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Louise SoulierLS

Louise Soulier

Backend Developer

€400/day
Strasbourg, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Louise

Backend developer with several years of experience, I specialize in bug fixing, refactoring existing code, and stabilizing production applications.

I primarily work on existing projects: unstable APIs, blocking bugs, performance issues, technical debt, code that is difficult to maintain or evolve.

I enjoy quickly understanding an existing system, identifying the root causes of malfunctions, and proposing simple, clean, and sustainable solutions without over-engineering.

I prefer short, well-defined assignments with clear objectives and concrete deliverables (bug fixed, module refactored, technical recommendations).

Available in the evenings and occasionally, I am particularly comfortable with targeted interventions:
– backend bug fixing
– refactoring of services or modules
– performance improvements (queries, APIs, asynchronous processing)
– production problem analysis and resolution

Clear communication, pragmatic approach, and respect for deadlines.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Thinkfab
    Web Developer
    January 2021 - November 2025 (4 years and 10 months)
    PHP 7 and 8 backend developer
    • - Design of applications in the health sector (appointment booking, report writing, patient care pathway) and human resources
    • - Full responsibility for the design and implementation of applications, from setting up the technical stack (docker/docker-compose), installing the framework (Symfony 4 to 7), creating the data model, implementing REST APIs (api platform, interacting with a React front-end) and business logic, setting up fixtures and unit tests (postman and phpunit), continuous deployment (via Bitbucket), and production deployment.
    • - Design of classic Symfony web applications with front-end development in HTML/CSS/JS (jQuery) via Twig, and back-end on a CRUD model
    • - Maintenance and bug fixing of Symfony 4 applications (with implementation of business evolution or new features)
    • - Application migrations (PHP and Symfony version upgrades), with application refactoring and implementation of legacy data import systems.
    • - Development of interfaces between external and internal health applications when a Restful API solution was not feasible (interface between care pathway and patient record applications, interface between laboratory software and medical reporting application)
    • - Design and maintenance of internal Symfony bundles within the company (historization, document generation, database backup, management of a Symfony console command cron)
    • - Assistance in the maintenance of staging and production servers under Debian, and their databases (MySQL, Postgresql, and MongoDB)
    • - Welcoming and supervising web development interns, skills=[]
  • Codéin
    Research and Development Engineer
    December 2025 - Today (6 months)
    Strasbourg, France
    Full-stack developer on PHP/Symfony & Ibexa web applications, maintenance, refactoring, and evolutions
    PHP Symfony Ibexa Docker

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Education

  • Doctorate in Medicine, DES Cardiology and
    Paris Descartes University
    2018
    Doctorat en Médecine, DES Cardiologie et
  • Digital Architect
    École 42 Paris
    2021
    Architecte du numérique

Skill set

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