Michael Koper
michaelkoper.com
Michael Koper
@michaelkoper.com
Dad of two - Founder of https://nusii.com - Bootstrapper - Ruby on Rails
Pinned
Hello again!

We are doing introductions?

I'm Dutch living in Madrid, Spain. I have been working on my own startup Nusii (online proposal software) for 10 the last 10 years.

I recently started to do some temporary freelancing on the side just for fun.

I like playing the drums 🥁
Today we were eating at a Mexican restaurant and the waitress showed us this framed note. It is what my kid left on the table when we left ~3 months ago 😍

(translation: The best restaurant of the world!)
November 30, 2025 at 5:51 PM
After a year of inactivity with my SaaS I’m slowly getting my product obsession back. And for me that fuels right back to marketing as well. To get excited so I can tell the world works better for me than the other way around.
November 30, 2025 at 10:46 AM
Saw an awesome talk by @karreiro.bsky.social yesterday at Madrid.rb about creating Ruby gems with a native Rust extension.

He ported the Rust toml parser to Ruby in a couple of minutes and it was almost 3 times faster than the fastest Ruby toml parser.

Such a great talk!
November 28, 2025 at 12:41 PM
A little secret, I never had CI for Nusii and it has never been a problem.

I just always run my tests and rubocop before deploying ¯\_(ツ)_/¯

Only make things complex when they need to be complex!
November 28, 2025 at 12:24 PM
FYI. I learnt this today the hard way. A decimal column converts into a BigDecimal and a jbuilder template converts those into strings, not numbers.

Not ideal when you build a Zapier integration and you have no clue why the responses don't match 😅
November 26, 2025 at 8:04 PM
Reposted by Michael Koper
Hey friends! OG Kit is off 30% for Black Friday week 🎁

Check out the video below, tell a friend, or just go buy it really!

It's pretty cool, if you haven't seen it 😆
Okay, so I'm pretty sure I've found the best way in the world to create dynamic Open Graph images! And I've turned it into a little product that I'd love to show you 🤩

Check out this quick video tour of Ogkit.dev to see how it works 👇

www.youtube.com/watch?v=UoVr...
The best way in the world to add Open Graph images to your website
YouTube video by Peter Suhm
www.youtube.com
November 26, 2025 at 1:37 PM
I installed SuperWhisper and now I'm talking to the AI like a fucking weirdo.
November 26, 2025 at 12:57 PM
Started a new experiment. Lets see if Laravel people need Proposal Software 😊
November 19, 2025 at 12:10 PM
I'm feeling like the small guy that keeps dodging all the punches from the big guys. Dodged the AWS and Cloudflare outages!
November 19, 2025 at 9:37 AM
I'm starting to create many Claude Code commands recently. One of those things of, why didn't I do this before?
November 19, 2025 at 9:25 AM
I just sold my old monitor with @benediktdeicke.com 's UserList sticker on it.

"Sorry I forgot to take that sticker off"

"Don't worry, I like it"

😂
November 18, 2025 at 9:32 AM
I had a small discussion a while ago where they said that unit tests should never hit the database.

I honestly don't know why it is such a big deal? It is so much easier to write. Unit tests are also the fastest test to run. 545 tests under a second ¯\_(ツ)_/¯
November 17, 2025 at 10:43 AM
Also for the Ruby people in Madrid. That mountain chain in the back is called La Pedriza and it is absolutely beautiful. I’m thinking of organising a one day retreat with Ruby people. Hiking plus Ruby talk.

Please let me know if you’re interested!
Last 6 months I’ve been working so much that I forgot that I live in such a beautiful place.

Two weeks ago I started to work less and started to go back to running twice a week.
November 16, 2025 at 12:35 PM
Last 6 months I’ve been working so much that I forgot that I live in such a beautiful place.

Two weeks ago I started to work less and started to go back to running twice a week.
November 16, 2025 at 12:32 PM
For the Madrileños here. A friend of mine is going to give a concert with his new band the 4th of December in Madrid.

I'm going!

Ticket available here: linktr.ee/elerror

And their newly released song is on there as well.
el error | Instagram, Facebook | Linktree
Powertrio de punkrock en español con matices de hardcore y pop vomitado. Eclécticos, como buenas hijas del siglo pasado no nos gusta las etiquetas, ni las bios.
linktr.ee
November 13, 2025 at 12:14 PM
Creating a Zapier integration is... time consuming... 🤪
November 13, 2025 at 12:09 PM
I recently changed computers and I must say, personal dotfiles, homebrew, and 1Password are a lifesaver!

I could have done it with Time Machine, but I always like to start from scratch for some reason.
November 12, 2025 at 10:23 AM
15 years ago I made an with a friend that we never launched (even though it was sort of finished). I liked skateboarding but didn't know anybody in Madrid. So we made crowdboarding.com (right now for sale, not by me).

It was a two-sided market place for skateboarders who wanted to meet people.
November 12, 2025 at 10:10 AM
Yesterday I was struggling with some code all day. Today I walked the dog for one hour only thinking about this problem and within 10 minutes, I got it working!

The lesson? Get a dog if you want to get things done!
November 12, 2025 at 10:03 AM
What have you done @lucianghinda.com ???? 😱
November 12, 2025 at 7:08 AM
Somebody has a decent webcam to recommend for video calls and screencast. Doesn't need to be pro, just slightly better than the standard on a MBP.
November 6, 2025 at 5:53 PM
And the winner for the most useless macOS UX is, ...

😂
November 6, 2025 at 1:19 PM
M4 Max compare to M1 Pro

Test suite runs more than 4 times faster! 😱
About to buy a Mac Studio M4 Max, 64GB RAM 😱

For some unknown reason I prefer a desktop instead of a laptop.

Anybody here regretted buying a Mac Studio?
November 5, 2025 at 6:01 PM
About to buy a Mac Studio M4 Max, 64GB RAM 😱

For some unknown reason I prefer a desktop instead of a laptop.

Anybody here regretted buying a Mac Studio?
November 2, 2025 at 3:41 PM
Always nice to see @mjwhansen.com!!
November 1, 2025 at 1:36 PM