My name is Jelte de Jong. In 2004 I obtained my bachelor's degree in mechanical engineer. After receiving my degree I went to Taizé France. There I worked in the monastery as a volunteer for 8 months. When I came back I worked for several companies in several positions. In 2009 I got hired by Strukton Rail. There I started working with Inventor.

My hobby has always been programing all kinds of stuff. In 2013 I decided that if I ever wanted to do something with that I needed to get some education as a software engineer. Therefore I went to the “Open Universiteit”. I did that next to my full-time job till 2016. That year I wanted to marry Linda. Organizing the wedding proved to be too much and I stopped my studies. Also that year I got a new job and was hired by Kelvion refrigeration. That is where I’m still working. My job is to help the engineers to create solutions as fast and efficient as possible. Therefore I’m responsible for creating and maintaining several add-ins for Inventor. One of those addons is a product configurator. A great part of my time I’m busy extending that configurator. Also, I spend much time answering help requests from the engineers.

At home, I like to help people. I spend quite some time on the “Inventor iLogic, API & VBA Forum”. I released some addins in the Autodesk app store. And I started writing blog posts. In 2022 i joined the Autodesk Expert Elite program. "The Expert Elite program recognizes customers around the world who contribute to the Autodesk Community by sharing their product knowledge, best practices and expertise. By acting as leaders and being actively involved, Expert Elites help our customer community to thrive."

Next to that I spend my time with my son and I play handball.


If you have a question about Inventor, iLogic, addins or anything else that involves using the Inventor API, then please ask it on the “Inventor Customization forum”. (if you add “@JeltedeJong” to your question I will get notified and I will try to help you.) You can find me on the following platforms.

Inventor Customization forum
Linkedin profile 
Autodesk app store

If you want to contact me directly then you can use the mail address blog.hjalte/at/
(Because of spam I obfuscate my mail address. As human, i guess you can figure out what to do ;-)


This is my personal site. These are my personal opinions and not necessarily the opinions of my employer. Test all iLogic code, you find on this site, extensively on non-production files. Do not use any code in a production environment until YOU have thoroughly tested it and have verified that it works as expected. Always back up any data before running any experimental code. You are ultimately responsible for any iLogic code that you run, so make sure you test it thoroughly!


Autodesk Inventor, Vault, Git, C#, vb, .net, php HTML, css, js


University computer science.
HBO Mechanical engineer.
MBO Fine mechanics.


Programmer and Mechanical engineer at Kelvion
(2016 - 20..)

Mechanical engineer at Strukton
(2009 - 2016)

Mechanical engineer at RDG-engineering
(2007 - 2009)

CNC Programmer at VMC
(2005 - 2007)

volunteer at Taizé


Objectgeoriënteerd analyseren en ontwerpen, Objectgeoriënteerd programmeren in Java, Webapplicaties: de clientkant, Databases, Security Aware Programmer, Web Security Specialist