
I am Guillaume, but everyone calls me "G". It is the first UX optimization I offer. I have been in the field for 15 years working as a design leader mostly for VC-backed startups in London.
Most of my career has been spent at early-stage teams where design had to move fast, land credibly, and help unlock what came next.
Always collaborating with founders to bridge the gap between technology and market. I am often seen as the magician because I know how to turn complexity into beautiful simplicity. My collaborators call this "G-fying problems."Always collaborating with founders to translate technology into the product experiences they deserve. I am often seen as the magician because I am good at turning complexity into beautiful simplicity. My collaborators call this "G-fying problems."
I was lucky to be exposed to the AI space early. In 2018 I joined Papercup as Principal Designer to create one of the first AI translation tools. Since then I followed closely how AI was developing in the field. In 2025, as I was building a traditional agency myself, I realised how product development cycles changed and the way we always approached design services needed to change too.
So I repositioned Ghostudio around one belief:
The most valuable design intervention is a specific phase with a defined outcome, delivered as close as possible to the codebase, with senior thinking applied at the exact moment the product needs it the most.
I restarted this from scratch, alone. The plan is not to grow headcount, hire anyone available, and dilute what makes this work. Ghostudio will stay a boutique studio of elite designers. So every engagement gets the same level of thinking and craft.
G ✌️



