About Guillaume Stehelin de Taisne – Part-time CFO & COO

Fractional CFO/COO and entrepreneur for funded scale-ups and family offices, with deep hands-on experience in critical situations.

15+ years of experience in financing, hypergrowth and crisis

Domaines d'expertise

Une approche complète pour accompagner votre croissance

Structuration financière

Mise en place de tableaux de bord, reporting et processus financiers adaptés à votre croissance.

Levées de fonds

Accompagnement complet de la préparation à la négociation, de Seed à Series B.

Optimisation opérationnelle

Structuration des processus et des équipes pour gérer l'hypercroissance.

Scaling et hypercroissance

Stratégies et outils pour maintenir la performance lors de la croissance rapide.

Parcours professionnel

15+ années d'expérience en restructuration d'entreprises et gestion de crise

1
2025-
4 réalisations clés

Founder - Moverz

Founder of Moverz, a photo-based moving estimation tool. The goal: automate quotes and logistics planning with a service operated almost entirely by systems (AI, automation) rather than large teams.

Photo-based moving estimation
Largely automated customer journey
Finance/ops architecture built into the MVP
Product built alongside fractional CFO/COO work
2
2021-2025
4 réalisations clés

Co-CEO & Co-Founder - Ligerio

Leader in online sales of distinctive floor and wall coverings in France. From €0 to €10M turnover in 4 years. Exceptional growth: 50% to 100% per year for 3 consecutive years. Operational efficiency: logistics flow x20 in 3 years without increasing staff.

From €0 to €10M in 4 years
50-100% annual growth
Logistics flow x20
AAA team recruited and trained
Suite du parcours

+5 autres expériences

15+
Années d'expérience
50+
Entreprises restructurées
€100M+
CA géré cumulé
550+
Employés supervisés

Entreprises accompagnées

Des entreprises de renom m'ont fait confiance pour leur croissance et leur structuration

Logo Jumia
JumiaE-commerce panafricain
Logo HelloFood
HelloFoodLivraison de repas
Logo Ligerio
LigerioBTP et construction
Logo Aunis Ramonage
Aunis RamonageServices techniques
Logo Kaymu
KaymuMarketplace e-commerce
Logo Glossybox
GlossyboxBeauté et cosmétiques
Logo Orami
OramiMaternité et bébé
Logo Securclés
SecurclésTech clés à distance brevetée
Logo Jaiye
JaiyePlateforme digitale
Logo Lamudi
LamudiImmobilier en ligne
Logo Lexolia
LexoliaSolutions digitales
Logo Petloft
PetloftServices pour animaux

Et bien d'autres entreprises dans différents secteurs...

12+ entreprises accompagnées

Mon approche

I am a fractional CFO/COO and entrepreneur. For the past 15+ years, I have stepped into complex situations: hypergrowth, restructuring, blocked operations, weak governance. I have operated in demanding environments at Jumia, Glossybox, Orami and co-founded Ligerio (from 0 to ~€10M in revenue in 4 years). My edge: I don’t stop at spreadsheets and board decks. I design and implement systems – finance, operations, data – using technology and artificial intelligence. I personally build internal tools (TypeScript, AI, automation) and work daily with product and tech teams. To deepen this further, I am currently studying Computer Science at Harvard (since 2025), strengthening my understanding of modern systems, data and AI. My role: a C-level who fluently speaks P&L, product, data and technical architecture.

Guillaume Stehelin de Taisne – Part-time CFO & COO
G

Guillaume Stehelin de Taisne

Part-time CFO & COO – Consultant Opérations Coup de Poing

Voir le profil LinkedIn

My view on technology as a CFO/COO

In many companies, tech is still treated as a silo: a separate department that “receives requests” from the business and ships projects with varying alignment.

My view is different: to perform today, a C-level must deeply understand technology. Not to code everything, but to think in systems: data flows, automation, product constraints, architectural costs.

As a CFO/COO, I don’t just ask for dashboards or “tools”. I co-design, with the teams, a real operating system for the company: finance in real time (cash, margins, runway), end-to-end visibility on operations (order → collection → disputes), internal tools that automate everything that does not require human judgment.

This is why I build tools myself (TypeScript, AI, automation) and why I’m currently studying Computer Science at Harvard: to speak the language of developers, data scientists and product founders, while staying fully accountable for P&L and cash.

What I actually build

My work doesn’t stop at slides and action plans. Together with the teams, I build concrete tools that run every day inside the companies I support.

On the finance side: consolidated reporting systems, real-time cash projections, automatic alerts on margin or cash deviations, runway forecasts connected to the commercial pipeline.

On the operations side: unified flows for orders / inventory / disputes / support, performance tracking by team, country, channel, and automation of repetitive tasks (follow-ups, checks, approvals).

On AI and automation: internal assistants answering finance/ops questions in natural language, risk or priority scores to focus teams on high-impact cases, AI routines cleaning data and stabilizing reporting.

Recent projects (non-confidential version)

Below are a few examples of recent projects, described at a generic level to protect confidentiality. The goal is to show the types of problems I work on and the systems I design.

Moverz – A service operated almost entirely by AI

Moverz is a project designed to compete with highly profitable incumbents born around 2015 in its space, rebuilt from scratch with full AI and automation. The ambition: deliver the same – or better – service than a profitable 50-people company, with no employees, powered only by internal systems and advanced automation. My role: economic model design, finance/ops systems architecture, and definition and supervision of internal tools and AI automations.

Internal finance tools for a B2C scale-up

Context: funded B2C scale-up with slow reporting, partial cash visibility and heavy dependence on local Excel files. Actions: implementation of a single reporting and cashflow system, automation of data collection (accounting, bank, CRM), creation of alerts on margin and cash deviations. Result: daily visibility on cash and runway, drastic reduction of time spent consolidating numbers, better preparation for investor discussions.

Operating system for a services company

Context: services company with fragmented operational flows (CRM, industry-specific tool, support tickets) and no global view on service quality. Actions: full mapping of flows (from first contact to final payment), design of an internal “OS” centralizing orders, interventions, disputes and collections, automation of follow-ups, notifications and quality checks. Result: fewer frictions for teams, less dependence on key individuals, measurable and controllable service quality.