Hello, I’m Jappie Klooster, at your service. I like cooking, black smithing and telling computers what to do (also known as programming). I’m a freelance software engineer working for Converge at the moment.
Around 2004 I was high schooler, perhaps too clever for my own good and a little bored, so I decided to torment my classmates by writing a mailbomber in PHP. Quite a feet for a 15 year old. Since then I’ve been writing programs in all kinds of languages. I started using Haskell seriously in 2017 when I joined Daisee as a software engineer. Haskell is the best as far as I can tell. Which is why I still use it and write about it so much.
I like solving problems and produce software that’s valuable. I prefer simplicity, succinctness and wit. I get joy out of old things that stood the test of time, especially (mechanical) machines, books and furniture. Lastly, I hate the number five.
Timeline
A brief overview of meaningful events and decisions in my life.
| 2025 | Stacked against us. I made it to the bronze division nationals finals in crossfit, ended up at 28th position! Visited my sis in Iceland. My little sis got pregnant. |
|---|---|
| 2024 | Applying abstract maths to concrete factories. Dealing with my debt arc. I met weronika, I broke up with weronika. |
| 2023 | Aruba is open for business. I quit supercede and became a construction worker at converge. Crossfit Nationals. |
| 2022 | I participated in zurich hack. I read zhuangzi and became useless. I’m trying to get into real estate. |
| 2021 | I started doing crossfit. I got vaccinated. I started working on massapp. I became secretary of the haskell foundation compiler tooling taskforce. |
| 2020 | I bought a house in Kampen. I joined Supercede. I went to work from Aruba remotely. I started working on videocut.org |
| 2019 | I stopped working on raster.click. I did some freelance work, and then decided to work for a consultancy company. I started to stream occasionally. |
| 2018 | I went Back to the Netherlands!. I stopped working on my pantry. I started working on another startup idea: raster.click. |
| 2017 | Graduate MSc AI at Utrecht University. I rejected a PhD position. Temporarily stayed in Indonesia. Go to work in Australia. I worked on a startup idea with some friends: My pantry. Here I lost the weight I gained in China. |
| 2016 | Start writing this blog. |
| 2015 | Graduate BS computer science degree. Start MSc AI at Utrecht University. |
| 2014 | Internship in China. |
| 2012 | Pick up studies once more. I started running, once or twice per week. A habit I maintain to this day. |
| 2011 | Gap year. |
| 2009 | Admitted to BS computer science. Graduate highschool. |
| 2008 | I found a PHP program I made in this year for a science project on highschool. It was in my send folder as ad-hoc backup email to myself. |
| 2000 | Move to Ansen |
| 1992 | Born. Live in Franeker. |
About this blog
This is a personal and technical blog. I post about things that interest me, and I write here because I enjoy writing. I enjoy organizing my thoughts, and I enjoy getting better at writing and reasoning. My hope is to get better at writing, by doing. I also enjoy reading back on previous experience. Nostalgia can be a goal on itself. I take pride in this work and if you spot grammar issues or untruths, please let me know.
AI usage on writing articles
I don’t use AI to generate aritcles or paragraphs. I think I’ve only generated a paragraph in this article. But I quickly decided against doing so because it felt no longer like my “voice” being used. I do use AI to check grammar and spell errors, for example with the prompt: “please list all grammar and spell errors, don’t skip any as I’m dyslexic: