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Guillaume JuliaGJ

Guillaume Julia

Mobile Developer FLUTTER & Embedded Systems Engineer

€425/day
2 projects
Montpellier, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

🦾 Embedded Systems Development Engineer
📱 Cross-platform application developer for iOS, Android, MacOS, Windows, Linux

My embedded systems skills:
🔎 Study and understanding of the project and company needs
📋 Writing of specifications
🚀 Complete R&D
🛠 Hardware development and prototyping on PCB
💻 Software Development
🔩 CAD
🗂️ Creation of technical documents


My application development skills:
📱 Client applications (Mobile and Desktop)
🎛️ Embedded systems control applications (Mobile and Desktop)
🧑🏻‍💻 Client management applications: CRM and messaging (Desktop)
📊 Statistical monitoring screens (Android TV)
🎓 Training tools (Desktop)
⚙️ Human-machine interfaces (Linux and Raspberry Pi)


🤔 Why hire me?
Thanks to rich experience acquired in various sectors, I have developed solid expertise that allows me to support my clients in the realization of ambitious projects. My profile stands out with a dual competence in embedded systems and mobile and desktop application development, enabling me to offer complete solutions tailored to the specific needs of each project. These two areas of expertise are not only complementary but can also be integrated synergistically into a single project, thus offering a coherent and innovative approach that maximizes the efficiency and performance of the developed solutions.


Technologies:
Application: Flutter / Dart / MySql / Firebase / PHP
Hardware: Microchip / Nordic / Easy EDA / Altium Designer / Mentor Graphics
Software: C / MPLAB X / I2C / UART / BLE
CAD: Autodesk Inventor
  • French

    Native or bilingual

  • Spanish

    Conversational

  • English

    Fluent

Can work on-site
Montpellier (up to 50km), Béziers (up to 50km)

Experience

  • SUDALYS
    Application Developer
    TELECOMMUNICATIONS
    January 2025 - Today (1 year and 5 months)
    Montpellier, France
    Development of business applications for a company focused on telecom network deployment.
    DART / PHP / SQLITE
    Dart Flutter MySQL SQLite PHP Database
  • JL SYSTEM & SOFTWARE
    Sole Proprietor - Embedded Systems Development and Cross-Platform Application Development Engineer
    TECH
    November 2023 - Today (2 years and 7 months)
    Montpellier, France
    Flutter Projects:

    📱 E85 conversion system management app - Flutter iOS & Android
    💼 CRM - Flutter MacOS & Windows
    🎓 Training platform - Flutter Android (tablet) & Flutter Windows
    📊 Statistics TV - Flutter Android TV
    💧 Hydrogen micro-station management HMI - Flutter Raspberry & Flutter Linux
    📟 Kiosk application - Flutter Android (tablet)
    🚢 Marine system management app - Flutter iOS & Android
    📈 KPI management and task automation app - Flutter Windows
    🌐 JL S&S presentation micro-website - Flutter Web
    🛠️ Minor apps - Flutter cross-platform iOS, Android, Windows and MacOS
    Project Management Embedded Systems iOS iOS Development iOS Development Android Android Studio Android Development Mobile Development UI/UX Design Electronics Hardware Software Engineering Software Architecture Research and Development R&D CAD Computer-Aided Design (CAD) Mobile Application
  • biomotors
    Systems Development Engineer
    AUTOMOBILE
    September 2020 - November 2023 (3 years and 2 months)
    Montpellier, France
    Development of E85 superethanol automotive conversion embedded systems.
    Development of Android and iOS applications related to conversion systems.
    Development of internal company management Desktop applications.
    Development of training and supervision tools.
    Development of machine HMIs.
    UI-UX for various applications and tools.
    UI/UX iOS Development Android Android Studio Microsoft Excel VBA Microchip Bluetooth Low Energy mplabx desktop development HMI

Reviews

4.0

Out of 1 rating

W

William

3IL Ingénieurs - Limoges

Reviewed on 4/8/2025

We called on Guillaume due to a last-minute change, for a tricky situation: teaching embedded systems remotely. Even though the context was not easy, Guillaume managed to fulfill this mission. A big thank you to him.

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Education

  • Engineer in Embedded Electrical and Electronic Systems
    CESI TOULOUSE
    2021
  • University Technology Diploma - Electrical Engineering and Industrial Computing
    IUT Montpellier-Sète
    2018

Skill set

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