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Yohann DandevilleYD

Yohann Dandeville

Fullstack Developer

€550/day
Toulouse, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Yohann

A web project, an AI integration, a custom tool — I build, I deliver, I adapt.
I am Yohann, a fullstack developer based in France, founder of YdvSystems. I design complete business software, SaaS, AI integrations, and interactive experiences.

— from brief to production —

Ten years leading a cultural organization before specializing in development — I approach a project by understanding the business stakes, not just the technical specs.
Clean code, scalable architecture, zero over-engineering. Responsive, focused on the essentials, no unnecessary meetings.

Comfortable with very different projects: multi-tenant SaaS platforms, multi-provider AI integrations, cross-platform desktop software, 3D browser games.

What motivates me: solving a real problem for a real need — not just delivering code for the sake of it.
  • French

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • YdvSytems
    Developer — B2B SaaS Platform for Employment and Training Sectors
    PUBLIC SECTOR
    December 2024 - Today (1 year and 6 months)
    Narbonne, France
    B2B SaaS Platform
    : **4 business solutions (IAE employment, Qualiopi training, coaching, CRM)**, strict multi-tenant architecture, granular RBAC, multi-provider AI, real-time, Stripe payments.

    **8000+ automated tests**, ~99,000 lines of code.

    **Commercial launch scheduled for June 2026**.

    Next.js Typescript Automation & Artificial Intelligence tRPC Prisma
  • YdvSystems
    Developer — Prompt Engineering PWA & Android Application
    SOFTWARE PUBLISHING
    October 2025 - December 2025 (2 months)
    Narbonne, France
    **Professional AI Prompt Generator**: real-time expert scoring (TF-IDF, coherence analysis, intent detection), **66+ business templates, 8 languages**. Available as PWA, Desktop, and native Android — **100+ downloads on the Play Store**. Offline RSA-2048 licensing system.

    React.js Typescript Capacitor PWA Cryptography
  • YdvSystems
    Developer — Cross-Platform Interactive Narrative Game
    CULTURE
    February 2023 - June 2024 (1 year and 4 months)
    Toulouse, France
    **Solo Narrative Role-Playing Game (Online)**: 621 paragraphs, **45 locations with video and sound ambiance**, 59 enemies. **2 playable characters**. Deployed on Web, Desktop (Tauri), and Mobile (Capacitor) from a single codebase. ~30,000 lines, zero external UI dependencies, **3D WebGL dice**, procedural audio via Web Audio API. **Careful artistic direction on mobile**.

    React.js Typescript Vite.js Tauri Capacitor

Recommendations

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Benjamin Azé and 1 other person have recommended Yohann

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Education

  • Web Integrator Developer
    OpenClassrooms
    2021

Skill set

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