Custom development · AI · Business software
Business software & AI
for social services, training & coaching
4 ready-to-use SaaS solutions for social inclusion, training, coaching and management. Custom freelance development for all your projects. Native AI expertise.
I'm Yohann Dandeville — fullstack developer, founder of YdvSystems. You're talking directly to the person who codes.
Freelance services
Web development & technical consulting
Short-term missions or long-term projects — from custom development to AI workshops, across all industries.
Custom development
Business applications, SaaS platforms, web apps. From prototype to production.
AI integration
Integrate Claude, GPT-4 or Gemini into your existing tools. Multi-provider architecture.
AI workshop / Training
Hands-on workshops for your team: prompt engineering, AI tools, business use cases.
AI maturity audit
Assessment of your AI readiness, personalized recommendations, implementation roadmap.
Our products
Business software for the social sector
Each product is standalone, fully featured and independently deployable. 14 core modules included in every subscription.
YDV Insertion
The software for work integration social enterprises
Beneficiary tracking, interviews, DREETS reporting, built-in AI. 19 modules for social enterprises, local employment agencies, shelters.
YDV Formation
Complete training organization management, Qualiopi included
Catalog, sessions, digital attendance, BPF, native Qualiopi compliance. 17 modules for training organizations, apprentice centers, CPF providers.
YDV Coaching
Skills assessment, RPL and individual coaching
Structured 3-phase pathways, complete RPL, questionnaires, evaluations. 17 modules for coaching firms and career assessment centers.
YDV Manager
CRM, billing and business management all-in-one
Prospects, clients, quotes, invoices, subscriptions, support tickets, MRR/ARR metrics. For any organization needing a business management tool.
Portfolio
Real projects, in production
A selection of delivered projects — SaaS platforms, AI tools, accessible applications.
YDV Platform — 4 business applications
Suite of 4 SaaS applications (Insertion, Formation, Coaching, Manager). 14 core modules, multi-provider AI, 7,000+ automated tests, multi-site RBAC.
Le Château de Dracula — Interactive narrative game
Interactive narrative game — 40+ distinct visual environments, Web Audio API soundscapes. Playable with keyboard, gamepad and on mobile.
Le Prompt Parfait
Professional AI prompt generator — real-time scoring, 66+ templates, 4 platforms, lifetime license. Works with ChatGPT, Claude, Gemini and all major LLMs.
Have a project? Let's talk.
Whether it's a freelance mission, a product demo or a quick question — I respond within 24 hours.