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Julien D.JD

Julien D.

Rust Developer — Systems & Edge Computing

€450/day
Lyon, FR
3-7 years

Average response time: A few days

Freelancer profile translated to English.
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About Julien

Systems engineer specializing in Rust, embedded Linux, and edge computing. I design high-performance software and hardware infrastructures, deployed as close to the ground as possible, where latency, data sovereignty, and reliability truly matter.

What I do concretely:

-> High-performance Rust backend services (Axum, Tokio, real-time WebSocket)
-> Embedded Linux systems on ARM (Raspberry Pi, edge accelerators like Hailo)
-> On-premise distributed architectures (node orchestration, NATS messaging, local RAG)
-> End-to-end hardware/firmware/software integration

Production reference: real-time access control system in Rust/Axum/WebSocket deployed at a client in the education sector, in production.

My profile is atypical: I initially came from the clinical sector (orthotist, active RPPS) before switching to systems engineering. This dual background makes me particularly effective on projects where software touches real hardware, the body, or strict business constraints: health, medtech, industry, sensors, field devices.

I work best on problems where elegance matters as much as robustness: systems that need to last, consume little, operate without the cloud, and remain maintainable.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

Can work on-site
Lyon (up to 50km), Grenoble (up to 50km), Chambéry (up to 50km), Annecy (up to 50km), Chamonix-Mont-Blanc (up to 50km)

Experience

  • Enuxia
    Founder & Systems Engineer
    DIGITAL AND IT
    January 2025 - Today (1 year and 5 months)
    Lyon, France
    Founder of Enuxia, a systems engineering studio specializing in sovereign edge infrastructures for SMEs.

    Design and deployment of tailor-made software and hardware solutions, from component to firmware to production deployment.

    Key achievements:
    Design of a range of sovereign edge nodes (Raspberry Pi + accelerators) for independent clients
    Development of a distributed orchestration framework (Hive): master/worker architecture, NATS messaging, Rust services, local LLM inference
    Development of a complete on-premise sovereign RAG system (Rust, Qdrant, BGE-M3, llama.cpp)
    Low-level network monitoring tool with anomaly detection (Rust, libpcap)

    Stack: Rust, Axum, Tokio, Linux, Docker, PostgreSQL, Qdrant, NATS, Raspberry Pi, Proxmox, Traefik
    Rust Edge Computing Embedded Linux Raspberry Pi Software Architecture
  • SMBS
    Digital Health Lecturer
    EDUCATION AND E-LEARNING
    October 2025 - Today (8 months)
    Lyon, France
    Design and delivery of courses on digital health (digital healthtech, e-health, general culture and ethics in health) for students from undergraduate to master's level.
    Digital Health e-health Training Consulting
  • ESCAET
    Rust Developer — Real-time Access Control System
    EDUCATION AND E-LEARNING
    July 2025 - September 2025 (2 months)
    Aix-en-Provence, France
    Design and development of a real-time access control system deployed in production.

    Rust backend architecture with bidirectional WebSocket communication, access rights management, hardware integration.

    Deliverables:
    High-performance Rust/Axum backend with real-time WebSocket communication
    Rights management and authentication system
    Integration with on-site access control hardware
    Production deployment, system in active service

    Stack: Rust, Axum, Tokio, WebSocket, PostgreSQL, Linux
    Rust Axum Websocket Back-End Development Real-time

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Education

  • Software Developer
    Openclassroom
    2025
  • Full-Stack Developer
    Le wagon
    2023

Skill set

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