About
Yohann Dandeville
Full-stack developer & founder of YdvSystems
I build business software for social services, training and coaching. My approach: clean code, solid architecture, and an obsession with the finished product.
Background
From code to real-world impact
Full-stack developer for over 10 years, I've worked in various environments — startups, consulting firms, open source projects. But it's in the social services and training sector that I found my technical calling.
Working with social inclusion organizations, training centers and career coaches, I noticed a recurring problem: passionate professionals wasting time on inadequate tools — Excel, paper, generic software that doesn't understand their work.
That's why I created YdvSystems: 4 business applications designed by a developer who knows the field. Every feature solves a real problem, not an abstract specification.
In parallel, I continue helping companies across all sectors as a freelancer — custom development, AI integration, technical training. Each mission feeds the products, and vice versa.
Values
What guides my work
Uncompromising quality
7,225 automated tests across my platforms. Clean code isn't a luxury — it's the only way to deliver reliable products.
Full transparency
Published pricing, auditable source code, no surprises. You know exactly what you're paying for and what you're getting.
Real-world impact
Every line of code must solve a real problem. No gimmick features, no over-engineering.
Responsiveness
I work solo, which means fast turnaround and direct communication. No unnecessary meetings, no management layer between you and me.
Front-end
Back-end
Databases
Artificial intelligence
DevOps & hosting
Cross-platform
Tools & integrations
Have a project in mind?
Describe your needs and I'll get back to you within 24 hours with a concrete proposal.