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Grégoire PortierGP

Grégoire Portier

Fullstack Developer | React | Node | Typescript

€400/day
Ancenis, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Grégoire

Fullstack Web Developer React | Node | TypeScript - specializing in scientific & laboratory sectors


You are burdened by repetitive and laborious manual processes? I automate them for you to save time.
Your internal tools are outdated or unsuitable? I modernize or replace them.
Your data is scattered across systems that don't communicate? I centralize it in a single tool, designed for your business and traceability.

The Technicals

I develop in Typescript and Python, both in front-end (React.js) and back-end (Express.js, FastAPI...).
I can work on existing legacy projects as well as new projects from scratch.

AI in Our Collaboration

AI enhances my work by auditing my code and proposing solutions, but does not generate code directly (unless requested). I primarily use Anthropic's Claude Code, or Mistral in environments where data sovereignty is a constraint; if necessary, I can completely exclude AI from my process.

Our Agreement

  • Transparency: You know at all times the status of your project and why certain choices were made.
  • Ownership: The code and its documentation belong to you.
  • Mastery: I train you in the use of your new tools so that you can fully adopt them.

My background in laboratory analysis allows me to quickly understand your problems and constraints. Strict standards, audits, metrology, analysis or traceability constraints – I've experienced them before.
Now, I can create the tools to alleviate them.
Your tools.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Ancenis (up to 50km), Nantes (up to 50km), Angers (up to 50km), Rennes (up to 50km)

Experience

  • Tritons
    Fullstack Developer
    SOFTWARE PUBLISHING
    July 2025 - September 2025 (2 months)
    Guyancourt, France
    At Tritons, my mission is to provide my expertise for the development of internal company tools to improve their processes and the services they offer to their clients.

    • Discovery of the company's internal systems (infrastructures, practices, technical stack...)
    • Development of a web application in Python/VueJS with OIDC authentication for tracking the status of various sites hosted on Tritons' architectures
    • Automation, CI/CD, and Kubernetes deployment of the company's sites
    • Refactoring of the Tritons hosting platform architecture, moving from a CRUD architecture to an Event Sourcing architecture
    • TDD development
    • Design of a Domain-Driven Design oriented architecture
    Python Vue.js Kubernetes Event Sourcing Typescript
  • Wessling France
    Analytical Technician in Food Industry
    AGRICULTURE
    September 2021 - June 2023 (1 year and 9 months)
    Les Ulis, France
    Within the Alcohol/Metals team, my mission was to develop new methods for heavy metal analysis, get the laboratory certified for these analyses, then perform daily analyses while participating in the continuous improvement of the laboratory.

    • Creation, establishment, and writing of new operating procedures
    • Establishment and monitoring of test series according to current scientific methods to establish the reliability of operating procedures
    • Creation and adaptation of the work environment (organization, elimination of cross-contamination risks, reduction of human error sources...)
    • Near-autonomous work (sole metals technician in the laboratory)
    • Analysis by ICP (Inductively Coupled Plasma Mass Spectrometry), after sample mineralization
    • Equipment maintenance (first and second level)
    • Document monitoring (writing and maintaining protocols, tracking new standards, evolving specifications)
    • Translation of client needs into actionable solutions
    • Support for other departments in the building (occasional help to the logistics department, advice to the microbiology laboratory, creation of quality and metrology tools...)
    Physicochemical Analyses Food Industry
  • Cerap prévention
    Radiation Protection Technician
    CHEMICAL
    May 2020 - August 2020 (3 months)
    Les Ulis, France
    The mission consisted of bringing our analytical expertise to major nuclear industry clients to analyze their final level of radioactive protection.

    • Analysis in challenging environments (radioactive hazard zones or high noise intensity)
    • Work in a highly specialized team (vital context) with enhanced communication
    • Strict adherence to safety regulations and instructions
    • Constant vigilance, perpetual questioning of systems
    Nuclear Safety

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Education

  • Web and Mobile Web Developer
    École O'clock
    2025
    Développeur web et web mobile
  • First Level in
    INSTN
    2020
    Premier niveau en

Skill set

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