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Sean Killeen

@seankilleen.com
1.5K followers 857 following 1.3K posts

A mind at work. 💼 VP, Innovation and Products at SCT Software 🥇 Microsoft #MVP 📣 Organizer of #dotnetdc ✔️ Docs lead / Core Team member of the #NUnit project ♾️ Agility, DevOps, smaller loops 🌎 Kindness, empathy, humanity

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Sean Killeen @seankilleen.com · 27/09/2026
Thank you!
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Sean Killeen @seankilleen.com · 27/09/2026
What is your preferred nasal passage opener? I've seen some advertised on Instagram and am very interested, but it's hard for me to tell which ones are legit.
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Sean Killeen @seankilleen.com · 26/09/2026
I can still remember a steak meal I had in Argentina probably almost 15 years ago. Jealous of you (but hope you enjoy!)
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Sean Killeen @seankilleen.com · 26/09/2026
Friday night is typically when administrations do the things they're proudest of, right?
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Sean Killeen @seankilleen.com · 24/09/2026
Psst if you're returning an HTTP 5xx error but the error message is about validation findings on the input, you probably want that to be a 4xx error. #HowIsThisStillAThing
static.klipy.com
The More You Know
Alt: "The More You Know", text speeding through space on a star with a rainbow as a sort of trailing comet-style tail. A clip from 90s-era public service announcements / programming.
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Sean Killeen @seankilleen.com · 21/09/2026
Other airports are just jealous because we're already leading the "people killed by major airline incidents" race in the last two years. Just trying to strengthen that lead.
A popular meme, "is this a butterfly", but the butterfly is airline risk And the caption reads "is this winning?"
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Sean Killeen @seankilleen.com · 21/09/2026
Cool cool cool the airport that's 15 minutes from my house 😬
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Sean Killeen @seankilleen.com · 21/09/2026
If you are developing and running a cloud-based product in production, in 2026, and you are unable to detect a major loss of functionality and communicate it clearly to consumers, you are unprofessional. Full stop.
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Sean Killeen @seankilleen.com · 20/09/2026
Definitely read this as "Weird Al" (as in Yankovic) and had a nice chuckle.
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Sean Killeen @seankilleen.com · 20/09/2026
I think devs tend to make these things into big events, but this was easy and minimal. Truly a non-event. Happy to support tooling we get value from. Cheers, @simoncropp.bsky.social! 🍻
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Sean Killeen @seankilleen.com · 20/09/2026
* I sponsored the project via GitHub sponsors on behalf of our org. * Followed the clear instructions to update the dependency and add our sponsorship info. * Voila! All done. I mention this because good tools deserve funding if that's what they think they need, and Verify adds a ton of value.
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Sean Killeen @seankilleen.com · 20/09/2026
* Teammate updated our dependencies, and saw the build broke for Verify * Noted that Verify added the OSMF * Added an item to our weekly roundtable meeting * We discussed options: pay $240/yr, do without those tests, or rewrite them. * ROI immediately evident. Team voted to keep.
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Sean Killeen @seankilleen.com · 20/09/2026
An easy decision this week: our team handily voted to keep and pay the OSMF for @simoncropp.bsky.social's Verify .NET. Verify is a snapshot testing tool/ecosystem and it's great. Here's how it went down: #dotnet #oss #osmf
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Mar Hicks @histoftech.bsky.social · 19/09/2026
Precisely this—the power attributed to technology makes it incredibly useful for laundering responsibility
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Sean Killeen @seankilleen.com · 19/09/2026
Bonus: birthday free scoop of ice cream! Triple bonus: the birthday scoop was actually 3 scoops! Today is winning.
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Sean Killeen @seankilleen.com · 19/09/2026
The best recovery from an insane work week: neighborhood Celtic fest! I am eating Shepherd's pie and drinking a Smithwicks in the middle of a beautiful day. Perfect.
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Sean Killeen @seankilleen.com · 18/09/2026
Revisited my blog post series from 7 (?!) years ago today, I'm really happy with how well it's held up. Do you run interviews? You might find it useful. seankilleen.com/2019/09/bett...
seankilleen.com
Better Technical Interviews: Part 1 – What’s the point?
This post is part of a series I’m writing on better technical interviews. I’d love your feedback in the comments! Part 1 - What’s the Point? Part 2 - Preparation Part 3 - The Actual Interview ...
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Sean Killeen @seankilleen.com · 18/09/2026
Just dusted off a process I created and automated 2+ years ago, in about 10 minutes. Will save dozens of hours for the teammate using it. A nice win for a Friday. 🎉
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Sean Killeen @seankilleen.com · 17/09/2026
They're not outsourcing the decisions so much as attempting to outsource the accountability. Innocent people will die because of this, and blame will be avoided, unless we ensure it's not.
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Sean Killeen @seankilleen.com · 14/09/2026
"A <blink> tag? Oh for fuck's sake!"
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Sean Killeen @seankilleen.com · 11/09/2026
It's so good! I absolutely love mine. The external cable has recently gotten a little finicky and I'm considering contacting them for a replacement since I'm not tough on it at all. But it is *delightful* to use.
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Sean Killeen @seankilleen.com · 09/09/2026
You should be able to cross one off -- didn't you already dominate the Post? 😆
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Sean Killeen @seankilleen.com · 09/09/2026
Very close to launching a product. Trying to make my own path in the world independently for the freedom, opportunity, and learning that comes with it.
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Sean Killeen @seankilleen.com · 09/09/2026
CW: Alcohol I treated myself to a birthday present tonight: a scotch I'd been staring at for a long time but just couldn't justify. :) Balvenie Portwood 21. Absolutely *delightful*. Everything I personally could want in a scotch. An experience. 40, we'll get along just fine I think.
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Sean Killeen @seankilleen.com · 09/09/2026
