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Gabriel CalmelsGC

Gabriel Calmels

Ruby on Rails Symfony Backend Developer

€600/day
3 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Gabriel

An engineer by training from Télécom Saint-Etienne, specializing in computer science, I started developing during my studies for personal projects and for companies.
I have been developing for over 7 years. I have carried out:
- showcase websites
- marketplaces
- APIs
- e-commerce websites

See you soon on one of your future projects,

Gabriel
  • English

    Fluent

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Anonyme
    PHP Api Platform Developer
    HEALTH AND WELLNESS
    April 2025 - April 2026 (1 year)
    Paris, France
    Improvement of a medical consultation platform.
    PHP development with Symfony, start of ApiPlatform removal, performance improvements notably through SQL query optimization, or the creation of more APIs with shorter responses.
    Creation of a new system for transferring documents using the HL7 standard to interface with clinics
    PHP Symfony Framework API Platform Doctrine Scrum
  • Codematch
    Full Stack Web Developer
    SOFTWARE PUBLISHING
    January 2023 - January 2025 (2 years)
    Lyon, France
    Web Developer on the CodeMatch.fr platform (budget simulator and tech matching):

    - Design and development of the budget and deadline calculation simulator for web projects

    - Implementation of recommendation algorithms for matching with suitable service providers

    - Front-end development (ergonomic and fluid UI/UX) and back-end (business logic, data management)

    - Integration and management of databases / APIs to keep provider information up to date

    - Performance optimization and implementation of tests (unit and functional)

    - Continuous maintenance and evolution of the site (bug fixes, new features, compatibility)

    - Collaboration with project managers and designers to ensure an optimal user experience
    Vue.js React.js Google Analytics Sentry Cloudflare
  • Anonyme
    PHP Symfony Developer
    TRAVEL AND TOURISM
    September 2022 - March 2025 (2 years and 6 months)
    Paris, France
    White label platform for selling/organizing travel.
    PHP development with Symfony, creation of connectors to use external APIs to retrieve availability for trains, planes, hotels, taxis, boats and to be able to purchase them.
    Creation of an orchestrator to leverage PHP fibers for parallel HTTP calls
    PHP Symfony REST APIs API Platform Symfony Framework

Reviews

3.9

Out of 3 ratings

V

Véronique

MESAL

Reviewed on 10/17/2025

Very pleasant to work with Gabriel: available, perfectly understands client issues, responsive, fast execution.

Gabriel has chosen to hide 1 review

1 written review is private.

Recommendations

FU
Romaric PibolleauRP
FU
+2
Former user and 4 other people have recommended Gabriel

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Education

  • Master 2 Entrepreneurship
    IAE Saint-Etienne
    2015
  • Engineering Diploma specializing in Computer Science, Networks and Telecommunications
    Télécom Saint-Etienne
    2015

Skill set

Categories