Sign in

Karel Zikmund

@zikicz.bsky.social
426 followers 141 following 57 posts

SW engineer on .NET Networking team at Microsoft. Hiring for .NET/DevDiv/Microsoft/Prague. Opinions are my own. He/him. karelz.github.io

PostsRepliesMedia
Reposted by Karel Zikmund
Morten Nielsen @dotmorten.xaml.dev · 08/01/2026
Developing with .NET MAUI? Share your feedback with the .NET MAUI team: www.surveymonkey.com/r/T9KJCTS
surveymonkey.com
Please tell us about your .NET MAUI development experience!
Take this survey powered by surveymonkey.com. Create your own surveys for free.
032
Reposted by Karel Zikmund
ACLU @aclu.org · 22/09/2025
Jimmy Kimmel was taken off the air after our government threatened a private company with retaliation, marking a dark moment for free speech in our nation. More than 400 artists across our nation signed on to say: We refuse to be silenced by those in power.
We the people must never accept government threats to our freedom of speech. Efforts by leaders to pressure artists, journalists, and companies with retaliation for their speech strike at the heart of what it means to live in a free country.

Last week, Jimmy Kimmel was taken off the air after the government threatened a private company with retaliation, marking a dark moment for freedom of speech in our nation. In an attempt to silence its critics, our government has resorted to threatening the livelihoods of journalists, talk show hosts, artists, creatives, and entertainers across the board. This runs counter to the values our nation was built upon, and our Constitution guarantees.

We know this moment is bigger than us and our industry. Teachers, government employees, law firms, researchers, universities, students and so many more are also facing direct attacks on their freedom of expression.

Regardless of our political affiliation, or whether we engage in politics or not, we all love our country. We also share the belief that our voices should never be silenced by those in power – because if it happens to one of us, it happens to all of us.

