Antoine Pêcheux

The Core: one design system, fifteen brands

• Design systems
• Design tokens
• Component library
• Figma at scale
• Governance

The group launches consumer acquisition sites at a high tempo. Before the system, every new site rebuilt the same funnel pieces from scratch: slow launches, inconsistent UX, and bugs fixed in one place that survived in five others.

I designed and shipped The Core, a design system with its component library, published as an npm package that carries the front-end components and their back-end logic together. New sites assemble from it instead of rebuilding. I set the governance: what enters the system, what stays local to a brand, and who decides.

Payment flows that convert, in regulated markets

• PSD2 / 3DS
• Checkout UX
• Regulated markets
• Multi-market
• Banking

At Accor I redesigned booking and payment flows, web and app, and introduced PSD2-compliant 3DS journeys across international markets, inside a cross-brand design system serving 5,000+ hotels. The redesigned funnel reached 3.7% conversion with 34% traffic growth on 3M ad views.

At Idean, Capgemini's design arm, I designed core banking features for LCL: mortgage tracking, money transfers, budgeting. High-risk UX, where clarity and microcopy are the security layer. At Horizon Web I now run checkout A/B tests and multi-market payment optimization across the portfolio.

I like working under those rules. You cannot bend them, so the only room left to improve anything is the design itself.

Acquisition products, end to end

• CRO
• Acquisition funnels
• A/B testing
• Pricing & checkout
• Subscription flows

On paid traffic, the funnel decides whether the product makes money. I designed and supervised a portfolio of consumer products from concept to production: an ID photo service, PDF tools, a vehicle-history check, a reverse directory, an online check-in, an IQ test.

Landing pages, pricing pages, subscription flows, checkout. All of it iterated on live traffic against real ad spend, so a lost percent of conversion showed up in the monthly numbers.

Synarchy OS, my operating system of agents

• AI agents
• Automation
• Prompt architecture
• n8n
• Claude

My own problem: more projects than time, and a brain that starts more than it finishes. So I built one for myself. A personal knowledge vault wired to a fleet of AI agents that run on schedule: a watch agent that reads the AI news every day and briefs me on what matters to my projects, a weekly agent that rewrites my operational brief every Sunday, a content pipeline that writes and publishes three times a week.

It runs whether I show up or not. So does this site.