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Stéphane RathgeberSR

Stéphane Rathgeber

CTO - Expert Technical - PHP - Symfony

€750/day
27 projects
Puteaux, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Stéphane

I am aSymfony Tech LeadandPHP developerwith over 15 years of experience, specializing in backend development and the architecture ofcomplex applications**. I have had the opportunity to work with large companies like **Renaultand **AXA**, as well as startups, which has allowed me to develop a pragmatic and rigorous approach to varied and technical projects.

My expertise:

  • **Symfony**, which I have been using daily since its early versions, particularly its latest iterations (Symfony 4, 5, 6, 7).
  • **PHP**, with a deep mastery of best practices, application performance, and automated testing (unit and functional).
  • DevOps**, with expertise in setting up and optimizing **CI/CD pipelineson GitLab andDockerized deploymentenvironments, promoting fast and reliable project delivery.
I often intervene in missions that require technical upgrades, API integration, or stabilization of existing platforms. Beyond technical skills

Methodology

A lover ofAgile methodology**, I adhere to **SCRUMandKanbanapproaches which allow me to structure projects while remaining reactive to unforeseen events. In my daily work, I place particular importance oncode quality(PSR best practices), solution scalability, and **performance and security optimization**.

What I can offer

  • Solidtechnical expertisein creating and scaling complex applications.
  • Team supportthrough technical coaching and adoption of best practices.
  • A **capacity to resolve complex technical situations**, particularly in terms of performance, backend architecture, and code quality.
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • Japan Experience
    Tech Lead
    TRAVEL AND TOURISM
    November 2025 - Today (7 months)
    Paris, France
    Optimization of the customer journey in close collaboration with the Product Owner. Audit and technical analysis of the existing system, recommendations for optimization and Symfony version upgrades. Technical support for the team: implementation of best practices, code reviews, and skill development for developers.
    Symfony Gitlab Google Cloud Symfony 7
  • France Care
    Part-time CTO / Symfony Developer
    HEALTH AND WELLNESS
    May 2025 - Today (1 year and 1 month)
    Puteaux, France
    Technical leadership of the project and implementation of a complete patient tracking back-office, compliant with GDPR and HDS (Health Data Hosting).
    Role of part-time CTO, with business challenge involvement: defining needs, technical arbitration, prioritization, and team support.

    Integrations performed:
    • Eloquant for call tracking and history,
    • HubSpot and Yousign for file management and signatures,
    • Stripe for patient subscriptions and billing.
    Focus on security, code quality, data flow reliability, and automation in a healthcare environment with strict regulatory constraints.
    Symfony 7 Stripe Hubspot HDS Scalingo
  • Safran Electronics & Defense
    Symfony 7 Developer
    DEFENSE AND MILITARY
    November 2023 - November 2024 (1 year)
    Puteaux, France
    Following the takeover of a back-office project at Safran Optronics, I was responsible for evolving an existing application while considering the challenges of a very limited technical handover. My main role consisted of redefining the tool's architecture and functionality, while ensuring security, a primary concern in this sector.

    Technical Challenges
    • Taking charge of an existing project with little to no detailed knowledge transfer, requiring a deep dive into the code to understand the business and technical logic.
    • Understanding and translating complex technical requirements in a critical environment where data security is paramount.
    • Integrating improvements for better product scalability and maintainability, while ensuring regular updates without service interruption.
    Symfony 7 Symfony PHP8 Docker

Reviews

5.0

Out of 15 ratings

G

Guy

DIMENSION 4

Reviewed on 3/6/2020

Stéphane is a resourceful developer; he took on his mission with great seriousness. It's never easy to integrate into a team, and the feedback from my colleagues is excellent. I highly recommend him.
L

Louis

Brico Brico

Reviewed on 10/9/2023

Recommendations

Mohammed AtifiMA
Nathan CharpentierNC
GB
+1
Mohammed Atifi and 16 other people have recommended Stéphane

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Education

  • BTS - IRIS
    Lycée Blaise Pascal
    2005

Certifications

Skill set

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