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Ambroise PetitjeanAP

Ambroise Petitjean

Senior Software Engineer Python | JS | GO | Rust

€880/day
Paris, FR
8-15 years

Average response time: 1 hour

About Ambroise

Engineering leader with 15+ years building complex applications and AI systems at scale. My career spans the evolution from Big Data to modern ML/AI, giving me unique perspective on architecting production systems.
I architect and deliver complex technical solutions for enterprise clients including LVMH, L'Oréal, and major financial institutions, combining deep data engineering expertise with modern full-stack
development.
I excel at leading technical teams through complex migrations and greenfield projects, from clusters at major banks to LLM-powered applications on GCP. Equally comfortable writing production code or mentoring engineers to elevate their craft.

Please feel free to contact me if you have further questions.
  • English

    Native or bilingual

  • French

    Native or bilingual

  • German

    Fluent

  • Swedish

    Conversational

Can work on-site
Paris (up to 10km)

Experience

  • koko VR Theater
    Creator
    May 2026 - Today (3 months)
    Designed and built a premium VR media player for Meta Quest in Rust, delivering smooth 8K VR180/360, HDR, and stereoscopic 3D direct-play. Engineered a low-level graphics pipeline (OpenXR + Vulkan YCbCr, ExoPlayer bridge) with a custom clock-recovery frame pacer, native Plex/Jellyfin/SMB/NAS backends, an in-VR browser, and peer-to-peer Watch Together co-viewing.
    Rust Kotlin Vulkan Réalité virtuelle
  • Koala Academy
    Co-Founder & CTO
    EDUCATION AND E-LEARNING
    July 2025 - Today (1 year and 1 month)
    Paris, France
    Founded innovative AI-powered language learning platform revolutionizing pronunciation training through personalized experiences and cutting-edge artificial intelligence technologies. Leading technical development and product strategy for next-generation educational technology.

    - React Native, AstroJs
    - LLM finetuning, Local LLMs, RAGs and MCP
    - Webassembly in Rust
    React Native Rust Kubernetes MCP LLM Fine-tuning
  • Krafti.io
    Founder
    TECH
    September 2019 - Today (6 years and 10 months)
    Paris, France
    Developer of a smart platform in the Human Resource sector (Golang / GCP / Nextjs / Typescript / Tailwind)
    JavaScript Typescript React.js GO Flutter

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Education

  • Grade Master
    Montpellier Business School
    2012
  • B.Sc
    Mannheim Universität BWL
    2009
    Exchange Student

Skill set

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