battle scars from using Lambda with a Kafka event source?
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The list of everything I consumed in 2022. 26 books, 6 shows, 4 documentaries and 1 movie. github.com/JefClaes/consumed…
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I dreamed yesterday that I visited the office of my previous employer and that all new engineers working there were super thankful for all the code I had written there 😅
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Had to be done. @DDD_Borat
Image from Jef Cλaes (@JefClaes)
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Anyone have good reference material that captures in layman's terms why writing to kafka with a partition key to ensure deterministic stream processing matters a great deal?
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/s/lawyers/coders #DDDesign
Image from Jef Cλaes (@JefClaes)
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Last week, I served as a juror on a murder trial. Five days of 11 hours+ listening to testimonies and pleas to eventually co-decide on the fate of the defendant.
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I'm happy that the law provides us with a decision making framework that can be applied when someone takes away another person's most fundamental right; the right to live.
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Today in a meeting I learned that everyone at one point in time went to dinner with @mathiasverraes 🤔
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Anxious to go back to work tomorrow. How do I pick up my past life after two weeks in the mountains?
Image from Jef Cλaes (@JefClaes)
Image from Jef Cλaes (@JefClaes)
Image from Jef Cλaes (@JefClaes)
Image from Jef Cλaes (@JefClaes)
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