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Cornelius CellierCC

Cornelius Cellier

Shopify Developer | Shopify Consultant

€400/day
1 project
Paris, FR
3-7 years
Développeur Shopify
Python
Liquid
Automatisation
Expert Shopify

Average response time: 1 hour

Freelancer profile translated to English.
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About Cornelius

As a Shopify expert, I am involved in the entire lifecycle of your e-commerce projects:
  • Shopify Storefront
  • Connectors and automations
  • Shopify Apps / backend
  • Infrastructure maintenance
  • SEO optimization
Pragmatic and collaborative, I integrate with your teams to manage complex projects or handle specific developments, with the goal of performance and scalability for your e-commerce ecosystem.
Retail (Small Business)
E-commerce
Software Publishing
Laundry, Home Care and Personal Care
Luxury Goods

  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Paris (up to 50km), Grenoble (up to 10km), Biarritz (up to 50km)

Experience

  • EDF
    Data & Automation
    ENERGY AND UTILITIES
    September 2024 - August 2025 (11 months)
    Brussels, Belgium
    • Implementation of data products (AWS S3, Snowflake, dbt, Airflow)
    • Coaching and training on automation projects for the finance department (MS Power platform)
    • Management of a Machine Learning project (group AI initiative) for B2B lead generation in collaboration with the Risk department
    Python
  • PIGEON groupe
    Shopify Consultant
    E-COMMERCE
    February 2023 - August 2024 (1 year and 6 months)
    • Built custom storefront sections and features
    • Automated marketing and stock processes: shopify apps (python), shopify flow
    • Built custom ERP-shopify connector, (documentation, project handover and KT)
    • Multi-market content coordination (translation and creation), global Shopify plus
    • Web analytics: GTM & GA4 tracking setups
    • API & System Integrations: Developing custom connectors for ERP, CRM, and other third-party systems.
    Liquid Automatisation Expert Shopify Développeur Shopify Python
  • Consultant
    Consultant - Shopify Expert
    E-COMMERCE
    November 2022 - July 2024 (1 year and 8 months)
    Paris, France
    • 1.5 years as a shopify consultant for various industries (paramedical, fashion, cosmetics..)
    • Custom Shopify Storefront, custom Shopify apps
    • Data engineering and migrations, Shopify APIs
    • Web analytics setup (ga4, gtm)
    • Pagespeed optimization
    • Market & content management (Shopify plus)
    • References : on demand
    Expert Shopify Développeur Shopify Liquid Remix GraphQL
Check out Cornelius's experience

Reviews

5.0

Out of 1 rating

F

François

Bonnemaniere.fr

Reviewed on 10/16/2025

Fast, efficient, reliable. Delicate mission to develop a very specific connector between Shopify and a supplier's system. Cornélius delivered a functional and efficient tool, and is ensuring its follow-up. We will work together again on specific automation and custom development topics.

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Education

  • MSc in Data analytics & AI
    EDHEC
    2022
    PGE (tronc commun) Spécialisation data & ai
  • Bachelor's degree in Mathematics and Computer Science
    University of Lille 1
    2018

Certifications

  • Data Engineering Summer School
    Dataminded
    2024
    Airflow Docker PySpark DBT Polars Snowflake

Skill set

JavaScript
FastAPI
Microsoft Power BI
Alteryx
Remix
GraphQL
SEO Shopify
Application Shopify

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