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Guillaume GagnerotGG

Guillaume Gagnerot

Full stack developer | Custom site/app

€490/day
1 project
Brive-la-Gaillarde, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

Do you need a reliable website or web application that truly works for your business, not just another cobbled-together "showcase site"? That's exactly where I come in.

I've been a developer and IT project manager for over fifteen years. I design, build, and evolve custom websites and web applications for companies, local authorities, associations, and research centers.

**Specifically, I can help you to**:


  • Create or revamp a professional, clear, fast, and well-structured showcase site for natural referencing (SEO);
  • Transform spreadsheets and manual procedures into a business web application (case management, internal portal, client area, dashboard, etc.);
  • Secure and make existing tools reliable, improve their performance and response times;
  • Prepare your data and content for the future integration of artificial intelligence (AI) modules.


**What sets me apart**:


  • Custom development, without dependence on a standard content management system: no unnecessary layers, no platform-related constraints;
  • Dual profile of full-stack developer (front-end and back-end) and project manager: I speak technical, but also business needs, organization, and real-world constraints;
  • Experience in machine learning and sensitive information systems, which requires me to work meticulously on security, data structure, and reliability.


**The deliverables I most often handle**:


  • Complete showcase and institutional websites;
  • Business web applications with user accounts, complex forms, data exports;
  • Custom portals and client areas;
  • Technical optimization (performance, security, referencing) of existing tools.

Explain your business, your goals, and your constraints to me: I'll help you translate all of that into a concrete, useful, and durable web tool.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

Remote only
Primarily works remotely

Experience

  • HexaForge
    Senior Project Manager
    DIGITAL AND IT
    November 2025 - Today (7 months)
    Brive-la-Gaillarde, France
    Do you need a reliable website or web application that truly works for your business, not just another cobbled-together "showcase site"? That's exactly where I come in.

    I've been a developer and IT project manager for over fifteen years. I design, build, and evolve custom websites and web applications for companies, local authorities, associations, and research centers.

    Specifically, I can help you to:

    • Create or revamp a professional, clear, fast, and well-structured showcase site for natural referencing (SEO);
    • Transform spreadsheets and manual procedures into a business web application (case management, internal portal, client area, dashboard, etc.);
    • Secure and make existing tools reliable, improve their performance and response times;
    • Prepare your data and content for the future integration of artificial intelligence (AI) modules.

    What sets me apart:

    • Custom development, without dependence on a standard content management system: no unnecessary layers, no platform-related constraints;
    • Dual profile of full-stack developer (front-end and back-end) and project manager: I speak technical, but also business needs, organization, and real-world constraints;
    • Experience in machine learning and sensitive information systems, which requires me to work meticulously on security, data structure, and reliability.

    The deliverables I most often handle:

    • Complete showcase and institutional websites;
    • Business web applications with user accounts, complex forms, data exports;
    • Custom portals and client areas;
    • Technical optimization (performance, security, referencing) of existing tools.

    Explain your business, your goals, and your constraints to me: I'll help you translate all of that into a concrete, useful, and durable web tool.
    Web application development AI integration Full-stack development IT security SAAS
  • TMLC SAS
    Associate
    DIGITAL AND IT
    December 2016 - May 2019 (2 years and 5 months)
    Vertou, France
    **2016 - end of 2017**: Company dedicated to creating showcase sites and e-commerce.

    **2018 - May 2019**: Research and development of machine learning algorithms – poker application programmed to be trained via: Reinforcement Learning (Markov Decision Process), deep neural network, and evolutionary algorithm (in JULIA).
  • Centre for Social Sciences and Humanities (CSSH)
    Information System Expert
    RESEARCH
    June 2013 - June 2015 (2 years)
    New Delhi, India
    In charge of the IT department (team of 3).
    Respond to the technical needs of researchers and administrative staff (40 people).
    Manage communication (Website/conference organization/social networks...)
    System improvements (hardware / software) - DNS, firewall, Linux servers, IT equipment renewal.

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Education

  • Specialized Master's degree in Computer Science and Project Management
    ESAIP Angers
    2011
    Master chef de projet international, gestion de projet à l’international. Management (Scrum), communication, conduite de réunion, gestion. Cursus à l’international: 2009 / Hongrie : BMF Budapest Polytechnic. Programme Erasmus. English business, système d’opération (linux), programmation web (php,sql) et C# (Object-Oriented) 2010 / Allemagne : Ecole supérieure d’informatique, HTWK Leipzig Allemand, SAP, C 2010-2011 / Suisse : BFH Bern Haute école spécialisée Bernoise (Suisse). Business interculturel, gestion qualité et risques, optimisation, software engineering (SCRUM) Fin Master de technique, informatique et gestion de projets.

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