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Yvan S.YS

Yvan S.

Architect .NET/Mobile | AI Edge & Optimization

€500/day
Lyon, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Yvan

Passionate developer and system architect, I help you solve your most complex technical challenges in the .NET/C#, React Native, and Unity ecosystems.
My goal? Smooth, high-performing, and sovereign applications, without compromising on user experience or latency.
🔹 What I do daily
I dive into the code to optimize every millisecond: fine memory management, concurrency, asynchronism, or integration of ultra-fast local AI (less than 40 ms inference). Whether for a high-load .NET Core API, a cross-platform mobile app, or a real-time Unity system, I structure robust, scalable, and Cloud-independent solutions.
🔹 My specialties
✅ Mobile Apps & APIs: React Native for fluid interfaces, ASP.NET Core for asynchronous and resilient backends (queues, rate limiting).
✅ Performance & Architecture: Latency reduction, object pooling, memory and garbage collector optimization, relational or real-time databases.
✅ AI & Edge Computing: Integration and optimization of ONNX Runtime models or Reinforcement Learning algorithms for embedded intelligence, without external dependencies.
✅ Simulation & Real-Time: Advanced tools under Unity 3D for industry, R&D, or video games.
🔹 Why work with me?
Because I don't just write code: I think like a system architect. Whether you want to:

Boost a lagging mobile app,
Rethink a C# API that can't handle the load,
Embed local AI without cloud or latency,
... I transform your technical problems into sustainable, maintainable, and production-ready solutions.
  • French

    Native or bilingual

  • English

    Conversational

Can work on-site
Lyon (up to 15km)

Experience

  • (Siva Games) Yvan Simon EI,
    R&D Engineer & Lead Developer
    January 2025 - Today (1 year and 7 months)
    Lyon, France
    › Cloud & Security: .NET Core "Bank-Grade" API (AES-256, Auth), Azure/Linux Infrastructure (Nginx, Systemd) & Bot Ecosystem (Node.js).
    › System R&D (Rust/ASM): Creation of the FluxGridOS Kernel. Low-level implementation: Drivers (GPU/USB), Memory Management (Paging) & Interrupts.
    › AI R&D (Computer Vision): Adversarial Architecture (GAN) for Deepfake detection. Model trained on proprietary datasets achieving 95% accuracy.
    .NET C# Performance Optimization Algorithmics Git/Github Unity 3D
  • Nabiya,
    Gameplay Programmer (Internship)
    January 2024 - September 2024 (8 months)
    Lyon, France
    › Performance & Logic: Development and critical optimization (CPU/Memory) of game mechanics (Verse/Fortnite) in collaboration with Game Design.
  • Dawan,
    Full-Stack Developer (Internship)
    January 2023 - August 2023 (7 months)
    Lyon, France
    Design and development of an ERP-type business application for internal management, using Java Spring Boot for the backend and React for a responsive and high-performance user interface.

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Education

  • MSc-Pro
    EPITECH
    2026
    MSC-PRO
  • BTS SIO
    Lycée ICOF Lyon
    2021
    BTS SIO

Skill set

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