Freelancer profile translated to English.
Back to original languageAbout Guillaume
Senior Business Analyst with 15+ years of experience, including nearly 10 years in complex and regulated environments: Airbus, Alstom, Proximus.
I help teams clarify fuzzy requirements, secure scoping, align stakeholders, and advance the product to a usable delivery. I am particularly effective when the domain is demanding, the flows are complex, and errors are costly.
My positioning on Malt: Senior BA / Business Analyst with a strong technical sensibility. I can handle functional scoping, workshops, user stories, functional and technical specifications, process modeling, and impact analysis, and then go all the way to delivery when the project needs a profile capable of executing.
What I do most often:
- Functional scoping, requirements gathering, business workshops, user stories, backlog, prioritization, formalization of rules and user journeys
- Functional and technical specifications, BPMN/UML, impact analysis, traceability, coordination with PO, devs, QA, and business
- Technical Business Analysis: APIs, integrations, data mapping, inter-system synchronization, operational tooling
- End-to-end delivery on critical components: Python/FastAPI backend, automation, documentary workflows, prototypes, and production deployment
Some references:
- Proximus: Senior Business Analyst on a B2C platform redesign for 2M+ users, scoping and cross-functional coordination over 70+ sprints
- Alstom: Functional Analyst on ERTMS/ETCS SIL4 certified systems, specifications, traceability, and zero defects in production
- Airbus Helicopters: Product Owner on certified mission planning tools for civil and military fleets
Based in Marseille | 100% remote | Available for short missions (5–30 days) as well as long-term commitments
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- DHLAutomated Customs Classification (RAG)TRANSPORTATIONNovember 2025 - December 2025 (1 month)Marseille, FranceDesign and development of a RAG system to accelerate and improve the reliability of customs classification (HS code assignment) based on product descriptions and repositories.Missions / Achievements:- Implementation of a RAG pipeline: ingestion + chunking, embeddings, indexing, and retrieval (Qdrant)- Setup of hybrid retrieval (similarity + keywords) and an LLM reasoning layer- FastAPI API for real-time classification and explainable outputs (justification of choices)- Industrialization: dockerization, CI/CD practices, structured logs, quality safeguardsResults:- 92% accuracy in HS code assignment (internal test set)- Approximately 70% reduction in manual classification time
- Cabinet ComptableSecure Document PortalPRIVATE EQUITYMarch 2025 - June 2025 (3 months)Marseille, FranceDesign and development of a web application enabling clients to upload, share, and view documents smoothly and securely, with a strong focus on performance, access rights, and compliance.Missions / Achievements:
- Frontend Architecture: Design of a modern and fast UI with Astro + Svelte (islands approach, minimal loading, excellent perceived performance).
- Security & Access: Implementation of an authentication flow and fine-grained permission management via Supabase (access control, separation of client spaces).
- Document Management: Organization of documents by client/folder, upload/viewing process oriented towards accounting uses, and consistent visibility rules.
- Infrastructure & Delivery: Docker containerization, deployment on Vercel, continuous integration, and managed environments for fast and reliable delivery.
- Compliance / Sensitive Data: Implementation of GDPR best practices (minimization, traceability, access control, hardening of storage/sharing rules, privacy by design).
Results:- Simplified client access to documents, reduced collection friction, and better control over access rights.
- Rapid delivery of a robust, maintainable, and scalable tool (new document types, access rules, workflows).
- OstéopatheShowcase Website with Integrated BlogHEALTH AND WELLNESSFebruary 2025 - March 2025 (1 month)Marseille, FranceCreation of a high-performance website combining corporate presentation and dynamic blog for an osteopath specializing in animal care.Results Achieved:
- Optimal Performance: Lighthouse scores >95 with ultra-fast loading times
- Technical SEO: Optimization for excellent natural referencing
- Automated Workflow: Simplified blog content management with automated publishing
- Modern Design: Responsive interface adapted to all devices
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Education
- Master of IT Project Management4IM2011