
Willem L. Middelkoop MSc BICT
IT business owner, investor, hacker and software developer






Lemmid Store
With Lemmid Store business owners can easily sell products online via their own website, independently from big (powerful) platforms.

DigiDef
DigiDef is a specialised bureau that analyses existing computer systems and offers help with improving security.

Lemmid B.V.
Lemmid provides internet services for selected Dutch and international customers. Together with the customer Lemmid develops new IT products and services, including websites, web applications and apps.

dsd 164 B.V.
dsd 164 B.V. is a publisher of mobile apps for the international market. Apps from dsd 164 B.V. are downloaded millions of times.

Willem & Laurentz Holding B.V.
The Willem & Laurentz Holding B.V. invests in technology related companies. It is actively contributing to the development of new initiatives.

Snake '97
Play Snake like it is 1997. This is a remake of the original Snake, complete with dot-matrix display and monotone sounds. The game has millions of fans world wide.
Back to the University
Diving into Scientific Programming

This month, I headed back to university for a special course on scientific programming. With numerous recent advancements in machine learning (referred to as "AI" in PowerPoint parlance), including ChatGPT, it felt like the ideal moment to delve into Python programming. Join me on this journey.
Rolex DateJust 36
A crown for every achievement

The year 2022 has been very special to me, after working very hard to make it possible: me and my family finally made the big move to Limburg. To commemorate this milestone, I got myself a timeless timepiece: the Rolex DateJust 36. Read on to find out what it's like!
Moving to the countryside
Leaving the big city for a small village

This month marked "the big move": relocating my family from Amsterdam to Noord-Limburg's countryside. Motivated by my wife's longing for her roots and our desire for space, the timing felt right. As our oldest child neared four years and primary school, we considered embracing the countryside lifestyle. Would trading Amsterdam's bustle for a new pace be rewarding? Read on!