This is the moment to defend free speech across our nation. We encourage all Americans to join us, along with the ACLU, in the fight to defend and preserve our constitutionally protected rights.A graphic listing the names of the more than 400 signers of the ACLU's letter condemning the federal government's retaliation against Jimmy Kimmel. For the full list of signatories, visit aclu.org/kimmel-letter-bk
4934371040
Reposted by Karel Zikmund
Tom Deseyn @tomdeseyn.bsky.social · 16/07/2025
I published 'ssh': a .NET tool that mimics OpenSSH 'ssh' (built with Tmds.Ssh!) You can invoke it as 'dotnet ssh' after a tool install ('dotnet tool update -g ssh') or with .NET 10 p6's new 'dnx' command run: 'dnx ssh' @chethusk.bsky.social @jongalloway.bsky.social @zikicz.bsky.social @davidfowl.com
084
Reposted by Karel Zikmund
Tom Deseyn @tomdeseyn.bsky.social · 29/04/2025
2nd (and final) C# 13 post covers 'ref struct' improvements, the new 'Lock' type, and [OverloadResolutionPriority] developers.redhat.com/articles/202... cc @jongalloway.bsky.social @zikicz.bsky.social
developers.redhat.com
Some more C# 13 | Red Hat Developer
Learn more about the new advanced features of C# 13 (part 2 of 2)
053
Karel Zikmund @zikicz.bsky.social · 29/04/2025
Tech Talks for Universities are back -- watch today 4/29 at 19:15 CEST aka.ms/TechTalks4Unis
021
Reposted by Karel Zikmund
Tom Deseyn @tomdeseyn.bsky.social · 16/04/2025
Blog post on C# 13 params collections, partial properties/indexers, index access in object initializers and ref/unsafe in iterators and async methods developers.redhat.com/articles/202... @jongalloway.bsky.social @chethusk.bsky.social @zikicz.bsky.social @antonfrv.bsky.social @jaredpar.bsky.social
developers.redhat.com
C# 13 | Red Hat Developer
Discover the new features of C# 13 (part 1 of 2)
062
Karel Zikmund @zikicz.bsky.social · 13/04/2025
Yep, actively experimenting karelz.github.io/ai-interviews/ So far, we had 2 interviews, with 4 more to be scheduled. It is very different from what we envisioned - we need to finetune questions to not let candidates drown in debugging infra/env.
000
Karel Zikmund @zikicz.bsky.social · 28/03/2025
Oh, it was the magical setting in Notifications, darn ... my bad
010
Karel Zikmund @zikicz.bsky.social · 28/03/2025
Not too late. We're just getting started next week.
010
Reposted by Karel Zikmund
Karel Zikmund @zikicz.bsky.social · 01/03/2025
Using AI in interviews -- looking for volunteers for mock AI-enabled interviews. If you are proficient in using AI in your daily work (job, hobby projects, school work), and you'd like to try to use them also during interview, ping me. This is community-driven effort!
5129
Karel Zikmund @zikicz.bsky.social · 27/03/2025
Just noticed that replies to my post didn't give me any notification 😮‼️ Am I missing some obvious setting somewhere? (like by default disabled DMs)
240
Karel Zikmund @zikicz.bsky.social · 27/03/2025
So, just because I work for Microsoft, all my community/private efforts are doomed to be bad? ... Interesting
100
Karel Zikmund @zikicz.bsky.social · 27/03/2025
Argh, I somehow missed all replies (!) and had DMs disabled. Double fail. Emberassing. If you are still interested, please ping me (DM, or contacts on karelz.github.io). We are starting next week.
karelz.github.io
Karel Zikmund - About Me
000
Karel Zikmund @zikicz.bsky.social · 27/03/2025
Well, candidates are "cheating" with AI. And given that AI is a useful developer tool (like calculator is for math), it is just natural evolution, isn't it? Would you hire a mathematician who is refusing to use calculator?
100
Karel Zikmund @zikicz.bsky.social · 27/03/2025
Argh, I somehow missed all replies (!) and had DMs disabled. Double fail. Emberassing. If you are still interested, please ping me (DM, or contacts on karelz.github.io). We are starting next week.
karelz.github.io
Karel Zikmund - About Me
000
Karel Zikmund @zikicz.bsky.social · 27/03/2025
Argh, I somehow missed all replies (!) and had DMs disabled. Double fail. Emberassing. If you are still interested, please ping me (DM, or contacts on karelz.github.io). We are starting next week.
000
Reposted by Karel Zikmund
Armin Ronacher @mitsuhiko.at · 12/03/2025
This comment by Anders Hejlsberg on the choice of languages for TypeScript is worth reading. Spead that type of thinking! (And recognize the massive shift that Microsoft made)
1728456
Karel Zikmund @zikicz.bsky.social · 11/03/2025
Congrats duuuude!
010
Reposted by Karel Zikmund
Amy Siskind @amysiskind.com · 08/03/2025
😂😅
554417058935
Karel Zikmund @zikicz.bsky.social · 08/03/2025
PM? Part-time Manager? ;)
100
Karel Zikmund @zikicz.bsky.social · 07/03/2025
Aspiring manager?
110
Karel Zikmund @zikicz.bsky.social · 07/03/2025
Both easily spotted. One on eyes. Both on answers and how they present them. Don't they understand it is possible to spot them? Do they hope interviewers will not notice?
100
Karel Zikmund @zikicz.bsky.social · 07/03/2025
The "fun" thing is my colleagues met cheaters over last half a year if not longer. I didn't, until couple of weeks ago (and I interview a lot ... 150-200 per year) And it is second instance since then ...
100
Karel Zikmund @zikicz.bsky.social · 07/03/2025
Sensitive responses into DM, I will keep them confidential / anonymized!
000
Karel Zikmund @zikicz.bsky.social · 07/03/2025
Poll time: Would you consider using AI in interview, when it is explicitly forbidden? If yes and if you were found out, how would you react?
200
Karel Zikmund @zikicz.bsky.social · 07/03/2025
I tried to challenge one such person at the end of the interview. They were prepared with aggressive attack and proofs at hand why they are not cheating. Weird experience, won't do it again. Now focused on embracing AI in interviews: karelz.github.io/ai-interviews
karelz.github.io
Karel Zikmund - Using AI in Interviews - Experiment / Mock Interviews
200
Karel Zikmund @zikicz.bsky.social · 07/03/2025
What do you do when you catch candidates cheating with AI during interviews? (when it is upfront forbidden) When it is obvious, i.e. they have no clue what they write, why, or start parroting encyclopedic knowledge without saying why.
