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Claire NierengartenCN

Claire Nierengarten

Back-end Developer | PHP, Symfony | E-commerce

€480/day
Nantes, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Claire

Back-end developer (PHP, Symfony, Magento)for **over 15 years**, I have worked on **complex technical environments**: multi-brick architectures, significant legacy code, specific functional requirements. These experiences allow me to intervene effectively in various contexts.

I work on the development ofnew featuresas well as on thediagnosis and resolutionof technical problems, including on complex or historical codebases.

Attentive and constructive, Iquickly understand your needsand your challenges, andI dare to challengeyour ideas if necessary to ensure the most suitable solution.

𝗧𝗝𝗠 𝗳𝗹𝗲𝘅𝗶𝗯𝗹𝗲 depending on the duration and nature of the project


  • French

    Native or bilingual

  • English

    Conversational

  • German

    Basic

Can work on-site
Nantes (up to 20km)

Experience

  • Projet Personnel
    Back-end Developer PHP | Symfony 7
    July 2025 - Today (10 months)
    Development of a web application combining blog, portfolio, and encyclopedia, with an administration interface.
    Implementation of advanced forms and setting up an API (API Platform)

    **Stack**: Symfony 7.3, PHP 8, PostgreSQL, Docker.

    Symfony PostgreSQL PHP Docker
  • Freelance
    Back-end Developer PHP | Magento 1&2 | NestJS
    E-COMMERCE
    January 2019 - Today (7 years and 5 months)
    Nantes, France
    E-commerce – French luxury products – International scope – Capgemini (Magento 1)
    • Modified price size to allow Korean price management, with minimal service interruption, handling a high volume of existing data (orders, products, carts...)
    • E-reservation module with light account management and a specific order space for e-reservations
    • Automatic order validation system based on business rules
    • Development of specific modules and bug fixes

    Payment & Fraud Prevention – Specific component of the French luxury products project (AWS, NestJS, PostgreSQL, Lambda, DynamoDB, SQS)
    • Integration and evolution of payment methods (Stripe, WeChat, Alipay, Adyen)
    • Full development of the payment lifecycle (authorization, capture, refund)
    • Design and development of a state machine (xstate, Stately)
    • Functional and technical evolutions
    • Incident analysis and resolution
    E-commerce – Gastronomy, pastry, and chocolateExpertime(Magento 1)
    • Evolutionary and corrective maintenance of the site
    E-Commerce - Wines and spirits - International scope – Expertime (Magento 2)
    • Development of specific modules

    Extranet - Insurance - Ciprés - Sigma Informatiques (Symfony, SQL)
    • Application evolutions

    Magento PHP E-commerce NestJs API
  • Expertime
    Back-end Developer PHP | Magento 1&2
    E-COMMERCE
    May 2018 - January 2019 (8 months)
    Nantes, France
    E-Commerce - Wines and spirits - International scope:
    • Corrective and evolutionary maintenance
    • Multi-site modules
    • ERP interfacing
    • **Stack**: Magento 2, SQL
    E-Commerce - Luxury pastry and gastronomy:
    • Corrective and evolutionary maintenance of the site.
    • **Stack**: Magento 1, SQL
    Magento API E-commerce PHP SQL

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Education

  • Master in Mathematical Engineering and Computer Science
    IUP Avignon
    2007
    spécialité traitement automatique de l'information multimédia, Parcours Innovation et commerce électronique
  • Magento Developer Training
    Magento Academy
    2010

Skill set

Categories