Freelancer profile translated to English.
Back to original languageAbout Guillaume
When an IT project is blocked, misaligned, or in permanent firefighting mode, that's often when I step in.
Freelance project manager, 10 years of experience with critical retail systems: checkout, POS, payment processing, and data flows. I take over struggling projects: suspended deployments, overloaded support teams, unstable IT systems.
My method always starts the same way: understand the situation before proposing anything. Seek information where it is: on the ground, in accounting, with the IT department, with management; not just in planning documents. Then, drive with data to make arbitration possible.
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NORAUTO - NATIONAL DEPLOYMENT SUSPENDED, THEN UNBLOCKED
The Openbravo France rollout was halted: unmanageable incident volume, massive escalations, broken trust with stores. I cleaned up the backlog, identified root causes, structured L1/L2 support, and implemented dashboard-driven management.
Result: deployment resumed and completed across 225 stores.
WELDOM - WHEN DATA REVEALS A CONTRACTUAL PROBLEM
Recurring checkout incidents with no visibility. I designed diagnostic dashboards (slow checkouts, failed loyalty flows) that made the problems measurable. The analyses provided to the CDO and CIO demonstrated that the situation could not be resolved without altering the central/franchisee contractual framework.
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What I'm called for: taking over difficult projects • problem management and RCA • structuring L1/L2 support • vendor management • Go-Live and Hypercare • observability and KPIs.
Demanding contexts, multiple stakeholders from field technicians to the executive committee: that's where I'm useful. Let's talk.
English
Fluent
French
Native or bilingual
Can work on-site
Lille (up to 50km), Paris (up to 50km), Bruxelles (up to 50km), Liège (up to 50km), Rouen (up to 50km)
Experience
- WeldomIT Project Manager / Application Lead — Critical Systems & TransformationRETAIL (LARGE RETAILERS)June 2022 - September 2025 (3 years and 3 months)Breuil-le-Sec, FranceOverall management of the Openbravo checkout solution (Weldom/ADEO) for 3 years, independently under CDO/CIO supervision, from scope definition for evolutions to Go-Live and Hypercare. Scope: 3 applications (Openbravo POS, DialogFlow AI Chatbot, Lumiform), internal teams, and international SaaS publishers coordinated in English.RESULTS:- Zero disruption in public invoicing flows (Chorus Pro)- Kafka connector delivered by the publisher outside the contractual scope, obtained by demonstrating its failures through data- Observability concept strategically validated, triggering the recruitment of technical specialistsTASKS:- Application evolutions: defining business needs, technical and functional specifications, end-to-end testing, Go-Live, Hypercare, skills transfer- Critical L2/L3 incidents on the payment chain (POS terminals): Openbravo technical lead- GCP Observability: defining checkout KPIs, specifying and validating IT dashboards- Chorus public invoice compliance: mapping sources and data
- Norauto InternationalIT Project Manager / Problem Manager —RETAIL (LARGE RETAILERS)January 2021 - April 2022 (1 year and 3 months)59810 Lesquin, FranceOpenbravo checkout support overloaded after the France deployment: unmanageable incident volume, massive escalations, broken trust with stores. National deployment was suspended. Mission: restore the situation to normal and resume it.RESULTS:- National deployment unblocked and resumed: 225 branches integrated- L1 support empowered for common cases, L2/L3 escalations reduced- Trust re-established between Helpdesk, project teams, and operational management- Spain Go-Live secured: model validated for the Spanish national rolloutTASKS:- Problem Management: cleaning up the incident backlog, identifying root causes, linking child incidents, defining escalation rules- Data-driven management: monthly dashboards (open/resolved volume, impact per sprint), prioritizing fixes with Product Owners and the publisher- Knowledge Management: knowledge base, procedure writing, training Helpdesk L1/L2 teams- Deployment: Go/No-Go decision support, intensive Hypercare monitoring, on-site Go-Live support in Spain (Valencia), local Ingenico POS terminal configuration
- Norauto FranceIT Analyst — Critical Support & Retail Systems DiagnosticsRETAIL (LARGE RETAILERS)March 2015 - December 2020 (5 years and 9 months)Lesquin, FranceNearly 6 years of on-site IT support for Norauto's critical retail systems: checkout, inventory, CRM, store equipment. The starting point for progressive expertise in POS environments and incident management in demanding operational contexts.
- Support & Diagnostics: inventory, CRM, POS, and critical equipment tools (POS terminals, Android, WIFI). Systematic identification of root causes (bugs, networks, servers).
- Crisis Management: key contact during escalations or dissatisfaction from store management (franchisees and branches).
- Deployment: installation and commissioning of IT equipment during site openings. Securing Go-Lives and Hypercare monitoring.
- Fieldwork: recurring physical interventions in stores (1 to 3 days per trip).
- Training: imparting diagnostic methodologies to new IT team members. Field training for teams in 340 stores (salespeople, mechanics, center managers).
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Education
- 1st year of University Diploma in Technology (IUT) in Electronics, Computer Science, and Industrial EngineeringInstitut universitaire et technologique de rennes20061ère année d'IUT Génie Electronique Informatique et Industriel de
- Diploma from the Brest Military and Naval Preparation ProgramCentre d'Instruction Naval de Brest2005Diplôme de préparation militaire et marine de Brest
Certifications
- ITIL v3 FoundationEXIN2017