Congratulations! 🎉
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Keith Law @keithlaw.bsky.social · 08/09/2026
once again, this should be front-page news all over the world, the President of the USA just fabricated an entire story about himself
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Sean Killeen @seankilleen.com · 08/09/2026
Ringing in a new decade today. A good reminder that we never get it back. Onward!
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Sean Killeen @seankilleen.com · 06/09/2026
Thread numbering is a lovely, well-done feature. Thanks @bsky.app!
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Sean Killeen @seankilleen.com · 06/09/2026
Still, I do owe @bitnami.bsky.social a thanks. They got us up and running quickly in the beginning which allowed me to get our product's legs under it without worrying about that part of the ecosystem. Just wish it could have gone better, since there was so much room for it to.
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Sean Killeen @seankilleen.com · 06/09/2026
You guessed it -- they started removing all the chart source from their repositories, like they said they wouldn't. This was a surprise and left us stranded with stuff we couldn't update. I offered to pay. I put in the time. And still got hosed.
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Sean Killeen @seankilleen.com · 06/09/2026
I had weeks of discussions with Bitnami. I offered to pay a reasonable fee for our usage/org size (their fee would be 50% of our entire infra). Conclusion: we could fork the repo and add our own build process, since the charts would remain available. I invested a lot of time to do that right. Welp.
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Sean Killeen @seankilleen.com · 06/09/2026
Almost done ripping out our @bitnami.bsky.social usage after they burned all their OSS goodwill and tried to charge us $60k/year to use 3 helm charts. Will feel good to be rid of them. Another great project torched by enterprise capture.
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Sean Killeen @seankilleen.com · 05/09/2026
Actively investigating moving our business plan. Slightly more complex but worth it. Wish I'd been more aware of the history; I missed it prior to the donation.
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Steve Brazill @stevebrazill.com · 05/09/2026
Another important post you should read from @masnick.com. TLDR: Age verification is bad. Longer TLDR: Avoid having your ID scanned for any reason. www.techdirt.com/2026/09/03/h...
techdirt.com
Hackers Had A Live Feed Of Every ID This Verification Company Scanned. For Over A Year.
From the very beginning of this recent obsession with identifying everyone online (yes, they like to call it "age" verification, but it always ends up as identity verification), we've been pointing out that it was a huge privacy nightmare waiting to happen. Or maybe it wasn't waiting. Maybe it was already happening. This week a...
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Sean Killeen @seankilleen.com · 03/09/2026
FWIW I'm actively investigating moving our corporate subscription. Hoping others will too. If I do move it, I'll write about how so that others might take the same path. (most of our inertia is around the way we use the product, BitWarden looks to be good competition there)
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Sean Killeen @seankilleen.com · 03/09/2026
I appreciate your honest summary of DHH's comments. Too many outlets afraid to call a spade a spade.
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Sean Killeen @seankilleen.com · 03/09/2026
Solid list.
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Sean Killeen @seankilleen.com · 03/09/2026
✅ Enjoy your Pho :)
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Sean Killeen @seankilleen.com · 03/09/2026
Will be interesting to see who recovers 1Password's fumble. Looking like BitWarden will do well. Their devops tooling and kubernetes operator seem poised to make transition easier for businesses as well.
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Sean Killeen @seankilleen.com · 03/09/2026
It's a heavier lift but I'm actively investigating moving our enterprise instance. I wrote them and their response was basically "we're supporting OSS!" As a developer for 20+ years and advocate of OSS I asked them to please not treat customers like idiots on top of it. Insult to injury.
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spooky tail latency @bluespacecanary.bsky.social · 03/09/2026
incredible work by 1PW leadership fucking up bad enough that a fight over Arch Linux for Racists escaped containment so completely that now Jamelle Bouie's telling 750k very online millennials, almost certainly the demographic most likely to pay for 1PW, to go cancel their 1PW subscription tonight
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Sean Killeen @seankilleen.com · 03/09/2026
They've done this for a while. Annoyed the heck out of me too. You can turn off most of it I think. Can confirm that it doesn't impact my day to day usage. But I still gave them the feedback that it's very silly.
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Sean Killeen @seankilleen.com · 02/09/2026
✅
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Marisa Kabas @marisakabas.bsky.social · 01/09/2026
I was nominated for an award and today is the last day to vote! Help me win and go vote for The Handbasket!
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Sean Killeen @seankilleen.com · 01/09/2026
YIKES. Thank you for making me aware of this; I somehow missed it. We're a 1Password Enterprise customer and I own the vendor relationship. Just e-mailed them to voice how irate I am about this.
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Sean Killeen @seankilleen.com · 31/08/2026
A "deal"? What an embarrassment for NPR to print this.
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Sean Killeen @seankilleen.com · 30/08/2026
Weirdly, in its price hike announcement FAQ to customers, @atlassian.bsky.social doesn't answer "hey, didn't you fire 10% of your staff for AI? Why didn't that prevent a price increase?"
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Sean Killeen @seankilleen.com · 30/08/2026
Random thought: JDD - Joneses Driven Development. Where AI leaders make you think everyone is doing it, so you also try to do it, and the AI leaders get your money (a lot of it) Evolve things from your own context. Seek to improve from where you are. Gall's Law is still a thing.
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Sean Killeen @seankilleen.com · 30/08/2026
Having laryngitis is not very compatible with being Dad to a 6yo. But I do have one more reason to be glad that he's a great reader!
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Sean Killeen @seankilleen.com · 29/08/2026
This latest illness has been bonkers. 2 days of 102 degree fever / chills etc. and now... laryngitis? Weird.
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