CAD Software Developer since 2008
I'm Maxence DELANNOY, a craftsman developer with a passion for software quality. For over 17 years, I've been helping engineering firms and software companies build custom add-ins for Autodesk products: AutoCAD, Inventor, Revit, Vault...
Clean code, lasting solutions
I approach development as a craft: every line of code is written to be readable, maintainable, and performant. No throwaway solutions or shortcuts — I build reliable tools you can count on for years.
One point of contact, maximum responsiveness
When you work with me, you talk directly to the person who designs and develops your solution. No middleman, no lost information: I understand your needs and respond fast. This agility allows me to adapt to your constraints and deliver on timelines that larger companies simply can't match. And without their overhead costs, I offer more competitive rates for the same quality.
A broad range of expertise
My core expertise is C#/.NET development for Autodesk platforms, but my skills extend further:
- Legacy project takeover: AutoLISP, VBA, VB.NET, or C++ (ObjectARX)
- Web applications and MS Office add-ins
- Other CAD systems: SolidWorks, SketchUp, Rhino3d, ZWCAD...
Let's talk about your project
Have a CAD or software development need? Contact me for a free quote, by e-mail or at (+33) 6 46 40 75 66. I'd be happy to discuss your project.

Latest Publications
Blog Articles
- Configuring Vault with Inventor
4/11/2026 - Geometry Library in C# — Composite Curves
4/4/2026 - Geometry Library in C# — Curves
4/4/2026
Questions & Answers
- What is AutoLISP?
1/15/2026 - How to do a 3D rotation in AutoCAD?
1/12/2026 - How to find the intersection between a line and a plane in AutoCAD?
1/12/2026