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Jean-Baptiste D.JD

Jean-Baptiste D.

Fullstack Developer | Symfony, JavaScript, Swift

€550/day
Rennes, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jean-Baptiste

Experienced senior developer in various business areas and technologies, I support your projects in digital transformation at scale. My choices are based on very specific directions:

Quality: Aiming for excellence makes the difference. I apply the most renowned standards and conventions (W3C, WHATWG, SOLID, DSP2...) to address issues of security, execution cost, maintenance, scaling, high availability, and responsiveness. These standards, the result of years of experience from recognized companies and experts, provide clear and reliable solutions.

Efficiency: Faced with the diversity of tools and languages, I favor a limited selection, adapted by domain, and remain curious about their evolutions. I work with proven tools and stay informed.

Availability: Application traffic is unpredictable. It must be available at all times. Cloud solutions allow for automatic scaling with adapted, redundant, and secure infrastructure.

Observation: Failures happen. It is crucial to react quickly. OpenTelemetry instruments my deliverables to obtain quality logs, metrics, and traces.

Cost: Expensive infrastructure does not add value if it is maintained by oneself. I favor serverless solutions with AWS and its pay-as-you-go model to reduce costs.

Innovation: I encourage the use of Swift. Created by Apple, Open Source, its dynamic community develops it on Linux. Compiled, its performance is close to C, with added security. Its low memory consumption is a major asset. Usable in embedded systems, for Android development, and offering interfaces with C, C++, and Java, I believe it is a language of the future to unify languages and skills.

Architecture: I prefer containerization of orchestrated and tested microservices over monoliths, and I support your migrations.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Rennes (up to 50km)

Experience

  • Combodo
    Fullstack Developer
    SOFTWARE PUBLISHING
    July 2025 - July 2025
    Échirolles, France
    Improvement of iTOP ITSM & CMDB configuration tools, in Bash with Docker containers to facilitate deployment.
    Each client has different needs for their software, requiring the installation of different plugins, resulting in numerous configurations.
    My work consisted of creating a guided or parameterized installation tool so that deployments could be automated in a standardized environment with Docker.
    Docker Bash
  • Edenred ProwebCE
    Fullstack Developer
    SOFTWARE PUBLISHING
    January 2022 - January 2025 (3 years)
    Saint-Martin-d'Hères, France
    Development of CSE management software in PHP/Symfony.
    Analysis of a legacy data import tool, and creation of a new configurable ETL to replace it.
    Automation and parallelization of CI/CD tests.
    Improvement of Dockerized infrastructure and monitoring at different levels to enhance the performance of aging tools.
    Symfony Docker JavaScript PHP Doctrine
  • Spartoo
    Fullstack and Mobile Developer
    E-COMMERCE
    January 2019 - January 2022 (3 years)
    Grenoble, France
    Implementation of Apple Pay and Illicado payment systems, maintenance of the Worlday payment module for bank cards.
    Authentication and protection of user data with Sign-in with Apple.
    PHP and JavaScript development.
    Development of white-label applications on iOS and Android, with a common React Native base and integration of the site in webview.
    SEO and deep-linking.
    PHP JavaScript React Native MySQL REST

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Education

  • "React JS"
    Atp Formation
    2018
    "React JS"
  • "Implement a Webmapping portal"
    Makina Corpus
    2015
    "Metre en oeuvre un portail Webmapping"

Skill set

Categories