karelz.github.io
Karel Zikmund - Using AI in Interviews - Experiment / Mock Interviews
210
Karel Zikmund @zikicz.bsky.social · 07/03/2025
So, users will use .NET and expect us to do the heavy lifting ... sniff
100
Karel Zikmund @zikicz.bsky.social · 01/03/2025
Detailed info: karelz.github.io/ai-interviews/
karelz.github.io
Karel Zikmund - Using Ai in Interviews - Experiment / Mock Interviews
200
Karel Zikmund @zikicz.bsky.social · 01/03/2025
If there is too high demand, we might start choosing participants - will be done in direct DMs.
100
Karel Zikmund @zikicz.bsky.social · 01/03/2025
We are looking for both experienced devs and also uni students -- you qualify, if you think you can use AI efficiently to boost your productivity in coding/problem solving/designing. Does not matter if you think you are "good enough" for Microsoft or not. Anyone can participate.
100
Karel Zikmund @zikicz.bsky.social · 01/03/2025
What to expect? ... We will adjust as we go, but first proposal is: - 1h interview session (over Teams with shared screen to see how you use your favorite AI in your preferred IDE) - 30-60 mins free chat/on-off mentoring session (either same session, or separate)
100
Karel Zikmund @zikicz.bsky.social · 01/03/2025
What's in it for you? - You get direct feedback from experienced interviewer - Free chat / one-off mentoring session with successful Microsoft engineer/interviewer about topics of your choice Interested? ... Ping me! (Reposts appreciated)
100
Karel Zikmund @zikicz.bsky.social · 01/03/2025
Few of us, interested in hiring, want to find out how best to assess candidates who use AI - their ability to use AI tools efficiently to be more productive at their job. AI tools put an end to Leetcode-style questions, so let's find a way how to assess the AI-empowered engineer.
210
Karel Zikmund @zikicz.bsky.social · 01/03/2025
Using AI in interviews -- looking for volunteers for mock AI-enabled interviews. If you are proficient in using AI in your daily work (job, hobby projects, school work), and you'd like to try to use them also during interview, ping me. This is community-driven effort!
5129
Reposted by Karel Zikmund
Mark Hamill @markhamillofficial.bsky.social · 28/02/2025
Could not agree more. The Prez & VP are shameful, embarrassing Putin puppets & a disgrace to our country. 🤮 #SlavaUkraine 🇺🇦
15926527812398
Reposted by Karel Zikmund
Scott Hanselman 🌮 @scott.hanselman.com · 28/02/2025
I stand with Ukraine and the truth that Russia is an invader.
952876
Reposted by Karel Zikmund
Tom Deseyn @tomdeseyn.bsky.social · 21/02/2025
Check out Tmds.Ssh! It is an MIT licensed .NET SSH client library that supports remote execution, forwarding connections and file management. It works with Linux, Windows, macOS and many Linux-based appliances (router, NAS, ...). github.com/tmds/Tmds.Ssh
github.com
GitHub - tmds/Tmds.Ssh: .NET SSH client library
.NET SSH client library. Contribute to tmds/Tmds.Ssh development by creating an account on GitHub.
4489
Karel Zikmund @zikicz.bsky.social · 05/02/2025
YARP is changing home and repo name! Please welcome YARP "back" to .NET family, where it always have been in its heart. It should not affect any contributors - GitHub redirects will make everything work. github.com/microsoft/re...
github.com
📢 Repository Move: `microsoft/reverse-proxy` → `dotnet/yarp` · Issue #2736 · microsoft/reverse-proxy
We're moving the YARP repository from microsoft/reverse-proxy to dotnet/yarp! Why the Move? This change aligns YARP with the rest of the .NET ecosystem, making it easier to find and contribute to a...
0257
Karel Zikmund @zikicz.bsky.social · 03/02/2025
Yep, and it is a new interviewing skill to push questions beyond "prompt engineer" and see if candidate can realize when the results are not good to use
000
Karel Zikmund @zikicz.bsky.social · 03/02/2025
Started thinking about experimenting with AI during interviews. Idea: allow candidates to use it and yet still be able to find out if they might be good hires. Why? ... AI is here, we use it in daily jobs. Why not during interview? I am curious what we will find ...
100
Karel Zikmund @zikicz.bsky.social · 05/01/2025
Are you folks getting also some good discounts? This hobby is getting pricey :)
100
Karel Zikmund @zikicz.bsky.social · 05/01/2025
Nice! We literally just finished last piece of another great set. Enjoy the build!
030
Reposted by Karel Zikmund
Kirill Osenkov @kirillosenkov.com · 29/12/2024
Finally had time over the holidays to realize a long-standing dream of mine: a hex editor that knows about the PE file and .NET metadata format. You can click any byte and it will show you which data structure it is in the tree. Every byte is covered. The parser is at github.com/KirillOsenko...
Screenshot of a hex editor with a PE file open, on the left there's a tree with the headers, sections and other parts of the file format. On the right there's a typical table of bytes in hex.
824264
Karel Zikmund @zikicz.bsky.social · 23/12/2024
media.tenor.com
a baby wearing a striped shirt is covering his face with his hand .
ALT: a baby wearing a striped shirt is covering his face with his hand .
110
Karel Zikmund @zikicz.bsky.social · 22/12/2024
Watching a Christmas movie with my 12yo son ... his pick Die hard! My job is done.
1130
Karel Zikmund @zikicz.bsky.social · 22/12/2024
Congrats then!
110
Karel Zikmund @zikicz.bsky.social · 22/12/2024
Cool! Any marriage proposal accepts we could celebrate?
100
Karel Zikmund @zikicz.bsky.social · 07/12/2024
And yes ... the hiring process sucks and is far away from transparent :/ Something I am ashamed of ... I am trying to improve it a bit from the inside, but it will take years and no guarantee I will succeed ;( ... one step at a time ...
000
Karel Zikmund @zikicz.bsky.social · 07/12/2024
Sorry, I somehow missed your reply :/ Sadly, no idea about Data Scientists. Perhaps find someone in that role on LinkedIn and ask them? Sadly, I don't have any connections I could connect you to. Are you interested in Prague or other specific position elsewhere?
100