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Guillaume BerengerGB

Guillaume Berenger

Senior Product Manager | E-commerce & Agile

€600/day
Bordeaux, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Guillaume

Unclear roadmap. Misaligned teams. Stalled delivery. Building a product organization from scratch.
That's exactly where I come in.

Senior Product Manager with 12 years of experience in high-traffic B2C/B2B digital products, I help leadership transform business challenges into actionable product strategy, from framing to delivery.

What I bring concretely:
  • Structuring or redesigning product organization and Agile practices
  • Managing e-commerce performance: conversion, user journeys, regular delivery
  • Data-driven prioritization and roadmap arbitration aligned with strategic objectives

Some results:
  • +0.15pt CVR on an e-commerce platform with +70% traffic
  • Product organization built from scratch at a French Tech Next 120 scale-up
  • Capacity management of an IT department tribe: 180 FTEs, 80+ projects across 16 teams

I work on a time and materials or fixed-price basis, in Bordeaux/hybrid, Paris mostly remote, or fully remote in France/Europe.
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Basic

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

Experience

  • CULTURA
    Product Owner - Field & POS Android Application
    RETAIL (LARGE RETAILERS)
    April 2025 - November 2025 (7 months)
    Mérignac, France
    Context
    Tasked with overseeing the Back/Front-end evolution of a critical field application, in preparation for the deployment of an SAP ERP. Specialized retail chain, 100+ stores, 1,400 users (sales advisors).

    Field Application — 1,400 Users (Department Managers)
    • UI Redesign: supplier return process, price and promotion management
    • Feature flipping deployment
    • ERP-compliant functional scoping for all APIs (data structure migration) — 90% validated, deployment planned
    POS (Self-Checkout Systems)
    • User account login screen redesign
    • GDPR compliance — Deployed in production
    • Loyalty benefits display integration
    Product management Agile methodology Mobile Application Project management Retail
  • Ultra Premium Direct
    Product Manager - E-commerce Platform
    RETAIL (SMALL BUSINESS)
    January 2022 - January 2024 (2 years)
    Bordeaux, France
    Context
    Product transformation mission for a fast-growing e-commerce scale-up (+70% traffic). Objective: structure the product organization from scratch and take over an e-commerce stack post-redesign, in a context of hypergrowth and international expansion.

    Product Performance
    • Front & back-end management: +0.15pt CVR (5.46%) despite +70% traffic
    • Discovery/data workshop facilitation → 2 funnels optimized at 14% and 19% conversion
    • Saved 1.5 FTE in customer service through self-care automation
    Structuring & Delivery
    • Implementation of Agile organization and Product team (0 to 1)
    • Multi-country deployment (FR, BE, IT)
    • Sylius back-end / headless Strapi front-end integration

    Technical Environment
    Sylius · Strapi · Akeneo · ContentSquare · Power BI · Figma
    Product management E-commerce Scrum User Experience Design Sylius
  • MalakoffHumanis
    Product Owner Consultant - Internal Pricing Management Application
    BANKING AND INSURANCE
    May 2021 - February 2022 (9 months)
    Paris, France
    Context
    Tasked with coordinating business and developer efforts on the scoping and development of an internal pricing renewal tool. Acting as a replacement for the Scrum Master on an existing product team. Major insurance/mutual insurance account.

    Missions
    • Backlog structuring and product scoping in coordination with business teams
    • Alignment between technical and business teams on priorities and trade-offs
    • Facilitation of Agile ceremonies and streamlining of delivery
    Product management Scrum Banking and insurance Agile methodology Project management

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Education

  • PUBLIC SPEAKING
    Stafff.fr
    PRISE DE PAROLE EN PUBLIQUE
  • CONTENT SQUARE CERTIFICATION
    ContentSquare academy
    2023
    CERTIFICATION CONTENT SQUARE

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