
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.
Apple Watch as Phone
Replace your smartphone with a smartwatch

Imagine a week without your smartphone, replaced solely by the sleek simplicity of a smartwatch. This week I did this, leaving my smartphone behind and letting an Apple Watch take the helm. Many hail this as a liberating escape from our attention-seeking digital sidekicks, but does it truly live up to the hype? Join me on this intriguing journey, where technology meets minimalism, and discover whether less really can be more.
And... there is light!
Installing dynamo powered lights on my road bike

The darker days are here in the northern hemisphere, and so is the need for good lights on your bike. Although battery powered lights can do the job, you need to keep them charged. I wanted a light system on my road bike that just works. Read along for some light in the darkness!
Giving AI Training
Teaching folks about the superpowers of GPT

Yesterday, I had the pleasure of leading a training session on the application of cutting-edge AI techniques, such as OpenAI's large language models (GPT), for a team of individuals from varied backgrounds, education levels, and disciplines. The results surprised me!