Devchild BV
I'm Mario Vanhecke. I build enterprise software for a living.
Freelance .NET consultant, based in Belgium. Over 20 years in the business. I've helped companies like NMBS, STIB/MIVB, ArcelorMittal, and Unilin build software that actually works in production.
I work alone, on purpose. No team to manage, no overhead to pass on to you. Just one senior engineer who picks up the phone, writes the code, and takes responsibility for the result.
What I can help with
Building .NET applications
APIs, microservices, full-stack apps. I've built systems that handle millions of transactions, but I'm just as happy helping you get a solid MVP off the ground.
Fixing and modernizing existing systems
Stuck with a legacy codebase? I can help you untangle it, step by step, without breaking what's already working.
Technical guidance
Sometimes you just need someone to look at your architecture, review your approach, or help your team through a tricky decision. I do that too.
Industrial and embedded software
I've built software for CNC machines with computer vision, train conductors' handhelds, and contactless payment systems. If your project involves hardware, I'm probably not scared of it.
Some projects I've worked on
I built the IBIS paperless system used by train conductors at NMBS. I worked on MOBIB, the contactless payment card for Brussels public transport at STIB/MIVB. I developed CNC control systems with computer vision for Unilin, and built logistics systems for ArcelorMittal's European mills.
Want to talk?
Got a project, or just want to pick my brain over a coffee? I'm up for it.