It's Twenty Three

Jarek Rozanski
Jarek Rozanski
@jarek@its23.eu

Hi, I am Jarek, a seasoned Software Engineer with extensive experience in developing complex systems like search engines, web applications, and electronic trading platforms. I currently run my own consulting firm, Input Objects, and privacy-first web analytics, Wide Angle Analytics. When acting as a Functional Programmer, I primarily code in Scala but also have a strong interest in OCaml and F#. On a daily basis, I use various programming languages, including Java, C#, JavaScript, TypeScript, and Go.

This account is attached to my WordPress instance. My main Mastodon account is @jarekrozanski@mastodon.social

37 posts
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My Website

jarekrozanski.eu

My Business

inputobjects.com

Best Web Analytics

wideangle.co

  • Beyond Deploy: Episode 2

  • WordPress Federated posts formatting

    First snag with the #ActivityPub plugin for #WordPress: It appears that even simple formatting, such as new lines, is being trimmed when viewed from #Mastodon. Not sure if this is WordPress or Mastodon doing. Any advice? That was fast. Thanks to helpful community support of ActivityPub plugin, I got quick reply and solution to my…

  • Tiny Keyboards Layout

    I was a huge fan of #Miryoku. It feels so ergonomic and logical that I “mastered” it in a matter of minutes. But Miryoku has a fatal flaw. Using Modifier + Letter/Number + Nav button is impossible without very custom mappings. I am trialling a slightly modified RSTA layout on a 3w6 #ergokeyboard starting. It…

  • Embracing Fediverse

    It is 2026 and I can’t believe it took to me so long to embrace full power of Fediverse. Today is am starting with WordPress integration and ActivityPub plugins. Very excited.

  • Hobby or No Hobby

    Here’s what billion-dollar businesses have in common: they weren’t built after their founders perfected their “endgame” keyboard.  Back in May and June 2025 – about four months before writing this post – I got sucked into the vortex that is custom keyboards. If you’re not aware, there’s a whole cottage industry built around people who not only…

  • MRR Sucks as Measure of Success

    While I am not a big fan of Monthly Recurring Revenue – MRR, as a measure of success, I support the argument that it (or its increase) is a signal of customer interest. That said, I, as a consumer or a business client, actually avoid those who publish MRR metrics. Here is why: So, MRR…

  • You should learn something new

    … even if it is not comfortable. Or perhaps, especially if it is uncomfortable. This is my keyboard. This is what I use to type on as my so-called daily driver. And that’s a lie. It’s only half of my keyboard 😉 My keyboard, an interpretation of the open-source hardware 3w6, has just 36 keys.…

  • MacOS is a hostile operating system

    I am currently on a journey to optimize my workflow, which includes using as many application and system shortcuts as possible. But boy, it is extra hard on Mac device. About six months ago, I switched from Linux/Windows to the macOS ecosystem. I knew the system was flawed, but the appeal of ARM chips in…

  • Learn To Touch Type

    Massive disclaimer: I am still learning how to touch type. I still have an abysmal 50–60 WPM performance. What I am sharing is my personal experience and the techniques I find valuable. Your mileage will vary. Touch typing is a technique that involves typing without looking at the keyboard, using the same fingers on predefined…

  • Learning To Type – From 0 To 60WPM

    I have been a horrible typist my whole life. Unlike my parents, I grew up at a time when typewriters were being phased out, but computers were not yet omnipresent. This meant schools had already stopped teaching touch typing—a skill often offered only to girls, as traditional, sexist society assumed they would become secretaries or…