Nelly Seiglan

Designing AI-native products people trust & love.

Lead Product Designer & Founding Designer at Hexa. I take AI products from 0 → 1, shaping conversational interfaces, resilient design systems, and the teams that build them.

Nelly Seiglan Nelly SeiglanParis · Designing at Hexa
Nelly Seiglan, Lead Product Designer Nelly Seiglan · Lead Product Designer
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About

Where I am, and where I've been.

Now

  • 2026Speaking on Emotional Design in AI experiences at AI Product Day
  • 2026Writing Re:Design, perspectives on designing in the age of AI
  • 2025Founding Designer, designing AI-native products at Hexa

Background

  • Founding DesignerHexa · 2025 to present
  • Design ManagerKolecto · 2024 to 2025
  • Designer → Lead DesignerTheodo · 2021 to 2024
  • New BusinessDDB Paris · 2019 to 2021
Speaking

On stage about AI & design.

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Nelly Seiglan speaking on stage
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On stage · 2026
Upcoming Sep 2026

Design Ops in the AI era

How design operations evolve when AI reshapes the way teams research, prototype, and ship.

Round table Jun 2026

When emotion becomes the design

AI Experience Night round table, featured by The Ticket: when conversation becomes the product, emotion becomes the design.

Talk Mar 2026

Conversational design for AI products

At AI Product Day, making conversation the core of the product experience.

Selected work

Four products, taken seriously.

01 · Founding Designer

Verso

An AI interviewer capable of replacing human-led qualitative research while preserving structure, nuance, and trust.

Conversational UXAI InteractionAdmin Tooling
0+ studies conducted using the AI interviewer.
▶ play
02 · Founding Designer

Rose

A conversational layer that integrates into complex B2B websites and drives measurable engagement and conversion.

Conversation FlowsEmbedded WidgetsConversion UX
0% of visitors convert through Rose.
▶ play
03 · Lead Designer · Design Manager

Kolecto

A sales module that balances financial complexity with everyday usability, while building a team able to scale with the product.

Complex WorkflowsModular SystemsTeam Leadership
0 designers hired & structured into a lasting team.
▶ play
04 · Lead Product Designer

Milleis

Rebuilding the app from everyday banking to full wealth management, clarity and usability meeting premium private-banking codes.

Product RedesignDesign SystemMobile UX
0★ App Store rating after launch, up from 2.7.
▶ play
Re:Design · Substack

Writing about design in the age of AI.

Ideas, opinions, and field notes on building AI-native products, read by a growing community of designers and product people.

Read on Substack
Open to opportunities

Let's build something
people trust & love.

Currently open to Head / Lead of Design roles. If you're building AI-native products and care about craft, let's talk.