Product Optimization
Improve an existing product to unlock growth.
- Identify conversion blockers
- Prioritize high-impact improvements
- Clarify the user experience
Sophie I'll check the analytics we set up together to see where they drop off, and call 3–4 users to understand why.- 6 weeks later
- Day-7 activation31%54% and still climbingTime to activate: 12 → 4 min
Trusted by 
Trained in 
Trained in From product to
business impact. Without friction.
I combine design, data and code to reduce friction, improve adoption and drive growth.
Let's talk about your product
✓ Product design • SaaS development • Integrated strategy
12+ Products launched
€23M Raised by clients with the product* not by me alone.
100% Satisfied clients
Hello, I'm Sophie
Product designer & fullstack developer for 11 years, I help companies design and launch digital products that deliver real results.
My role
Remove the friction between strategy, design and development to turn an idea into a clear, high-performing, useful product.
What makes the difference
I don't "just" design interfaces.
I use data to guide product decisions upstream, to build only what creates value:
My role
Remove the friction between strategy, design and development to turn an idea into a clear, high-performing, useful product.
What makes the difference
I don't "just" design interfaces.
I use data to guide product decisions upstream, to build only what creates value:
→ more users
→ more engagement
→ more business impact
in that order.
→ more engagement
→ more business impact
in that order.
Training & Incubation
They put their trust in me
Antoine Carossio
CTO
YC 2023Sophie anticipates difficulties, which greatly eased our collaboration. She doesn't just create aesthetic designs; she carefully evaluates their impact and feasibility, a valuable asset for any technical team. I recommend Sophie to any company looking for someone able to effectively bridge product, design and development.
Simon Bucquet
CEO
La DéfenseWith Prodju, we now have a product that meets our users' needs and a clear product roadmap. Every step was validated, which saves time and reduces the risk of costly mistakes.
Frédéric Breussin
CEO
La DéfenseI had the pleasure of working with Sophie on our software's user interface. Thanks to her dual expertise in product design and JavaScript development, she designs interfaces that are effective and directly shippable, cutting time-to-production. She delivers UX tailored to user needs, with real product vision, fast.
Ready to work together on your product?
Contact me on LinkedInLet's talk about your productyou'll talk to me, not a salesperson
DESIGN, DATA & CODE IN ACTION
They chose my approach.
From €0 to €21M
raised in funding
raised in funding
+2000 clients worldwide
A solid, scalable interface that supported raising €3.9M at YC, then €17M in Series A, with no major redesign of the original product.
In 2 months
MVP delivered
MVP delivered
+50%
operational efficiency
operational efficiency
An MVP delivered in 2 months.
The founder can focus 100% on sales and landing first clients.
The founder can focus 100% on sales and landing first clients.
-50%
churn rate
churn rate
2x faster
user autonomy
user autonomy
Putting AI at the core of the UX helped users become autonomous 2x faster.
Cutting churn by 50%.
Cutting churn by 50%.
My offers
Built around your product stage, from idea to existing SaaS.
Product Launch
Build a product that's clear, useful and ready to use.
- Product framing & prioritization
- Usage-driven design (not just aesthetics)
- Fast, scalable development
Ready to de-risk your product before investing?
Discuss your projectFree 30-min call · No commitment · Tailored offer
Product Partnership
A product partner to evolve your product over time.
- Continuous product performance optimization
- KPI-driven prioritization
- Design & development support