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Guillaume GolayGG

Guillaume Golay

Fullstack Developer | Angular | Node.js | Rust

€600/day
2 projects
Toulouse, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

Senior fullstack developer, expert in SaaS design, I have been involved in the creation of complex platforms for various sectors: logistics (GLS, Cargo), aeronautics (Airbus, CNES), IoT (Sensinov, ABB)

With over 15 years of experience, I am involved in the design, development, and redesign of applications on all types of media: web, desktop, and mobile.

🚀 I focus on creating performant and maintainable applications, with in-depth expertise in modern web technologies:
- Front: Angular, Vue.js
- Back: Node.js, NestJS, Java/Spring Boot
- Desktop/Mobile: Electron, Tauri, Flutter
- Optimization: Rust, Go

🛠️ Autonomous, rigorous, and versatile, I can work on the entire stack:
from architecture to user interface, with a constant focus on code quality and user experience.
I have notably:
- Modernized legacy applications (e.g., migration Angular 14 → 17 for Sensinov)
- Developed embedded software (ABB — Angular on proprietary hardware)
- Designed software packages for regulated environments (Airbus — test management)
- Created satellite control tools (CNES — Electron/React)

💡 With extensive tech knowledge, I am also interested in lower-level and cross-platform languages like Rust, Go, or Flutter — to meet optimization, lightweight, or portability needs.
I have notably developed an open-source reverse proxy in Rust (Quark), available on GitHub — designed to be performant, secure, and easy to configure.

📍 Based in Toulouse, I am available for remote work or on-site, depending on needs.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Toulouse (up to 50km), Paris (up to 50km), Lyon (up to 50km), Montpellier (up to 50km), Lille (up to 50km)

Experience

  • Acentori
    Freelance Full Stack Developer
    TECH
    July 2019 - Today (6 years and 11 months)
    Toulouse, France
    Acentoriis a sole proprietorship that I founded to manage my **freelance activity**, while also developing personal projects with a more R&D focus.

    Through this entity,I provide servicesand design applicationsprimarily based on modern web technologies**, intended to run in a **browseras well as inspecific environmentssuch asdesktopor **mobile**, depending on project needs.

    I handlecomplete technical services**, from **designtoimplementation**, working **remotelyoron-siteaccording to client or project constraints.
    Typescript Angular Electron Nuxt.js Rust
  • SENSINOV
    Senior Software Developer
    SOFTWARE PUBLISHING
    December 2023 - March 2024 (3 months)
    Labège, France
    Migration and evolution of Sensinov's IoT platform. Environment: Angular 14 → 17, GraphQL, Docker, GitLab

    Mission
    As part of Sensinov's technical team, I contributed to the evolution of the IoT management platform by ensuring a technological transition to Angular 17, while improving the structure and maintainability of the main application.

    Contributions

    *Progressive migration of the Angular platformfrom version 14 to 17, with attention to component compatibility and adoption of new framework features.

    *Partial redesign and improvementof Sensinov's main application to modernize the front-end architecture and optimize performance.
    • **Implementation of scalable technical solutions**, facilitating temporary coexistence between old and new components during the transition phase.
    *Skill enhancement of the teamon Angular 17: technical support, sharing best practices, and integrating tools like Storybook to improve component documentation and visualization.

    Technical Stack
    TypeScript, HTML, SASS – Angular, Storybook, Node.js, GraphQL – Docker – GitLab
    Angular Node.js GraphQL REST PrimeNG
  • CARGO groupe
    Senior Front-end Developer
    LOGISTICS AND SUPPLY CHAIN
    October 2024 - March 2025 (5 months)
    Toulouse, France
    Reinforcement of the development team – Industrial project for Groupe Cargo (Cargolog). Environment: Angular, .NET, Azure DevOps – PWA for logistics platforms

    Mission
    As part of the finalization of a strategic project within Groupe Cargo, I joined the development team to strengthen delivery capabilities and support the production rollout of a suite of Angular applications (PWA) for Cargolog logistics platforms.

    Contributions

    *Takeover, improvement, and optimizationof existing Angular applications to ensure their stability, maintainability, and performance.

    *Refinement, breakdown, and estimation of technical taskswithin an agile process.
    • **Contribution of Angular expertise**, supporting the team on best practices, code structuring, and advanced use of the NGXS library for state management.
    *Participation in the design and developmentof new applications, in response to specifications defined in collaboration with business teams.


    Technical Stack
    TypeScript, HTML, SASS – Angular, PrimeNG, NGXS – .NET – Azure DevOps
    Angular PrimeNG Node.js Nx ngxs

Recommendations

Maxime SarratoMS
FU
Maxime Sarrato and 1 other person have recommended Guillaume

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Education

  • Multimedia Design
    Eracom
    2010

Skill set

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