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Discovery & A/B Testing
User interviews, testing and data analysis to uncover real friction points, then experiments that turn results into confident product decisions.
Available now
I Discover products that make impact
Senior Product Manager with 10+ years of experience creating AI-powered SaaS and enterprise products. I transform complex workflows into intuitive, scalable digital experiences.
Product StrategyRoadmappingA/B TestingUser ResearchAgile / SAFeStakeholder ManagementBacklog PrioritizationData-Driven DecisionsProduct StrategyRoadmappingA/B TestingUser ResearchAgile / SAFeStakeholder ManagementBacklog PrioritizationData-Driven Decisions
What I Do
Ways I bring your product vision to life.
Portfolio
Selected Works
2026
Stefcos
Online store for a cosmetics brand for Black and mixed-race skin, built with Claude Code, plus a dashboard that replaces manual order re-entry.
View case studyProduct builder
Product builder◆Stefcos◆Product builder◆Stefcos◆Product builder◆Stefcos◆Product builder◆Stefcos◆Product builder◆Stefcos◆Product builder◆Stefcos◆
2026
Certiphy
Website redesign for an anti-deepfake certification platform: designed on Lovable, shipped on WordPress to stay indexable, with an SEO audit and GEO work.
View case studyProduct builder & project manager
Product builder & project manager◆Certiphy◆Product builder & project manager◆Certiphy◆Product builder & project manager◆Certiphy◆Product builder & project manager◆Certiphy◆Product builder & project manager◆Certiphy◆Product builder & project manager◆Certiphy◆
2023 – 2026
Hello bank!
Product Owner at Hello bank! (BNP Paribas): 5 projects in 3 years, from migrating Orange Bank customers to integrating an e-invoicing tool, in Agile SAFe.
View case studyProduct Owner / Product Manager
Product Owner / Product Manager◆Hello bank!◆Product Owner / Product Manager◆Hello bank!◆Product Owner / Product Manager◆Hello bank!◆Product Owner / Product Manager◆Hello bank!◆Product Owner / Product Manager◆Hello bank!◆Product Owner / Product Manager◆Hello bank!◆
2023
Catenda
New visual identity and multilingual website for a SaaS publisher of BIM collaboration software.
View case studyDigital project manager
Digital project manager◆Catenda◆Digital project manager◆Catenda◆Digital project manager◆Catenda◆Digital project manager◆Catenda◆Digital project manager◆Catenda◆Digital project manager◆Catenda◆
2022
Saint-Gobain
Full redesign of the corporate website: 130+ pages and 20+ custom WordPress templates, from framing to launch.
View case studyDigital project manager
Digital project manager◆Saint-Gobain◆Digital project manager◆Saint-Gobain◆Digital project manager◆Saint-Gobain◆Digital project manager◆Saint-Gobain◆Digital project manager◆Saint-Gobain◆Digital project manager◆Saint-Gobain◆
2018 – 2019
Orange Money
Mobile Money and product strategy (AMOA): Orange Money's strategy and roadmap in Cameroon, Côte d'Ivoire, Senegal and Mali, under executive committee governance, with +30 to 40% on conversion, activation and retention.
View case studyBusiness analyst (AMOA)
Business analyst (AMOA)◆Orange Money◆Business analyst (AMOA)◆Orange Money◆Business analyst (AMOA)◆Orange Money◆Business analyst (AMOA)◆Orange Money◆Business analyst (AMOA)◆Orange Money◆Business analyst (AMOA)◆Orange Money◆
Expertise
I'm highly skilled in the tools that matter.
Jira
Agile planning, backlog prioritization, and sprint execution across every product I ship.
Figma
Reviewing flows, leaving feedback, and collaborating directly in design files with product and design teams.
Claude
AI-assisted research, writing, and product thinking — from user story drafts to synthesizing discovery notes.
GitHub
Versioning every product I build, with automated deployments through GitHub Actions and GitHub Pages.
Supabase
Database, authentication and edge functions behind the back-offices and client portals I ship.
Vercel
Hosting and deploying client websites, with preview links for every change before it goes live.
Product craft
Product vision
Discovery
Roadmap
Backlog
A/B testing
KPIs
My stance
I don't lead to control. I lead to unblock, align and ship.
Experience
10+
years
Products that make an impact
Product vision, roadmap and backlog prioritization: I balance user needs with measurable business goals.
Collaboration
Cross-functional teams
I bring design, tech and stakeholders together, in France and internationally, around shared goals.
With Design and TechClients
Banking, SaaS, mobile payments and industry, from startups to large corporates.
30+Languages
FrenchNative
EnglishBilingual
SpanishBeginner
My process
Discovery
Framing
Delivery
Measure
Iterate
Testimonials
AC
Anthony C.
SEO Director @ Chanel
Working with Ernestine has always been inspiring. She has a rare ability to turn complex business requirements into clear and user-friendly journeys. Her rigor, organizational skills, and ability to listen make her an outstanding project manager who knows how to bring a team together around common goals.
D
Damien
CEO @ Stefcos
What I appreciate most about Ernestine is her global vision of projects. She can speak both the technical and business languages, which smooths communication between all stakeholders. Thanks to her, projects move forward efficiently and with a great sense of calm.
CM
Cédric M.
Marketing Director
The redesign of our website was a large-scale project, with over 130 pages and more than 20 custom templates developed in WordPress. Ernestine managed the entire process, from scoping to launch, ensuring deadlines were met while maintaining outstanding quality. A smooth, professional, and highly effective collaboration.
Products that ship, everywhere
From startups to large corporates, real impact across four continents.
Frequently asked questions
My background, how I work and my availability, in a few answers.
Ready to grow your product?
Whether you're launching a new product or evolving an existing one, I can help. Tell me about your project and I'll get back to you within 48 hours.