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Sébastien Le CozSL

Sébastien Le Coz

Fullstack Web Developer

€650/day
Luxembourg, LU
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Sébastien

Specialized in enterprise solutions, I have worked for many years in health insurance and digital archiving (digital safes) for large accounts.
User interfaces, ergonomics, large data volumes, application security, test protocols for better quality deliverables.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Luxembourg (up to 40km)

Experience

  • BNP-Paribas
    Lead Developer
    BANKING AND INSURANCE
    February 2023 - February 2026 (3 years)
    Paris, France
    Refactoring of applications for a leading banking group
    - Participation in the refactoring and modernization of 30 web applications dedicated to human resources management for one of the main French banking groups.
    - Analysis of business needs, technical design, and implementation of new functionalities while ensuring compatibility with existing tools.
    - Optimization of application performance to improve user experience and facilitate internal HR team processes.
    - Collaboration with multidisciplinary teams in an Agile environment (Scrum/Kanban).
    - Strict adherence to security, confidentiality, and professional secrecy standards.
    PHP MySQL JavaScript jQuery Webservice
  • DOCAPOSTE - groupe La Poste
    PHP Development Engineer
    TELECOMMUNICATIONS
    March 2016 - October 2022 (6 years and 8 months)
    Paris, France
    Large Account Archiving Business Unit
    Hired in the Client Application Department after a 6-month assignment via an IT consulting firm, I participated in the version upgrade of the AES product, a cloud solution for digital archiving in safes. This solution allows large corporate clients to retrieve digital archives. As part of these version upgrades, I participated in the following projects:

    - Development and customization of PHP solutions (dedicated features)
    - Development and integration of SSO connection modules (Simple SAML)
    - Writing WSDL files and integrating SAOP webservices
    - Development of four-level confidentiality modules (PHP / JS / MySQL)
    - Optimization of very large databases (over 4GB, over 1 billion entries)
    - Refactoring and integration of a new user interface (HTML 5 / Bootstrap)
    - Maintenance and bug fixing, Jira / Mantis / Redmine tickets
    - Implementation of acceptance tests (Codeception)
    - Setup and configuration of Docker containers (DockerFile / docker-compose)
    - Writing technical specifications for clients
    - Participation in numerous internal training sessions:
    + Unix
    + ElasticSearch
    + MySQL Tuning
    + PHPUnit
    + Symfony (at SensioLab)
    + AngularJS
    + GDPR
    + ITIL V3 Certification
    PHP Javascript Docker SOAP Elasticsearch
  • Auxia groupe Malakoff Mederic
    PHP Development Engineer
    BANKING AND INSURANCE
    June 2014 - March 2016 (1 year and 9 months)
    Paris, France
    Assigned by an IT consulting firm, I joined a team of PHP developers in collaboration with the C# team to evolve the death insurance contract subscription solution for our clients.
    Thus, I participated in the following projects:

    - Development of new PHP features for the contract subscription solution (Symfony-type PHP Framework)
    - Implementation of PHP SOAP webservices
    - Development of numerous reports related to the insurance sector (PHP MySQL FPDF)
    - Bug fixes, Mantis tickets
    - Evolution of the contract subscription interface (HTML 5 / JS / JQuery, management of numerous input fields, as well as the implementation of form management rules)
    - Configuration of Apache web servers / creation of Debian Linux VMs (VMWare / VirtualBox)
    - Creation and architecture of a new internal ticketing tool in PHP / MariaDB / HTML5 / Bootstrap
    PHP Mysql Javascript SOAP

Recommendations

FU
FU
Former user and 1 other person have recommended Sébastien

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Education

  • ITIL
    Professional Training
    2019
  • ElasticSearch
    Internal Training (Docaposte)
    2018
    Apprentissage des bases de l'utilisation d'ElasticSearch

Skill set

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