Mariana Castilho

THE DOUBLE THREAT

@mrncst · Poolside

Drafted Jul 29, 2026

Does software design and code at poolside, previously Vercel, v0, and Pierre. Firmly in the camp of designers who ship the implementation too.

Often drafted with

Gavin Nelson@Gavmn
Product Designer
Interaction designer at OpenAI working on ChatGPT voice and CarPlay.
Maggie Appleton@Mappletons
Design Engineer
Staff research engineer at GitHub Next who describes herself as 'actually a designer.' Writes hand-illustrated essays at the intersection…
Rogie King@rogie
Product Designer
Product designer at Figma behind Draw and Shaders, plus a prolific run of plugins that do things Figma never planned for.